The document discusses various types of railway sleepers and their advantages and disadvantages. It covers wooden, steel, cast iron, and concrete sleepers. It also discusses obligatory points that determine railway alignments, factors considered in soil and land suitability analysis for railways, and approaches to achieve sustainability in transportation, including controlling transport demand, modal choice, and coordinating different transportation modes. The key points are summarized in 3 sentences or less.
Railway Track Components. A Railway Track has many Components in it. they are as follows, Rails; Sleepers; Ballast; Formations or subgrades; A good quality and strong aggregate materials, steel I section to use in the construction of railway tracks. 1. Rails. Rails are the first main element in the Railway Track Components. It is of an I section make with steel. Two rails fix opposite to each other.
components of a railroad track
rail track components
railroad components
parts of a railroad track
parts of a rail
parts of a railroad crossing
rail components
railroad switch part components
components of a railroad track
rail track components
railroad track switch components
railway track and structure
Railway engineering is a multi-faceted engineering discipline dealing with the design, construction and operation of all types of railway systems. It encompasses a wide range of engineering discipline as Civil engineering, electrical engineering, mechanical engineering and computer engineering. A great many other engineering sub-disciplines are also called upon to combine and create railroad engineering. The civil engineers plan the railway track, design the alignment and right of way and finally they operate.
Railway Track Components. A Railway Track has many Components in it. they are as follows, Rails; Sleepers; Ballast; Formations or subgrades; A good quality and strong aggregate materials, steel I section to use in the construction of railway tracks. 1. Rails. Rails are the first main element in the Railway Track Components. It is of an I section make with steel. Two rails fix opposite to each other.
components of a railroad track
rail track components
railroad components
parts of a railroad track
parts of a rail
parts of a railroad crossing
rail components
railroad switch part components
components of a railroad track
rail track components
railroad track switch components
railway track and structure
Railway engineering is a multi-faceted engineering discipline dealing with the design, construction and operation of all types of railway systems. It encompasses a wide range of engineering discipline as Civil engineering, electrical engineering, mechanical engineering and computer engineering. A great many other engineering sub-disciplines are also called upon to combine and create railroad engineering. The civil engineers plan the railway track, design the alignment and right of way and finally they operate.
Railway Engineering:
Permanent Way, Rail Gauge, Broad Gauge, Meter Gauge, Narrow Gauge, Choice of Gauge, Uniformity of Gauge, Rails - Double headed, Bull Headed, Flat footed Rails, Sleepers, Ballast, Formation, Types of sleepers, Merits and Demerits, Functions of sleepers, Requirements of good sleepers,Spacing of sleepers, Sleeper Density, Characteristics of good ballast, Capacity of a railway track, Track Fixtures and Fastening, Types of fixtures and fastening, Fish Plates, Dog Spikes, Rail Joints, Creep of Rails, Indication of Creep, Disadvantages of creep in rails, Remedies for prevention of creep, Theory of creep, Coning of Wheels, Theory of coning, Adzing of sleepers, Gradients, Grade compensation on curves, Radius and degree of curves, Super-elevation, Negative cant, Cant Deficiency, Equilibrium speed, Maximum permissible speed, Necessity of geometric design, Track defects, Transition curves, Vertical curves, Points and crossings, Types of crossings, Turnouts, Switches, Interlocking, Signalling, Classification and types of Signals, Semaphore type signal, Detonating signals, Dock signals, Shunting Signals, Warner Signals, Reception & Departure Signals, Railway Station, Purpose of a Railway Station, Site selection for Railway Stations, Track Drainage, Why Need of Proper Drainage.
Airport Engineering:
Basic Terms (AAI, ICAO, IATA), Airport System plan, Master plan, Airport Classification, Site Selection, Imaginary Surfaces, Aircraft Characteristics, Important components of Airport Layout, Runway, Runway Configuration, Runway Orientation, Factors affecting Runway Orientation, Wind Direction Indicator, Wind Rose Diagram - Type I & Type II, Basic Runway Length, Corrections for Elevation, Temperature & Gradient, Actual Runway Length, Runway Geometric (ICAO), Taxiways, Exit Taxiways, Location of Exit Taxiways, Holding Aprons, Hanger, Terminal Building, Aircraft Parking, Airport Marking & Lightning.
I'm Irfan Nasir. Currently studying Civil Engineering at Mehran University of Engineering and Technology. This is a slide made by me on Defects in rails from the subject Transportation Engineering.
This Presentation Contains Railway engineering concepts. The contents covered are Points & crossings: Turnout, switches, throw switches, diamond crossing, cross-overs, single slip and double slip, scissor cross-over, Triangle & turntable. Feel free to write in Comment Section or drop a line in my Inbox amanbathla710@gmail.com
State Farm sponsored lesson: "Road Design and Safety" is a PowerPoint for primary and secondary students that overviews safety on roadways and ways in which engineers incorporate safety when designing roads. It also highlights careers in road design and safety. Additionally, this lesson can be paired with a "Design your own 3D Model of Transportation Effectiveness and Roadway Safety" activity.
