4. Page | ii
DOCUMENT AMENDMENT PAGE (TR-514)
EDITION
NO.
REVISION
NO.
DATE CLAUSE /
SECTION (PAGE)
AMENDMENTS NOTES
01 00 DEC 2016
02 01 NOVEMBER
2021
COVER Modified as below:
Document No: TR-514
Second Edition
November - 2021
Department of Municipalities and Transport
02 01 NOVEMBER
2021
LIST OF FIGURES
(PAGE-22)
Added as follows:
“Note: Some of the figures are for illustrative
purposes. For detailed figures, dimensions and
configurations, refer to Abu Dhabi Standard Drawings
TR-541”
02 01 NOVEMBER
2021
GLOSSARY -
DEFINITIONS
(PAGE-46)
Modified as below:
“STEAM: Strategic Transportation Evaluation &
Assessment Model of DMT”
02 01 NOVEMBER
2021
ACRONYMS
(PAGE-52)
Modified as below:
DMT: Department of Municipalities and Transport
DRM: Dhafra Region Municipality
(Deleted DMAT, UPC and WRM)
02 01 NOVEMBER
2021
ACRONYMS
(PAGE-52)
Added as follows:
RSA: Road Safety Audit
NMU: Non-Motorised Users
PTW: Powered two wheelers
VRS: Vehicle Restraint systems
ZOI: Zone of Intrusion
02 01 NOVEMBER
2021
1.2 / PARAGRAPH
#2
(PAGE-53)
Modified as below:
Designers must ensure roadway designs meet
operational and Road Safety requirements
02 01 NOVEMBER
2021
TABLE 1.2
(PAGE-62)
Modified as below:
Revised “DMAT” as “DMT”
02 01 NOVEMBER
2021
TABLE 1.2
(PAGE-62)
Added as follows:
“Road Safety Audit” by “ADM -Traffic Services
Section”
02 01 NOVEMBER
2021
1.4.2.15
(PAGE-68)
Modified as below:
“Standard parking bay (parallel): 2.7m (min. 2.5m) x
6.0m “
Also, “Note” deleted.
02 01 NOVEMBER
2021
TABLE 1.5
(PAGE-78)
Added as follows:
“Road Safety Audit”
02 01 NOVEMBER
2021
1.5.1
(PAGE-78)
Added as follows:
“Road Safety Audit
02 01 NOVEMBER
2021
1.5.9
(PAGE-84)
Modified as below:
“Safety considerations, including Road Safety Audits
requirements.”
02 01 NOVEMBER
2021
1.5.24
(PAGE-93)
Added as follows:
“Road Safety Audit Report”
02 01 NOVEMBER
2021
TABLE 2.6 & 2.7
(PAGE-107 &
108)
Added as follows:
“Note: As per the Executive Council resolution
1075/ECAS dated 19-07-2017, speed margin between
the posted speed and the speed cameras on the main
5. Page | iii
EDITION
NO.
REVISION
NO.
DATE CLAUSE /
SECTION (PAGE)
AMENDMENTS NOTES
roads is removed; therefore posted speeds on the
main roads where speed cameras are installed shall be
equal to the design speed.”
02 01 NOVEMBER
2021
2.6.1 /
PARAGRAPH #2
(PAGE-109)
Modified as below:
“City-Bus M is applicable for streets with designated
public bus routes and/or school bus routes at school
zones”
02 01 NOVEMBER
20 21
2.9 / LAST
PARAGRAPH
(PAGE-125)
Added as follows:
“Generally, embankment height between 1.5m-2.0m is
used and can be more than 3.0m at drainage facilities
and utility locations or Sabkha areas. Embankment
heights shall be studied and minimized as much as
possible unless any special cases such as Sabkha areas.
Utility providers’ requirements for existing/proposed
networks shall be optimized. Drainage facilities shall
be provided in natural stream/depressed areas in
order to minimize their negative impacts on the road
elevation, where applicable.”
