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Traffic Volume Study

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this presentation will provide a clear and useful concept about Traffic Volume Study

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  • 1. Ahsanullah University of Science & Technology Department of Civil Engineering Transportation Engineering Lab 4th Year; 2nd Semester Sec : A
  • 2. Presented By Group-1 Md. Abu Sayeed Maksudul Alim Abontee Barua K.M. Tawrat Wasim Ather Rezwana Binte Hafiz 09.02.03.001 09.02.03.003 09.02.03.005 09.02.03.006 09.02.03.008 09.02.03.053 Here comes your footer
  • 3. What is Traffic Study???..... Traffic studies may be grouped into three main categories: (1) Inventories, (2) Administrative studies, and (3) Dynamic studies.
  • 4. Traffic Engineering Studies – – – – – – – – – – – Volume studies Speed studies Travel time studies Delay studies Density studies Accident studies Parking studies Goods movement and transit studies Pedestrian studies Calibration studies Observation studies
  • 5. Volume Study Traffic volume is defined as the number of vehicles crossing a section of road per unit time at any selected period. Traffic volume studies are conducted to collect data on the number of vehicles and/or pedestrians that pass a point on a highway facility during a specified time period. This time period varies from as little as 15 min to as much as a year, depending on the anticipated use of the data.
  • 6. To determine of vehicle composition in traffic stream. To determine the service flow rate in PCU/PCE unit. To estimate of ADT based on expansion factor. To determine the directional distribution(DD). To draw flow fluctuation curves
  • 7. Effectiveness of a traffic control measure To check existing, operating service condition of a roadway section Planning traffic operation and control of existing facility To design intersection, signal timings, channelization Structural design of pavements, geometric design and road way capacity
  • 8. Volume Study Traffic volume studies are usually conducted when certain volume characteristics are needed, some of which follow: oAverage Annual Daily Traffic (AADT) oAverage Daily Traffic (ADT) oPeak Hour Volume (PHV) oVehicle Classification (VC) oVehicle Miles of Travel (VMT)
  • 9. DEFINITIONS AND USEFUL PARAMETRS
  • 10. Definitions & Useful Parameters • Volume: Volume on a road is the number of vehicles passing the measurement point during a specified time interval. • Demand: is a measure of the number of vehicles (or passengers, or persons) waiting for service in the given time period. • Capacity: is the maximum number that can reasonable be expected to be served in the given time period.
  • 11. Definitions & Useful Parameters • PCE: Passenger Car Equivalent is essentially the impact that a mode of transport has on traffic variables (such as headway, speed, density) compared to a single car • PCU: It is a vehicle unit used for expressing highway capacity unit
  • 12. Definitions & Useful Parameters • Daily Volumes: A common time interval for volumes is a day. • Daily volumes are frequently used as the basis for highway planning and general observations of trends.
  • 13. Daily Volume commonly used daily volume parameters Average Annual Daily Traffic (AADT) the average of 24-hour counts collected every day of the year. Average Daily Traffic (ADT) the average of 24-hour counts collected over a number of days greater than one but less than a year.
  • 14. Peak Hour Volume (PHV) the maximum number of vehicles that pas a point on a highway during a period of 60 consecutive minutes. Vehicle Classification (VC) with respect to the type of vehicles for cars, two-axle trucks, or three-axle trucks. Flow Rate Vehicles/ 15 min expanded to 1 hour Here comes your footer
  • 15. Factors  Hourly expansion factors (HEFs) are determined by the formula  Daily expansion factors (DEFs) are computed as
  • 16. Definitions (cont…) • Directional Distribution Directional Distribution is the predominant one-way traffic volume expressed as a percentage of two-way traffic
  • 17. Methods of counting volume PowerPlugs Templates for PowerPoint
  • 18. The two basic methods of counting traffic are:  Manual observation  Automatic recording