The attached powerpoint presentation contains details about Traffic aids - Street Furniture. Useful for CE6006 - Traffic Engineering and Management - Elective - for Civil Engineering Students, (7th Semester - Anna University Affliated Institutions)
A truss is an assembly of members such as beams, connected by nodes, that creates a rigid structure. In engineering, a truss is a structure that "consists of two-force members only, where the members are organized so that the assemblage as a whole behaves as a single object"
Railway Engineering:
Permanent Way, Rail Gauge, Broad Gauge, Meter Gauge, Narrow Gauge, Choice of Gauge, Uniformity of Gauge, Rails - Double headed, Bull Headed, Flat footed Rails, Sleepers, Ballast, Formation, Types of sleepers, Merits and Demerits, Functions of sleepers, Requirements of good sleepers,Spacing of sleepers, Sleeper Density, Characteristics of good ballast, Capacity of a railway track, Track Fixtures and Fastening, Types of fixtures and fastening, Fish Plates, Dog Spikes, Rail Joints, Creep of Rails, Indication of Creep, Disadvantages of creep in rails, Remedies for prevention of creep, Theory of creep, Coning of Wheels, Theory of coning, Adzing of sleepers, Gradients, Grade compensation on curves, Radius and degree of curves, Super-elevation, Negative cant, Cant Deficiency, Equilibrium speed, Maximum permissible speed, Necessity of geometric design, Track defects, Transition curves, Vertical curves, Points and crossings, Types of crossings, Turnouts, Switches, Interlocking, Signalling, Classification and types of Signals, Semaphore type signal, Detonating signals, Dock signals, Shunting Signals, Warner Signals, Reception & Departure Signals, Railway Station, Purpose of a Railway Station, Site selection for Railway Stations, Track Drainage, Why Need of Proper Drainage.
Airport Engineering:
Basic Terms (AAI, ICAO, IATA), Airport System plan, Master plan, Airport Classification, Site Selection, Imaginary Surfaces, Aircraft Characteristics, Important components of Airport Layout, Runway, Runway Configuration, Runway Orientation, Factors affecting Runway Orientation, Wind Direction Indicator, Wind Rose Diagram - Type I & Type II, Basic Runway Length, Corrections for Elevation, Temperature & Gradient, Actual Runway Length, Runway Geometric (ICAO), Taxiways, Exit Taxiways, Location of Exit Taxiways, Holding Aprons, Hanger, Terminal Building, Aircraft Parking, Airport Marking & Lightning.
I'm Irfan Nasir. Currently studying Civil Engineering at Mehran University of Engineering and Technology. This is a slide made by me on Defects in rails from the subject Transportation Engineering.
This Presentation Contains Railway engineering concepts. The contents covered are Points & crossings: Turnout, switches, throw switches, diamond crossing, cross-overs, single slip and double slip, scissor cross-over, Triangle & turntable. Feel free to write in Comment Section or drop a line in my Inbox amanbathla710@gmail.com
State Farm sponsored lesson: "Road Design and Safety" is a PowerPoint for primary and secondary students that overviews safety on roadways and ways in which engineers incorporate safety when designing roads. It also highlights careers in road design and safety. Additionally, this lesson can be paired with a "Design your own 3D Model of Transportation Effectiveness and Roadway Safety" activity.
The attached powerpoint presentation contains details about Traffic aids - Street Furniture. Useful for CE6006 - Traffic Engineering and Management - Elective - for Civil Engineering Students, (7th Semester - Anna University Affliated Institutions)
A truss is an assembly of members such as beams, connected by nodes, that creates a rigid structure. In engineering, a truss is a structure that "consists of two-force members only, where the members are organized so that the assemblage as a whole behaves as a single object"
State-of-the-art review of FRP strengthened RC slabsIJSRD
Many concrete structures are getting weakened or collapsed due to corrosion of steel reinforcement in structures and other factors. Rehabilitation and strengthening of concrete structures with FRP (Fibre Reinforced Polymers) has been a useful technique since last few years. FRP sheets or plates are very suitable for strengthening not only because of their strength, but also due to the simplicity in the application. In this review paper, different strengthening techniques using FRP and other materials are reviewed. It can be concluded from the literature review that FRP is one of the efficient option for strengthening in either of the case like increasing the load carrying capacity of structures or to restore the original capacity of the structure after distress due to any means.
Comparitive study on rcc and composite (cft) multi storeyed buildingseSAT Journals
Abstract In India reinforced concrete structures are mostly used since this is the most convenient & economic system for low-rise buildings. However, for medium to high-rise buildings this type of structure is no longer economic because of increased dead load, less stiffness, span restriction and hazardous formwork. So the structural engineers are facing the challenge of striving for the most efficient and economical design solution. Use of composite material is of particular interest, due to its significant potential in improving the overall performance through rather modest changes in manufacturing and constructional technologies. Steel-concrete composite columns are used extensively in modern buildings. Extensive researches on composite columns in which structural steel section are encased in concrete have been carried out. In-filled composite columns, however have received limited attention compared to encased columns. In this study E-Tabs nonlinear software is used for simulation of steel concrete composite (CFT) with steel reinforced concrete structures (RCC) of G+14, G+19 and G+24 stories each are considered for comparative study. Comparison of parameters like time period, storey displacement and storey drift is done. Keywords: Composite CFT columns, bracings, shear wall, time period, storey displacement and storey drift.