02 01 NOVEMBER
2021
2.12
(PAGE-127)
Modified as below:
Road Safety
02 01 NOVEMBER
2021
2.12
PARAGRAPH #11
(PAGE-129)
Added as follows:
“The design team should assess their design against
TR-518, the Emirate of Abu Dhabi Roadside Design
Guide to ensure roadside safety is properly
considered.”
02 01 NOVEMBER
2021
2.13
(PAGE-129)
Added as follows:
(new) Section 2.13 Road Safety Audit
02 01 NOVEMBER
2021
3.2.3.1
LAST PARAGRAPH
(PAGE-136)
Modified as below:
“Shoulders shall not be applied on urban streets (other
than urban freeways and expressways)”
02 01 NOVEMBER
2021
3.2.3.4
BULLET #2 & 3
(PAGE-137)
Modified as below:
•For freeways and expressways, 1.2m inside shoulder
and 3.0m outside shoulder shall be applied.
•For divided rural collector roads, 1.2m inside and
outside shoulder shall be applied
•For undivided rural local roads, shoulder is not
applicable
02 01 NOVEMBER
2021
3.2.4.4
(PAGE-141)
Added as follows:
“It should be noted that rumble strips have minimal
effect on speed reduction and are more of an alerting
feature than a speed reduction feature.”
02 01 NOVEMBER
2021
3.2.6
(PAGE-141)
Added as follows:
“As highlighted in TR-518, kerbing has been shown to
be a major contributor to the vaulting and
destabilization of impacting errant vehicles,
particularly at high speeds and with higher kerbs.”
02 01 NOVEMBER
2021
3.2.6.2
(PAGE-143)
Modified as below:
“Kerb Upstand; Height of the typical upstand kerb
(Type-B) to be 100 mm for boulevards, avenues,
streets, access lanes, frontage lanes and parking areas”
02 01 NOVEMBER
2021
3.2.6.2
(PAGE-143)
Modified as below:
“Kerb Type A – This 50mm upstand kerb was
commonly used on Abu Dhabi streets, access lanes and
6. Page | iv
EDITION
NO.
REVISION
NO.
DATE CLAUSE /
SECTION (PAGE)
AMENDMENTS NOTES
frontage lanes from 2016 till the directives issued in
2018. Details are retained for information in case of
maintenance works involving existing kerbs at this
height.”
02 01 NOVEMBER
2021
3.2.6.2
(PAGE-144)
Modified as below:
“Kerb Type-B1 – This 150mm high upstand kerb…”
02 01 NOVEMBER
2021
3.2.6.2
(PAGE-144)
Modified as below:
“Kerb Type D - This flush kerb is used between the road
pavement and pedestrian ramps.”
02 01 NOVEMBER
2021
3.2.6.2
(PAGE-144)
Modified as below:
“Kerb Type F - This flush kerb is used between asphalt
pavement and interlocking vehicular pavement”
02 01 NOVEMBER
2021
3.2.6.2
(PAGE-144)
Added as follows:
“Rolled Kerb – This 50mm high dropped roll kerb may
be used as an option for (1x1) streets in Residential
Context areas with low operating speeds less, low
traffic volumes, where a proper edge zone is included
to provide protective elements such as bollards,
planting, planters and other street furniture”
02 01 NOVEMBER
2021
3.2.6.4
(PAGE-144)
Modified as below:
“•On urban boulevards, and avenues, streets, access
lanes, frontage lanes and parking areas, 100 mm high
upstand curb is typically used”
Also 2nd
and 4th
bullets are deleted
02 01 NOVEMBER
2021
FIGURE 3-9
(PAGE 147)
Added “Rolled Kerb” details
02 01 NOVEMBER
2021
3.3.2
BULLET #10
(PAGE-149)
Added New Bullet as follows:
“10. Median width must take into account the ZoI of
the RRS/VRS to be used and ensure that the street
lighting and foundations are not within this ZoI and at
risk of being struck (also refer to TR-518).”