Flexural behaviour of light gauge cold formed steel members comparison of i...eSAT Journals
Abstract Light – gauge steel evolved as a building material in the 1930’s and reached large scale usage only after the Second World War. In comparison with conventional steel construction, where standard hot rolled shapes are used, the cold formed light gauge steel structures are relatively new development. This paper presents a study on behaviour and economical of cold formed steel (CFS) built up channel section using different codes. This paper provides an experimental investigation for the bending strength of Cold – Formed light gauge steel plain (stiffened) rectangular sections. The test specimens were brake pressed from high strength structural steel sheets. In addition, the test strengths were compared with the design strengths calculated using the Indian Standard and Euro codes Specification for Cold –Formed steel structures. Flexural members are linear members in which axial forces act to cause elongation (stretch). The theoretical data are calculated using Indian Standard code IS 801-1975 and the section properties of the specimens are obtained using IS 811-1975. The specimens are designed under uniformly distributed loading with simply supported condition. The research project aims to provide which code of practice given more economical, high bending strength, more load carrying capacity and high flexural strength. The studies reveal that the theoretical investigations limit state methods (SI method) have high bending strength, high load caring capacity, maximum deflection and minimum local buckling& distortional buckling compare to the other codes. Keywords: Cold formed steel, built up channel section, limit state method, working stress method, bending strength, deflection
The slides are from the talk that I delivered on an INTERNATIONAL WEBINAR on Public Speaking skills called ''SPEAK UP'21'' organized by LEO club of Anna University CEG - Guindy, Chennai on an International collaboration with LEO CLUB of KAATSU International University (KIU) - Srilanka.
Instrumental Landing System - ILS - Airport EngineeringTheerumalai Ga
A short note on the Instrumental Landing system used for flight landing in Airport Engineering. Worked for an assignment. Hope it'll help you for a read to know about ILS
ITS - Intelligent Transport System - An OverviewTheerumalai Ga
A brief overview on the developing trends of Transportation Engineering. Intelligent Transport system uses TECHNOLOGY and existing INFRASTRUCTURAL facilities to provide maximum utility of transport facilities Sincere thanks to FABER MAUNSELL for the material reference and AECOM.COM
BRIHADEESWARAR TEMPLE - An Ancient Architectural marvelTheerumalai Ga
One Architectural marvel that has stood a millennium with violent natural disturbances and more violent human disturbances. One ancient TAMIL - DRAVIDIAN architecture with all it's structural intricacies and the SCIENCE which makes the modern day scientist to baffle. A SCIENTIFIC place than a SPIRITUAL place. One challenging structure analysed from the point of view of engineering details.
A prize winning presentation on "TENSEGRITY architecture" under the topic of "SMART STRUCTURES" for 8 minutes on "BUILDOFEST 2017"
Tensegrity, tensional integrity or floating compression is a structural principle based on the use of isolated components in compression inside a net of continuous tension, in such a way that the compressed members (usually bars or struts) do not touch each other and the prestressed tensioned members (usually cables or tendons) delineate the system spatially.
STEEL - As a Building material:
A 20-minute brief presentation on STEEL for a seminar session.
This presentation covers the areas of :
Origin of Steel, Discovery of STEEL, History of steel making, Classification of STEEL , Properties of steel, Mild Steel , Characteristic tension test curve, Medium Carbon Steel, High Carbon Steel, TOR Steel, Manufacturing processes.
Why STEEL is preferred to concrete?
Disadvantages of STEEL
Some Important Steel Structures
HIGG's BOSON - The 'GOD' Particle - Theerumalai GaTheerumalai Ga
A debut prize winning 5 minute presentation on the GOD particle 'Higg's Boson" at "CHENMAPH- 2K16". A brief description on what is Higg's Boson, it's properties, it's discovery, it's Nobel prize feat and it's importance. A short note on "L.H.C" - Large Hadron Collidor
NEUTRINO AND IT’S SOCIAL APPLICATIONS - Prize Winning 5 minute brief presentation - AnuYogin 2k16
Abstract : On Documents
Introduction:
For the past few decades , the area of “NEUTRINO” has always been a nostalgic area for almost all the nerd physicists around the world. TWENTY-EIGHT flashes of blue light may not seem like much to crow about. But for hundreds of scientists long in their pursuit, witnessing these faint flickers over the last two years has been a cause for celebration, because they mark the arrival of ghostly messengers called NEUTRINOS from the far—and incredibly violent—corners of the universe.
Higg's Boson - The GOD particle
An Abstract submitted for the prize winning presentation on "CHENMAPH - 2K17" for " PHYSICS PAPER PRESENTATION" on " The GOD particle - Higg's Boson"
HALL effect - SemiConductors - and it's Applications - Engineering PhysicsTheerumalai Ga
A 20 mins discussion on the "HALL EFFECT and it's applications" of Semiconductors and a brief explanation about Hall Sensors with a derivation and video attached. Engineering Physics - important area of discussion for Anna University examination- seminar
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Railway Engineering Assignment - Types of Sleepers
1. Theerumalai Ga
GCE - Tirunelveli
Contents:
Railway Assignment - 1
Contents:
✓ Types of Sleepers – Advantages
and Disadvantages
✓ Obligatory Points
✓ Soil and Land Suitability
✓ Coordination of all modes to attain
SUSTAINABILITY in Traffic
2. 1 Railway Assignment - 1
Created by Theerumalai Ga, Government College of Engineering.
RAILWAY ENGINEERING
Railway Sleepers - Advantages &
Disadvantages:
1. Wooden Sleepers
These are commonly 254mm wide by 127mm thick in cross section by 2600 mm long.
The sleepers are first seasoned (drying for up to 12 months so that to remove the
juice/sap) and treated with preservative. Creosote is an oil generally used/ sprayed on
the surface. They are either hard wood or soft wood type.
Wooden sleepers are the ideal type of sleeper. Hence they are universally used. The
utility of timber sleepers has not diminished due to the passage of time.
Switch Ties: The primary use for switch ties is to transfer load (as from the name)
and are made of hard wood. This type is preferably used in bridge approaches, heavily
traveled, railway crossovers and as transition ties.
Softwood Ties: softwood timber is more rot (decay) resistant than hardwood, but
does not offered resistance to spike hole enlargement, gauge spreading, also are not
as effective in transmitting the load to the ballast section as the hardwood tie. Softwood
ties and hardwood ties should not be mixed on the main track. Softwood ties are
typically used in open deck bridges.
Concrete Ties: Concrete ties are rapidly gaining acceptance for heavy haul mainline
use as well as for curvature greater than 2 degree. They are made of RCC or pre-
stressed concrete containing reinforcing steel wires.
An insulator plate is placed between rail and tie to isolate the tie electrically.
Advantages of Wooden Sleepers
1. They are cheap and easy to manufacture
2. They are easy to handle without damage
3. They are more suitable for all types of ballast
3. 2 Railway Assignment - 1
Created by Theerumalai Ga, Government College of Engineering.
4. They absorb shocks and vibrations better than other types of sleepers.
5. Ideal for track circuited sections
6. Fittings are few and simple in design
7. Good resilience
8. Ease of handling
9. Adaptability to non standard situation
10.Electrical insulation
Disadvantages of Wooden Sleepers
1. They are easily liable to attack by vermin and weather
2. They are susceptible to fire
3. It is difficult to maintain gauge in case of wooden sleepers
4. Scrap value is negligible
5. Their useful life is short about 12 to 15 years.
2. Steel Sleepers
• Steel ties are used where wood or concrete is not favorable, for example in
tunnels with limited headway clearance
• They are also used in heavy curvature prone to gage widening.
• This type of steel ties can cause problem to signals control system
• Some problem of fatigue cracking have also experienced.
• Due to the increasing shortage of timber in the country and other economic
factors have led to the use of steel and concrete sleepers on railways.
In the design of Steel sleeper, the following are considered:
• It should maintain perfect gauge
• Can fix the rail and there should be no movement longitudinally
• Should have sufficient effective area to transfer load from rail to ballast.
• The metal of sleepers should be strong enough to resist bending
• The design life should be 35 years
4. 3 Railway Assignment - 1
Created by Theerumalai Ga, Government College of Engineering.
Advantages of Steel Sleepers
1. It is more durable. Its life is about 35 years
2. Lesser damage during handling and transport
3. It is not susceptible to vermin attack
4. It is not susceptible to fire
5. Its scrap value is very good
Disadvantages of Steel Sleepers
1. It is liable to corrosion.
2. Not suitable for track circuiting
3. It can be used only for rails for which it is manufactured
4. Cracks at rail seats develop during the service.
5. Fittings required are greater in number
3. Cast Iron Railway Sleepers
They are further divided into two categories:
1. Cast iron pot type sleepers
2. Cast iron plate type sleepers
Advantages of Cast Iron Sleepers
1. Service life is very long
2. Less liable to corrosion
3. Form good track for light traffic up to 110 kmph as they form rigid track
subjected to vibrations under moving loads without any damping
4. Scrap value is high
Disadvantages of Cast Iron Sleepers
1. Gauge maintenance is difficult as tie bars get bent up
5. 4 Railway Assignment - 1
Created by Theerumalai Ga, Government College of Engineering.
2. Not suitable for circuited track
3. Need large number of fittings
4. Suitable only for stone ballast
5. Heavy traffic and high speeds (>110kmph) will cause loosening of keys and
development of high creep
4. Concrete Railway Sleepers
They have design life of up to 40 years. They can easily be moulded into the
required/design shape to withstand stresses induced by fast and heavy traffic.
The added weight helps the rail to resist the forces produced due to thermal expansion
and which can buckle the track. The weight of concrete sleepers is about 2.5 to 3 time
the wooden sleepers. Pre-tensioned concrete sleepers are usually preferred now days
Reinforced Concrete and prestressed concrete sleepers are now replacing other
types of sleepers except in some special circumstances like bridges etc. where
wooden sleepers are used. Concrete sleepers may be of two types:
1. Mono Block Concrete Sleepers
2. TWIN BLOCK Concrete sleepers
Advantages of Concrete Sleepers
1. It is more durable having greater life (up to 50years)
2. It is economical as compare to wood and steel.
3. Easy to manufacture.
4. It is not susceptible to vermin attack
5. It is not susceptible to fire
6. Good for track circuited areas
Disadvantages of Concrete Sleepers
1. It is brittle and cracks without warning.
2. It cannot be repaired, and required replacement.
3. Fittings required are greater in number.
4. No scrap value
6. 5 Railway Assignment - 1
Created by Theerumalai Ga, Government College of Engineering.
Obligatory or Controlling Points:
These are the points through which the railway line must pass due to
political,strategic, and commercial reasons as well as due to technical
considerations. The following are obligatory or controlling points.
Important cities and towns These are mostly intermediate important towns,
cities,or places which of commercial, strategic, or political importance.
Major bridge sites and river crossings The construction of major bridges for
large rivers is very expensive and suitable bridge sites become obligatory points
for a good alignment.
Existing passes and saddles in hilly terrain Existing passes and saddles should
be identified for crossing a hilly terrain in order to avoid deep cuttings and high
banks.
Sites for tunnels The option of a tunnel in place of a deep cut in a hilly terrain is
better from the economical viewpoint. The exact site of such a tunnel becomes an
obligatory point.
Soil and Land Suitability Analysis:
Land and Soil suitability is the fitness of a given type of land and it’s soil for a
defined use. The land may be considered in its present condition or after
improvements. The process of land suitability classification is the appraisal and
grouping of specific areas of land in terms of their suitability for defined uses.