02 01 NOVEMBER
2021
3.3.3.2
BULLET #8
(PAGE-154)
Added New Bullet as follows:
“8. Landscaping. Where raised medians are landscaped
with vegetation, due consideration needs to be given
to how this will be maintained especially on 80kph
roads or higher.”
02 01 NOVEMBER
2021
3.3.3.3
BULLET #4
(PAGE-154)
Added New Bullet as follows:
“4. Road Safety. The adverse road safety implications
should be analyzed considering risk of errant vehicle
losing control and overturning or hitting rigid objects
in the depressed median”
02 01 NOVEMBER
2021
3.5
PARAGRAPH #4
(PAGE-161)
Added as follows:
“All barrier types have a zone of intrusion (ZoI) which
ranges from around 0.5m for concrete barriers due to
high sided vehicles leaning over during an impact, to
around 1.6m for typical W-beam safety fence and over
2m for normal wire rope safety fence. Also refer TR-
518”
02 01 NOVEMBER
2021
3.5
PARAGRAPH #5
(PAGE-161&162)
Added as follows:
“Systems should ideally meet the requirements for
MASH (the minimum acceptable standard is NCHRP-
350) and it should be noted that systems worldwide
are generally not tested at 140kph or 160kph speeds
and therefore may not work as intended.”
7. Page | v
EDITION
NO.
REVISION
NO.
DATE CLAUSE /
SECTION (PAGE)
AMENDMENTS NOTES
02 01 NOVEMBER
2021
3.7.4.1
LAST BULLET
(PAGE-168)
Added last bullet as follows:
“•Wire Rope Safety fence is the preferred RRS in areas
subject to blowing sand.”
02 01 NOVEMBER
2021
FIGURE 3.24
(PAGE-180)
Modified vertical clearance as below:
“5.5 Min.”
02 01 NOVEMBER
2021
3.12
(PAGE-181)
Added as follows:
1) Item No “3.12”
2) Add “Cul-De-Sacs and Turnarounds should be
designed in a way that discourages vehicles from
mounting the kerb and using the Non-Motorised
users (NMU) path to access nearby through roads”
at the end of the paragraph
02 01 NOVEMBER
2021
6.2.3
(PAGE-264)
Modified as below:
“1. Uncurbed Roadways. It is acceptable to provide a
minimum longitudinal gradient of approximately 0.0%
without affecting the requirements in Clause 6.4.1.5,
but only if the roadway will not be curbed in the
future.…….”
“2. Curbed Streets: The median edge or centerline
profile on roadways and streets with curb and gutter
desirably should have a longitudinal gradient of at least
0.2% for curbed local roads and collectors, 0.3% for
curbed arterials, freeways and expressways.”
02 01 NOVEMBER
2021
TABLE 7-3
(PAGE-351)
Modified as below:
“Left shoulder width= 1.2m”
Also Note 1a and 1b deleted.
02 01 NOVEMBER
2021
TABLE 8-1
(PAGE-366)
Modified as below:
“Shoulder width= 1.2m”
02 01 NOVEMBER
2021
TABLE 8-2
(PAGE-367)
Modified as below:
“Shoulder width= Not Applicable”
“Note-2: A 0.6m shy should desirably be inserted
when a barrier is present.”
02 01 NOVEMBER
2021
8.2.3.1
PARAGRAPH #2
(PAGE-370)
Modified as below:
“Refer to Table 8-1 and 8-2 for shoulder widths”
02 01 NOVEMBER
2021
8.2.3.1
PARAGRAPH #2
(PAGE-370)
Modified as below:
“Where cyclists are to be accommodated on the
shoulder, the designer should provide a
minimum paved width of 1.5 m”
02 01 NOVEMBER
2021
8.2.4
PARAGRAPH #2
(PAGE-371)
Modified as below:
“Desirably, the full width of the roadway including
shoulders, footpath and cycle track on the approach
roadways shall continue on the bridges.”