In this chapter, the structure of the suitability classification is first described. This is
followed by an account of the range of interpretative classifications recognized:
qualitative, quantitative and of current or potential suitability. In accordance with
the principles given in Chapter 1, separate classifications are made with respect to
each kind of land use that appears to be relevant for the area. Thus, for example, in
a region where arable use, animal production and forestry were all believed to be
possible on certain areas, a separate suitability classification is made for each of
these three kinds of use.
There may be certain parts of the area considered, for which particular kinds of use
are not relevant, e.g. irrigated agriculture beyond a limit of water availability. In
these circumstances, suitability need not be assessed. Such parts are shown on maps
or tables by the symbol NR: Not Relevant
7. 6 Railway Assignment - 1
Created by Theerumalai Ga, Government College of Engineering.
The range of classifications
The Framework recognizes four main kinds of suitability classification, according
to whether it is qualitative or quantitative, and refers to current or potential
suitability.
Each classification is an appraisal and grouping of land units in terms of their
suitability for a defined use
Qualitative and Quantitative Classifications
A qualitative classification is one in which relative suitability is expressed in
qualitative terms only, without precise calculation of costs and returns.
Qualitative classifications are based mainly on the physical productive potential of
the land, with economics only present as a background. They are commonly
employed in reconnaissance studies, aimed at a general appraisal of large areas.
A quantitative classification is one in which the distinctions between classes are
defined in common numerical terms, which permits objective comparison between
classes relating to different kinds of land use.
Quantitative classifications normally involve considerable use of economic criteria,
i.e. costs and prices, applied both to inputs and production. Specific development
projects, including pre-investment studies for these, usually require quantitative
evaluation.
8. 7 Railway Assignment - 1
Created by Theerumalai Ga, Government College of Engineering.
Qualitative evaluations allow the intuitive integration of many aspects of benefits,
social and environmental as well as economic. This facility is to some extent lost in
quantitative evaluations. The latter, however, provide the data on which to base
calculations of net benefits, or other economic parameters, from different areas and
different ksinds of use. Quantitative classifications may become out of date more
rapidly than qualitative ones as a result of changes in relative costs and prices.
Classifications of Current and Potential Suitability
A classification of current suitability refers to the suitability for a defined use of land
in its present condition, without major improvements. A current suitability
classification may refer to the present use of the land, either with existing or
improved management practices, or to a different use.
A classification of potential suitability refers to the suitability, for a defined use, of
land units in their condition at some future date, after specified major improvements
have been completed where necessary.
Common examples of potential suitability classifications are found in studies for
proposed irrigation schemes. For a classification to be one of potential suitability it
is not necessary that improvements shall be made to all parts of the land; the need
for major improvements may vary from one land unit to another and on some land
units none may be necessary.
In classifications of potential suitability it is important for the user to know whether
the costs of amortization of the capital costs of improvements have been included.
Where these are included, the assumptions should state the extent to which input e
have been costed and the rates of interest and period of repayment that have been
assumed.
Classification with amortization is only possible if the repayment of capital costs can
be apportioned to identifiable areas of land. If the benefits from major expenditure
are not confined to the agricultural sector (as in multipurpose irrigation and power
schemes), responsibility for capital repayments is difficult to assess. In these
circumstances, amortization costs will usually be excluded from the evaluation.
The distinction between qualitative and quantitative classifications, and between
current and potential suitability, do not fully describe the nature of a classification.
Two further considerations of importance are treatment of the location factor and of
amortization of capital costs, but these by no means exhaust the range of
possibilities. They are not distinguished as further specific types of classification. A
suitability classification needs to be read in conjunction with the statement of the
data and assumptions on which it is based
9. 8 Railway Assignment - 1
Created by Theerumalai Ga, Government College of Engineering.
The results of land suitability evaluation
The results of an evaluation will usually include the following types of information,
the extent to which each is included varying with the scale and intensity of the study.
Some examples are given in Chapter 5.
i. The context, physical, social and economic, on which the evaluation is based. This
will include both data and assumptions.
ii. Description of land utilization types or of major kinds of land use which are
relevant to the area. The more intensive the study, the greater will be the detail and
precision with which these are described.
iii. Maps, tables and textual matter showing degrees of suitability of land mapping
units for each of the kinds of land use considered, together with the diagnostic
criteria. Evaluation is made separately for each kind of use.
iv. Management and improvement specifications for each land utilization type with
respect to each land mapping unit for which it is suitable. Again, as the survey
becomes more intensive, so the precision with which such specifications are given
increases; thus in a semi-detailed survey a need for drainage might be specified,
whilst in a detailed survey the nature and costs of drainage works would be given.
v. Economic and social analysis of the consequences of the various kinds of land use
considered.
vi. The basic data and maps from which the evaluation was obtained. The results,
particularly the suitability classification itself, are based upon much information of
value to individual users. Such information should be made available, either as an
appendix to the main report or as background documentation.
vii. Information on the reliability of the suitability estimates. Such information is
directly relevant to planning decisions. It will also aid any subsequent work directed
towards improving the land suitability classifications, by indicating weaknesses in
the data and aspects which might repay further investigation.
10. 9 Railway Assignment - 1
Created by Theerumalai Ga, Government College of Engineering.
Coordination of all modes to achieve SUSTAINABILITY:
Based on the principle of traffic management and international experience in ensuring
sustainable transport, we develop ten potential approaches for Vietnam and other countries as
summarised below:
Approach 1: Control transport demand Worldwide experience has shown that the capacity of
transport systems cannot be extended to fulfil every demand. Infrastructure extension is not
only limited by financial constraints, but also by environmental conditions. One of the keys to
avoid at least unnecessary traffic demand is land-use control. Land-use planning should be
made in favour of short-distance trips connecting places of human activities, and must reflect
the characteristics of different transport modes or systems, including their capacity. Transit-
oriented development (TOD) is certainly one of the most effective and long-term strategies in
this context. For example, Curitiba, Brazil has successfully integrated transit and land-use
planning to achieve its desired settlement patterns. The city has innovated its public transport
system so as to create a linear city. The densities of housing and jobs are made higher in
transport corridors with exclusive busways in the centre, and urban expressways used by both
cars and express buses on either side. The coordination of land-use regulation and transit
service has resulted in one of the highest rates of transit use anywhere. There were about 1.3
million passengers using Curitiba’s public transport everyday, and 28% of them shifted from
cars. In daily operation, traffic management should control the demand with specific aims. It
should try to influence the departure time to avoid overloads in peak hours. Most recently,
Hanoi has applied a flexible time scheme to change the departure time and thus could help
reduce traffic volume in peak hours. Furthermore, we should influence mode choice by trying
to make people use public transport, bike, and walking instead of riding motorcycles and
private cars. It is also possible to influence route choice, and even the choice of trip destination
to allow for more efficient and environmentally compatible traffic. Information systems will
contribute significantly to optimizing the distribution of travel demand by time and location.
Finally, influencing demand must target not only passenger transport but also freight transport
as they are interrelated and using the same road infrastructures in many cases.
Approach 2: Control modal choice Modal choice is important in many aspects; for instance,
traffic safety and efficiency can be improved by shifting travellers from dangerous and low-
capacity modes (e.g., car and motorcycle) to safer and high-capacity modes (e.g., train and
bus). To do so, we need to apply Push-and-Pull measures with a principle “Making the modes
with lower preference less attractive and the preferred modes more attractive”. The
implementation of Push and Pull measures must be coordinated to synergise impacts. While
thinking about Push measures and restrictions, we always need to ensure attractive alternatives
for the users. Full measures may include, for example, pedestrian zones, safe bicycle routes,
and signal priority for buses, separated bus lanes, Bus Rapid Transit (BRT) and Metro System.
To attract a large number of passengers, public transport must provide the passengers with
shorter travel times, reliable timetables and/or significantly lower costs as compared to private
motorised transport modes. For example, in Denmark the government provided financial grants
to integrate train and regional bus services allowing passengers across regions to use a single
ticket to transfer between modes and giving free passes to children (under 12 years old). This
pull policy has contributed to a significant increase in the number of public transport passengers
in the country. We need to prioritise the preferred modes by location and situation because the
best modes depend a lot on the location. While individual transport is well compatible and
efficient in less densely populated areas, it is impossible to handle the traffic if all the cars go
to the city centre. Therefore, we must support the concept of intermodal travel through
11. 10 Railway Assignment - 1
Created by Theerumalai Ga, Government College of Engineering.
provision of Park-and-Ride, Bike-and-Ride, bike transport in buses and trains, and so forth. In
addition, there are important restrictive or push measures to control modal choice. For
instances, many historic cities in Italy have implemented access control schemes since the early
1990s; parking management is a powerful tool to influence travel demand; and road pricing is
also an important instrument.
Approach 3: Use mobility pricing instruments to control demand Let’s ask a question: In the
current situation of Vietnam, what could motivate you not to go in the peak hours with your
motorcycle or car, and even what could make you shift to another mode? Obviously, it might
be congestion. But congestion is really the worst instrument to control demand as it has so
many negative impacts on our life and environment. Therefore, we have to find alternatives.
Clearly, we can understand that mobility pricing is not only an instrument for financing but
also a most efficient tool to control demand. There are many examples of pricing instruments:
vehicle and fuel taxes, city tolls, parking fees, public transport tariffs, public transport
commuter pass for students and employees, and so on. Also, demand-actuated or variable
prices should be used in public transport, parking, and road pricing. Several transport modes
are practicing variable prices to a large extent; In fact, prices of air tickets are higher in peak
demand periods with an aim to shift passengers to off-peak demand periods. Unfortunately, so
far, most countries have been not thinking about such options for road pricing. Road pricing
can influence not only mode choice and spatial distribution of traffic but also the distribution
of departure times. In some developing cities, there are intentions to apply simple pricing
systems, such as paying a flat rate per day or even per year. Frankly speaking, such a simple
pricing scheme cannot help much in controlling the demand. Singapore has shown greatly
success in implementing road pricing. Singapore introduced the area licence scheme in 1975
already with the purpose of reducing traffic during peak periods in the CBD area, and the
system was proved highly successful. In 1998, Singapore introduced an electronic road pricing
system covering the CBD and a number of urban expressways; there was a huge reduction in
the number of vehicles entering the tolled areas at certain times of the day, thereby reducing
congestion and improving travel speeds on the whole network.
Approach 4: Operate transport infrastructure dynamically and situation-responsive Traffic
demand changes over time and location, but capacity of traffic and transport systems is usually
the same. This fact has led to situations in which the demand exceeds the supply, thus causing
congestions and environmental degradation. Therefore, it is important to operate transport
infrastructure and traffic systems more dynamically in response to changes in traffic demand
and other conditions. Available resources in public transport and private transport should be
used in a flexible way, depending on time and situation, and on the current mode priorities.