02 01 NOVEMBER
2021
TABLE 8-9 & 8-10
(PAGE-378 &
379)
Modified as below:
“Left shoulder width= 1.2m”
Also Note 2b deleted.
02 01 NOVEMBER
2021
8.3.2.2
(PAGE-382)
Modified as below:
“Where cyclists are to be accommodated on the
shoulder, the designer should provide a
minimum paved width of 1.5 m”
Added as follows:
“The cyclists are not allowed to use freeways,
expressways and highways”
8. Page | vi
EDITION
NO.
REVISION
NO.
DATE CLAUSE /
SECTION (PAGE)
AMENDMENTS NOTES
02 01 NOVEMBER
2021
9.3.6.2
(PAGE-395)
Modified as below:
“On urban boulevards, avenues, streets, access lanes,
frontage lanes and parking areas, 100 mm high
upstand curb is typically used”
02 01 NOVEMBER
2021
9.3.6.3
BULLET #4
(PAGE-400)
Modified as below:
“4. Angled Parking: For 1-way local roads, access
roads and parking areas, diagonal or parallel parking
is preferred whereas perpendicular parking may also
be applied in special cases, such as traffic circulation
and parking demand; however, road safety issues
shall also be taken into consideration. For 2-way local
roads, access roads and parking areas perpendicular
and parallel parking shall be applied”
02 01 NOVEMBER
2021
9.3.6.3
BULLET #7
(PAGE-401)
Added as follows:
“Prohibit parking within 10.0 m of the beginning of the
curb radius on the leg to any intersection with a Yield
control, flashing beacon, stop sign.
In addition prohibit parking within the approach and
exit to a Traffic Signal due to visibility to Pedestrians
and Primary Signal Heads and maneuvering
difficulties”
02 01 NOVEMBER
2021
9.3.6.3
BULLET #7
(PAGE-402)
Added as follows (last bullet):
“Where Parking demand is high, parallel parking may
be allowed as long as it does not affect visibility on
both approach and exit”
02 01 NOVEMBER
2021
9.3.6.4
BULLET #3C
(PAGE-402)
Modified as below:
“Pedestrian & Cycle Refuge. A minimum width of 2.0
m is required for a pedestrian refuge.
Where there is heavy pedestrian activity or a cycle
route, provide a minimum median width of 3.0 m.”
02 01 NOVEMBER
2021
9.3.6.7
(PAGE-404)
Added as follows:
“All Cycle Facilities designs or schemes must be
subject to Road Safety Audits Stage- 1 (at Preliminary
Design) and Stage-2 (at Detailed Design) followed by
Stage-3 (Pre-opening) in accordance with TR-540; the
focus should be on NMU connectivity to the facility,
positive protection/separation from roadway traffic
and speed calming features along the cycle route.”
02 01 NOVEMBER
2021
9.3.6.9
BULLET #5
(PAGE-404)
Modified as below:
“5. Cyclists. Frontage lanes may include a shared lane
for cycles in the same direction of traffic. Additional
cycle track may be needed for the opposite direction
for cyclists. Cyclists should not be riding against
vehicular traffic on the frontage lanes”
02 01 NOVEMBER
2021
9.3.6.9
BULLET #10
(PAGE-405)
Added as follows:
“Side median should provide adequate buffer and
lateral clearance for street furniture on both sides of
the travelled lanes.”
02 01 NOVEMBER
2021
9.3.8
(PAGE-406)
Added last paragraph as follows:
“Ensure all structural elements have adequate ZOI
(Zone of Intrusion) between them and any required
road restraint system; refer to TR-518.”
02 01 NOVEMBER
2021
TABLE 9-10 TO 9-
19
Modified as below:
“Parking Width: 2.7m”
9. Page | vii
EDITION
NO.