Good examples are tidal-flow systems: traffic-actuated signal control, dynamic speed limits,
dynamic route signs, on-demand public transport services, and many others. Obviously, the
detection of traffic situations and devising effective control methods are only feasible by
employing advanced technologies. Congestions can be avoided or lessen if counter-measures
are taken quickly. Therefore, dynamic traffic management strategies must be planned in
advance, evaluated and agreed upon by all stakeholders.
Approach 5: Promote new concepts of mobility Individual value system and mobility
behaviour are changing, specifically in young generations. Recently, in developed countries
we can observe that the affiliated interest in private car ownership and use is decreasing
significantly. In the mean time, new technologies are emerging quickly and enable changes in
individual value, lifestyle and travel behaviour. The Internet, smart phones, satellite navigation,
and new applications (so-called Apps) are playing a major role in the changes. These new
12. 11 Railway Assignment - 1
Created by Theerumalai Ga, Government College of Engineering.
technologies allow an easy and spontaneous access to individualised information and services,
not only in public transport but also in other transport modes. Examples are traffic information
services, multimodal routing services, car rental, car sharing, bike rental, ride sharing, taxi
sharing, pedestrian navigation, and so on. In Vietnam, Uber and Grabtaxi are new taxi calling
services using the up-to-date telecommunication technologies. Users can order a taxi by
sending a message or by checking a map on his or her smartphone. Once the request has been
sent, close vehicles are notified and the closest driver may contact the user. Although the
operation of such services is still discussed in term of legal basis, however these services can
be considered as new method for individual mobility and may support urban traffic
management as well. Such new developments are also overcoming basic hindrances to
intermodal transport. The flexible and situation-responsive mobility services may help reduce
traffic problems and thus should be promoted.
Approach 6: Promote the applications of Intelligent Transport Systems As mentioned, new
technologies allow changes in mobility behaviour and support safe, efficient and
environmentally compatible operations of traffic and transport systems. Intelligent Transport
Systems (ITS) and its applications play an important role in transport as it can help improve
traffic flow, road safety, security and crime reduction, public transport, freight efficiency, and
environmental impacts. In developing countries, including Vietnam, high-quality and high-
capacity public transport system is an effective and long-term solution to solve the transport
problems. ITS applications are playing a dispensable role in improving service quality and
integrating different public transport systems and services. Receiving the right information at
the right time and in the right place is critical for successful urban public transport, especially
in a multimodal transport system. It is hard to imagine the existence of flexible and high-quality
urban public transport without the deployment of ITS.
Applications of ITS in urban public transport include:
(1) pre-trip and in-trip information services via Internet and smart phone;
(2) electronic displays on the remaining time that a vehicle will arrive at stop/station;
(3) ticket vending machines;
(4) electronic tickets;
(5) security cameras;
(6) electronic information signs;
(7) other passenger information services, such as displaying vehicle location, walking
distances between stops, and parking information.
Many ITS applications are already implemented by different stakeholders and for different
purposes. However, we usually cannot exploit all advantages of the systems because
information and data cannot be exchanged seamlessly between the different systems.
Therefore, sustainability in this context needs to address the integration of systems and ensure
their compatibility. Furthermore, the emergence of “Big Data” technologies (e.g., Floating
Phone Data from mobile networks) can improve traffic data and thus significantly reduce the
costs of data collection. A multimodal ITS vision and framework architecture must be provided
13. 12 Railway Assignment - 1
Created by Theerumalai Ga, Government College of Engineering.
to allow for an effective development of multimodal traveller services. We are convinced that
the field of ITS needs further attention in every country. ITS applications are well used in
developed countries (e.g., Japan, Singapore, the United States, and European countries like
Germany and France). In developing countries, ITS applications are still limited but steadily
developing. In Vietnam, we are implementing a project named REMON (Real Time
Monitoring of Urban Transport - Solutions for Traffic Management and Urban Development
in Hanoi) as a first step towards the ITS deployment for traffic management in the country.
The idea of this project is to detect urban transport conditions in real time. Systems developed
under the project include provision of traffic monitoring information to road users, traffic
condition, traffic management, and long-term measures to solving traffic - related problems.
The REMON project is also developing an application for mobile devices to generate traffic
data and provide real-time information on the current level of service (LOS). It is called
REMON Traffic Viewer App for smart phones and it can also run on either iOS or Android
operating system. A first version has been tested in the field. The App is equipped with the
standard functionalities to draw a map on a small monitor. Like the standard Traffic Viewer,
this App can also show additional information like bus stops, gas stations or automatic teller.
Apart from the displaying function, this App is also designed to collect traffic data especially
from motorcycle drivers. While installing the App on mobile phone, the user will be requested
to agree on providing information like real-time positions.
Approach 7: Pay a due attention to traffic safety and environmental impacts Traffic accidents
and fatalities are a serious problem in developing countries, particularly Vietnam. Countries
have spent efforts to improve traffic safety and gain some success. But they still need to
continue the efforts and further upgrade the efforts to a higher level. Beside this, we must aware
that the number of fatalities caused by traffic-related air pollution may far exceed the number
of traffic accident fatalities. In the UK, air pollution related fatalities were triple of the traffic
accident fatalities, and the ratio in Germany as well was about approximately 3 times .Though
there has been no study on this topic, it is quite sure that the situation in Vietnam and other
developing countries is much more severe. Influencing modal choice, route choice, and driving
behaviour has become very important to increase traffic safety and to protect citizens from
noise and air pollution. Measures, such as heavy vehicle bans, environmental zones, and speed
limits, have been implemented in European cities. In Germany, for example over 70 cities have
set up low emission zones (LEZ). Drivers, who infringe the regulations, risk a 40 Euro fine and
one penalty point on their license recorded at the driver-licensing database. Enforcement is so
important for improving traffic safety. Monitoring of speed violations, red light running, and
overloaded heavy vehicles show a high potential to improve traffic safety, and clearly it is one
of the most applicable areas for ITS. Further, to cope with changing traffic situations, traffic
management needs to be dynamic and environmentally responsive. This requires not only
traffic control systems but also a comprehensive monitoring of traffic situations and
environmental conditions. Finally, e-mobility can contribute to the lessening of environmental
pollutions. In motorcycle-dominated nations like Vietnam, e-bike and e-scooter shall be
considered because it bears a good prospective for environmental compatibility. For a
significant market penetration of such e-mobility vehicles, appropriate technological
improvements, sales incentives, and stringent traffic emission standards need to be in place.