REVISION
NO.
DATE CLAUSE /
SECTION (PAGE)
AMENDMENTS NOTES
(PAGE-411 to
420 )
02 01 NOVEMBER
2021
FIGURE 10-4
(PAGE-437)
Added as follows:
“Note: Provide physical separation between through
and left turning movements for Lead-Lag junctions.”
02 01 NOVEMBER
2021
10.3.1.11
LAST
PARAGRAPH
(PAGE-466)
Added as follows:
“In all cases consideration must be given for visibility
to NMUs at the crossings at these junctions.”
02 01 NOVEMBER
2021
FIGURE 10-26
(PAGE-475)
Modified as below:
Figure revised. DUPM Technical Circular No:
DUPM/USO/UPS/IP/OUT/2018/387 dated 25-
February-2018; i.e. width of slip ramp to be 4m+0.5m
(shy) and exit radius to be 10m
02 01 NOVEMBER
2021
FIGURE 10-26
(PAGE-475)
Note added as follows:
“If considerable volume of traffic flow occurs by buses
and trucks resulting in large size vehicles being the
predominant design vehicles using the right turn slip
lane, the width and entry/exit radii of the slip lane
maybe increased as per the swept path analysis.”
02 01 NOVEMBER
2021
10.4.3
PARAGRAPH #1
(PAGE-476)
Modified as below:
“For urban slip lanes, the curb-to-curb width will
typically be 4.5 m. Do not use widths greater than 4.5
m as they may encourage drivers to try to use the slip
lane as two lanes.”
02 01 NOVEMBER
2021
10.4.7
BULLET #5
(PAGE-484)
Modified as below:
“Design acceleration lanes at intersections in the same
manner as for interchange ramps using the parallel
design. See Section 12.6.2. However, those distances
for interchanges may be excessive under restricted
urban conditions, where the length of acceleration
lanes for urban intersections may be suitably adjusted.
Taper lengths may vary from 30 m to 45 m instead of 90
m. The below values are recommended where
acceleration lanes are required at Signalized
Intersections and where right-in right-out (RIRO)
located on urban expressways and arterial roads. Traffic
studies and Road Safety audit shall be undertaken for
selecting the proper acceleration length as per the site
constraints.”
02 01 NOVEMBER
2021
10.4.7
BULLET #5
(PAGE-484)
New Table Added as follows:
02 01 NOVEMBER
2021
10.6.1
BULLET #3
(PAGE-490)
Added as follows:
“The refuge Island should be adequately sized for
pedestrian and cyclists storage.”
02 01 NOVEMBER
2021
10.6.2.1
(PAGE-491)
Added last bullet as follows:
10. Page | viii
EDITION
NO.
REVISION
NO.
DATE CLAUSE /
SECTION (PAGE)
AMENDMENTS NOTES
“the use of flush islands for separation of opposing
traffic streams should be avoided”
02 01 NOVEMBER
2021
10.6.3.1
BULLET #4
(PAGE-492)
Modified as below:
“The minimum width for a flush-type island on new
construction is 3.0 m and for reconstruction projects
1.5 m”
02 01 NOVEMBER
2021
10.7.2.2
PARAGRAPH #1
(PAGE-504)
FIGURE 10-38
(PAGE-505)
Modified as below:
“………….. For urban areas, the functional length will
be the taper length plus the storage length or the
deceleration length plus the taper length, whichever
is larger. “
02 01 NOVEMBER
2021
10.7.2.2
BULLET #2C
(PAGE-507)
Modified as below:
“Distances shown in Section 12.6.1 may be applied on
urban facilities; however, this is not always feasible
due to restricted urban conditions. Length of
deceleration lanes for urban intersections may be
suitably adjusted as per the design speed and/or
traffic studies justifying additional storage lane
requirement. Taper length to be 30 m instead of 75
m. The below values are recommended where
deceleration/storage lanes are required at Signalized
Intersections and where right-in right-out located on
urban expressways and arterial roads.”
02 01 NOVEMBER
2021
10.7.2.2
BULLET #2C
(PAGE-507)
New Table Added as follows:
02 01 NOVEMBER
2021
TABLE 11-4
(PAGE-547)
Modified “Safety->Disadvantages-> Bullet #1”as
below:
“Increase in low-severity single-vehicle and fixed-
object crashes compared to other intersection
treatments.”
02 01 NOVEMBER
2021
TABLE 11-4
(PAGE-547)
Added Bullet #3 to “Safety->Advantages” as follows:
“•Lower rates of fatal and serious crashes”
02 01 NOVEMBER
2021
11.7.5
PARAGRAPH #3
(PAGE-559)
Added at the end of the paragraph as follows:
“The offside kerb line projection should guide drivers
around the central Island.”
02 01 NOVEMBER
2021
TABLE 11-7
(PAGE-561)
Added Note #3 under the table as follows:
“*** Multilane Roundabouts: From local experience
85m ICD appears to be one of the safest designs
when dealing with 3 lane roundabouts especially at
higher speeds.”
02 01 NOVEMBER
2021
11.7.8.3
PARAGRAPH #3
(PAGE-567)
Modified as below:
“Multilane circulatory roadway lane widths typically
range from 4.0 m to 4.9 m. Use of these values results
in a total circulating width of 8.0 m to 9.8 m for a two-
lane circulatory roadway and 12.0 m to 14.6 m total
width for a three-lane circulatory roadway.”
11. Page | ix
EDITION
NO.
REVISION
NO.
DATE CLAUSE /
SECTION (PAGE)
AMENDMENTS NOTES
02 01 NOVEMBER
2021
11.8.4
NEW CLAUSE
(PAGE-573)
New Clause Added as follows:
“Roundabout Visibility Checks”:
Checking visibility for drivers approaching, driving
through or exiting roundabouts is very important
safety aspect to be considered when designing
roundabouts. Engineers shall consider these checks to
ensure different visibility envelopes are clear from
any obstruction to line of sight. The following visibility
checks to be carried out by designers
• Forward Visibility on approach
• Forward visibility at entry
• Visibility to the left
• Circulatory Visibility
• Pedestrian crossing visibility
For further details, refer to British Standards for
Highways DMRB (Design Manual for Roads and
Bridges) - Geometric Design of Roundabouts
02 01 NOVEMBER
2021
12.3.7
BULLET #1
(PAGE-584)
Modified as below:
“Figure 12-8”
02 01 NOVEMBER
2021
12.5.4
BULLET #1
(PAGE-646)
Modified as below:
•Where the truck ADT is greater than 15%, the design
speed for the initial curve after the exit curve shall be
determined to facilitate the safety movement of the
traffic.
•Use a design speed of 50 km/h (maximum) for
cloverleaf interchange loop ramps between freeways.
02 01 NOVEMBER
2021
12.5.6
BULLET #1 &
TABLE 12-7
(PAGE-647 &
649)
Modified as below:
“For diagonal ramps and loop ramps, the ramp
travelled way width is 5.0 m with a 1.2 m wide left
shoulder, and a 3.0 m wide right shoulder with no
curb clearance on both sides.”
Also Figure 12-50 and Table 12-7 revised accordingly.
02 01 NOVEMBER
2021
13.2.2.6
BULLET #5
(PAGE-686)
Bullet #5 deleted
02 01 NOVEMBER
2021
13.2.2.6
BULLET #6
(PAGE-686)
Modified as below:
“Vertical separation of pedestrian paths from vehicle
travel ways should be maintained. Typical kerb height
for Boulevards, Avenues, Access Lanes and Frontage
Lanes to be 10cm.”