Approach 8: Make the quality of traffic transparent and improve it continuously How is the
traffic in Vietnam? How is it in Hanoi as compared to other cities in Vietnam and in other
countries like Frankfurt, Germany? Besides your individual impressions, can you give some
objective figures on the achieved quality, such as average delay and travel speed? How good
is the traffic management? What performance indicators are you using for assessing the public
14. 13 Railway Assignment - 1
Created by Theerumalai Ga, Government College of Engineering.
transport system? It is often that the real quality of traffic, especially urban traffic, is not known
and hence the interrelations between used resources (i.e., the inputs) and traffic quality (i.e.,
the outputs) are not transparent. Developed countries such as the US and Japan have already
established a comprehensive set of traffic performance measurements for the purposes of
monitoring, evaluating, and improving the performance of transport and traffic systems. In
principle, independent parties should do such measurements; the execution and supervision
should be separated. Frequent quality reports may be used not only within the transportrelated
institutions but also as a tool for politicians to prove the achieved quality in the overall transport
system and to support decisions to allocate resources. In short, like other fields of production
and service provision, the principles of quality management should be applied to all traffic and
transport systems, including policy-making. Approach 9: Provide sufficient and sustainable
financing of transport To continuously improve mobility and traffic safety, it requires a
stronger investment and new approaches to funding for the growing list of transport projects in
developing countries. Reducing congestion in cities and delivering productivity and economic
growth all rely heavily on an efficient, integrated and safe transport network. Achieving these
outcomes will inevitably require a substantial reform to the status quo. Funding the priority list
of transport projects will require increased government revenues, a wider application of user
pays, smarter thinking about value capture and innovative private funding, in addition to
options such as reinvesting the proceeds from the sale of public assets, to create immediate
capacity for urgent priority transport projects. But over the medium-term, fundamental reform
will also be needed, because the current charging/pricing and investment system seems to be
inequitable to road users and unsustainable for taxpayers. In many countries, we can observe
more and more attempts to introduce road pricing as an instrument for revenue and fund raising.
However, road users only accept additional payments if such new revenues are definitely
utilized to improve the transport system and not being cut for other expenses. Therefore, the
impacts of pricing instruments must be carefully assessed and balanced in each case.
Furthermore, we can seek for financing sources from other beneficiaries, such as commercial
housing and real estate developers in the neighbourhood.
Approach 10: Create the right institutional framework for intermodal transport For the
convenience of the users, traffic and transport must be a holistic system. The supplies of
different systems must be closely coordinated and integrated to allow for a seamless mobility
and transport in every situation. It is worth mentioning that London is a good example: an
authority called “Transport for London” manages all road traffic and public transport. During
the introduction of congestion pricing in London, they were able to optimise the whole urban
transport system. The establishment of Transport for London also allowed cross financing,
revenues from road pricing could be used to finance the public transport improvements. In
some countries, the association of public transport authorities provide a good starting point for
further development, but there still lacks of intermodal traffic management authorities.
Ultimately, every city needs an integrated traffic management authority that brings together the
competences in public transport and road network operations on a regional level.
15. 14 Railway Assignment - 1
Created by Theerumalai Ga, Government College of Engineering.
Summary:
Since developing countries, including Vietnam, are certainly far from being complete in
collecting potential approaches to achieve sustainability in traffic management, the ten
mentioned approaches may be a useful reference. It includes:
• Control transport demand
• Control modal choice
• Use mobility pricing instruments to control demand
• Operate transport infrastructure dynamically and situation-responsive
• Promote the applications of Intelligent Transport Systems
• Promote new concepts of mobility
• Pay a due attention to traffic safety and environmental impacts
• Make the quality of traffic transparent and improve it continuously
• Provide sufficient and sustainable financing of transport
• Create the right institutional framework for intermodal transport
• It should be highlighted again that ITS plays an important role in realising many of
these approaches towards traffic sustainability. Given the local conditions, specific
measures need to be devised under each approach.
References:
1)https://www.aboutcivil.org/types-of-railway-sleepers-advantages-disadvantages.html
2) Approaches to Achieve Sustainability in Traffic Management Manfred Boltzea , Vu Anh Tuanb,* a Technische
Universität Darmstadt, Otto-Berndt-Str. 2, Darmstadt 64287, Germany b Vietnamese-German University, Binh Duong
820000, Vietnam
3) http://www.fao.org/docrep/x5310e/x5310e04.htm
4) NPTEL – Traffic Engineering – Railway
5) http://creativecommons.org/licenses/by-nc-nd/4.0/
6) International Journal on Traffic Engineering.
7) AREMA ENERGY – Rail Energy Supply
8) www.railwayresearch.org