02 01 NOVEMBER
2021
TABLE 13-2
(PAGE-687)
Modified as below:
Max. width of cycle track is revised as 3.0m
02 01 NOVEMBER
2021
TABLE 13-2
(PAGE-687)
Added a Note for “Cycle Track” as follows:
(2) Desirable width of 1-way cycle track is 1.5m and
the absolute minimum width of 1-way cycle track is
1.2m (for retrofitting projects only). desirable width
of 2-way cycle track is 3.0m and the absolute
minimum width of 2-way cycle track is 2m (for
retrofitting projects only)””
02 01 NOVEMBER
2021
13.2.3.4
BULLET #6
(PAGE-690)
Modified as below:
“Place the vehicle stop bar 3m ahead of the crosswalk”
12. Page | x
EDITION
NO.
REVISION
NO.
DATE CLAUSE /
SECTION (PAGE)
AMENDMENTS NOTES
02 01 NOVEMBER
2021
13.2.3.6
BULLET #12
(PAGE-697)
Modified as below:
“Shall provide a minimum of 4% (Refer to Table 16-1)
reserved parking facilities for disabled access with
minimum dimensions of (2.5+1.5) m x 5.5 m “
02 01 NOVEMBER
2021
13.2.3.7
BULLET #1
(PAGE-697)
Modified as below:
“Typical preferred curb height is 100 mm for
Boulevards, Avenues, Access Lanes and Frontage
Lanes”
02 01 NOVEMBER
2021
13.3.4.2
LAST PARAGRAPH
(PAGE-706)
Modified as below:
“Where this is not possible and the distance between
the edge of the shoulder and the shared use path is
within clear zone , a suitable positive separation by
physical barrier or Vehicle Restraint systems (VRS)
should be provided.”
02 01 NOVEMBER
2021
15.1
(PAGE-721)
Added last paragraph as follows:
“All ITS structure, systems and sub systems
infrastructure that are along the road side and within
clear zone need a suitable physical barrier or Vehicle
Restraint systems (VRS).”
02 01 NOVEMBER
2021
16.3.1.2
LAST BULLET
(PAGE-739)
Added last bullet as follows:
“Consideration must be given to how maintenance
workers and vehicles will access the landscaping and
where will vehicles stop to unload mowers or pick up
waste plant material like palm fronds etc.”
02 01 NOVEMBER
2021
16.8
BULLET #1
(PAGE-760)
Modified as below:
“In rural areas, a truck lay-by should be provided
approximately every 25 km (maximum).”
02 01 NOVEMBER
2021
16.8
(PAGE-760)
Added Bullet #8 as follows:
“Lay-bys must be physically separated from Main line
traffic by a VRS/Guard Rail with proper end
termination.”
02 01 NOVEMBER
2021
16.9.2.4
BULLET #2
(PAGE-766)
Modified as below:
“Parking lots adjacent to each other (served from
different aisles) should be separated by a raised
sidewalk at least 1.0m wide which shall be
unobstructed and clear from any signs or street
lighting poles.”
02 01 NOVEMBER
2021
16.9.2.5
BULLET #1
(PAGE-766)
Modified as below:
“Typical stall widths (measured perpendicular to the
parked vehicle) are 2.7 m”
02 01 NOVEMBER
2021
FIGURE 16-15
(PAGE-768)
Modified as below:
Width of parallel parking is revised as 2.7m
13. ROAD GEOMETRIC DESIGN MANUAL
Page 1
TOC SECOND EDITION - JANUARY 2022
TABLE OF CONTENTS
Table of Contents.......................................................................................................................... 1
List of Figures............................................................................................................................. 16
List of Tables............................................................................................................................... 23
Definitions................................................................................................................................ 27
Geometric Qualifying Words .................................................................................................. 51
Acronyms................................................................................................................................. 52
1 INTRODUCTION TO ROAD DESIGN ................................................................................... 53
1.1 Overview ....................................................................................................................... 53
1.2 Objectives ..................................................................................................................... 53
1.3 Application.................................................................................................................... 54
1.3.1 Departures from Standards...................................................................................... 54
1.3.2 Departure from Standards Request ......................................................................... 54
1.4 DESIGN CONCEPT DEVELOPMENT............................................................................ 56
1.4.1 Transportation Planning........................................................................................... 56
1.4.2 Environmental Factors Influencing Design............................................................... 62
1.4.3 Technical Investigations........................................................................................... 72
1.4.4 Traffic Data Collection ............................................................................................. 73
1.4.5 Survey Control / Field Surveys................................................................................. 75
1.5 DESIGN CONCEPT REPORT........................................................................................ 77
1.5.1 Contents.................................................................................................................. 77
1.5.2 Executive Summary................................................................................................. 81
1.5.3 Introduction.............................................................................................................. 81
1.5.4 Traffic Analysis ........................................................................................................ 81
1.5.5 Description Of Alternatives ...................................................................................... 82
1.5.6 Design Data............................................................................................................. 83
1.5.7 Typical Sections ...................................................................................................... 83
1.5.8 Geometrics .............................................................................................................. 83
1.5.9 Interchange / Intersection Configuration .................................................................. 84
1.5.10 Parking Study .......................................................................................................... 84
1.5.11 Hydrology And Hydraulics........................................................................................ 85
1.5.12 Subsurface Investigations........................................................................................ 85
1.5.13 Bridge Type Selection.............................................................................................. 86
1.5.14 Tunnel Selection Criteria.......................................................................................... 89
14. ROAD GEOMETRIC DESIGN MANUAL
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TOC SECOND EDITION - JANUARY 2022
1.5.15 Utility Impact Analysis.............................................................................................. 90
1.5.16 Socio - Economic Analysis....................................................................................... 91
1.5.17 Agriculture Impact.................................................................................................... 91
1.5.18 Public Feedback ...................................................................................................... 91
1.5.19 Signing and Pavement Markings ............................................................................. 92
1.5.20 Lighting Concepts.................................................................................................... 92
1.5.21 Construction Staging ............................................................................................... 92
1.5.22 Cost Estimate .......................................................................................................... 92
1.5.23 Conclusions / Recommendations............................................................................. 93
1.5.24 Appendix ................................................................................................................. 93
1.5.25 Drawings ................................................................................................................. 94
2 GENERAL DESIGN CRITERIA AND CONTROLS ............................................................... 95
2.1 Overview ....................................................................................................................... 95
2.2 Context Sensitive Solutions......................................................................................... 95
2.2.1 Basic Principles ....................................................................................................... 95
2.2.2 Roadway Design ..................................................................................................... 96
2.2.3 Additional Resources............................................................................................... 97
2.3 Sustainability ................................................................................................................ 98
2.4 Functional Classification ............................................................................................. 99
2.4.1 Relationship to Roadway Design ............................................................................. 99
2.4.2 Function of Roadway System for Rural Areas........................................................ 102
2.4.3 Function of Roadway System for Urban Areas ...................................................... 103
2.4.4 Urban Streets ........................................................................................................ 105
2.5 Speed........................................................................................................................... 106
2.5.1 Design Speed........................................................................................................ 106
2.5.2 Average Running Speed........................................................................................ 107
2.5.3 Average Travel Speed........................................................................................... 107
2.5.4 Operating Speed ................................................................................................... 107
2.5.5 Posted Speed Limit................................................................................................ 108
2.5.6 Truck/Car Speed Relationship ............................................................................... 108
2.6 Design Vehicles .......................................................................................................... 109
2.6.1 Vehicle Dimensions ............................................................................................... 109
2.6.2 Turning Templates................................................................................................. 110
2.6.3 Acceleration and Deceleration Rates..................................................................... 115
2.7 Transportation Demand ............................................................................................. 115