  • 19. Manual observation…… Most applications of manual counts require small samples of data at any given location. Manual counts are sometimes used when the effort and expense of automated equipment are not justified
  • 20. Electronic count board Mechanical count board
  • 21. Manual observation…… Tally Sheets Recording data onto tally sheets is the simplest means of conducting manual counts. The data can be recorded with a tick mark on a pre-prepared field form. A watch or stopwatch is necessary to measure the desired count interval
  • 22. Automatic recording Portable Counters Permanent Counters Methods of counting volume…
  • 23. Video Recording Automatic counting
  • 24. Types of Volume Counts Cordon Counts Screen Line Counts Intersection Counts
  • 25. Types of Volume Counts Pedestrian Volume counts Periodic Volume counts
  • 26. Cordon Counts
  • 27. Screen Line Counts
  • 28. Inters ection Count s
  • 29. Study Area ( Shahid Tajuddin Ahmed Avenue)
  • 30. General Information Location: Shahid Tajuddin Ahmed Avenue (Flyover) Date: June 20, 2013 Time: 8:15am - 8:30am Duration: 15 minute Weather: Sunny day Method: Manual (Direct)
  • 31. Car Bus Motorbike CNG Microbus/ Pajero
  • 32. DATA COLLECTION AND ANALYSIS
  • 33. RECONNAISSANCE SURVEY
  • 34. General Information Location: Shahid Tajuddin Ahmed Avenue Date: June 19, 2013 (Wednesday) Time: 3:30 to 3:45 pm Duration: 15 minute Weather: Clear Method: Manual (Direct)
  • 35. Number of vehicle Car,Jeep, 3 Motorcy Time Micro,Ta Wheeler cle xi 3:303:45 pm 215 80 33 Bus NMT Total 37 22 387
  • 36. Converted no. of Vehicle No. of vehicle PCE Converted no. of vehicle or PCU Car,Jeep,Micro,Taxi 215 1.0 215 3 Wheeler 80 0.5 40 Motorcycle 33 0.1 3.30 Bus 37 3.0 111 NMT 22 0.5 11 Total 387 Type of vehicle 380.3
  • 37.  Rate of Flow = 380.30 vehicle/15 min  Service flow rate of Reconnaissance survey = 380.30*4 = 1521.20 vehicle/hour
  • 38. FINAL SURVEY
  • 39. Field activities and Time distribution
  • 40. General Information Group no. 01  Location: Shahid Tajuddin Ahmed Avenue  Date: June 20, 2013 (Thursday)  Time: 8:15 to 8:30 am  Duration: 15 minute  Weather: Clear  Method: Manual (Direct)
  • 41. Group no. 01 (cont) Number of Vehicle Car,Jeep, 3 Motorcy Time Micro,Ta Wheeler cle xi Bus NMT Total 8:158:30 41 48 505 263 110 43
  • 42. Group no. 01 (cont) Converted no. of Vehicle Type of vehicle No. of vehicle PCE Converted no. of vehicle or PCU Car,Jeep,Micro,Tax i 263 1 263 3 Wheeler 110 0.5 55 Motorcycle 43 0.1 4.3 Bus 41 3 123 NMT 48 0.5 24 Total 505 469.30
  • 43. Group no. 01 (cont)  Rate of Flow = 469.30 vehicle/15 min  Service flow rate = Rate of Flow * 4 = 469.3*4 = 1877.20 vehicle/hour
  • 44. Group no. 01 (cont)  Hourly expansion factor, HEF = 17.11  Daily volume of traffic = Service flow rate*HEF = 1877.20*17.11 = 32118.892 vehicle/day
  • 45. Group no. 01 (cont)  Daily expansion factor, DEF = 7.012  Weekly volume of traffic = Daily volume of traffic*DEF = 32118.892*7.012m = 225217.67 vehicle/week
  • 46. Group no. 01 (cont)  Average daily traffic, ADT = Weekly volume of traffic/7 = 225217.67/7 = 32173.95 vehicle/day
  • 47. Group no. 01 (cont)  Annual average daily traffic = ADT*1.395 = 32173.95*1.395 = 44882.66 vehicle/day
  • 48. Number of Vehicle (Flyover to Shatrasta) Car,Jeep, 3 Motorcyc Micro,Tax Wheeler le i Group no. Time 1 8:15-8:30 263 110 2 8:30-8:45 262 3 8:45-9:00 4 5 Total Bus NMT Total 43 41 48 505 127 60 45 17 511 169 63 40 26 4 302 9:00-9:15 239 106 80 36 0 461 9:15-9:30 220 94 55 33 16 418 1153 500 278 181 85
  • 49. Converted no. of Vehicle (Flyover to Shatrasta) Type of vehicle No. of vehicle PCE Converted no. of vehicle or PCU Car,Jeep,Mic ro,Taxi 3 Wheeler Motorcycle Bus NMT Total 1153 1 1153 500 278 181 85 0.5 0.1 3 0.5 250 27.8 543 42.5 2016.3 % PCU 57.18395 12.39895 1.378763 26.93052 2.107821 100
  • 50. Vehicle Composition of Traffic Stream (Flyover to Shatrasta) 2.11% Car,Jeep,Micro,Taxi 26.93% 3 Wheeler 57.18% 1.38% 12.40% Motorcycle Bus NMT
  • 51. Number of Vehicle (Shatrasta to Flyover) Car,Jeep, 3 Motorcyc Micro,Ta Wheeler le xi Group no. Time 6 8:15-8:30 314 125 7 8:30-8:45 341 8 8:45-9:00 9 10 Total Bus NMT Total 110 24 7 580 111 88 35 40 615 282 132 74 25 0 513 9:00-9:15 341 142 62 48 0 593 9:15-9:30 314 105 61 32 0 512 1592 615 395 164 47
  • 52. Converted no. of Vehicle (Shatrasta to Flyover) Type of vehicle No. of vehicle PCE Converted no. of vehicle or PCU Car,Jeep,Mic ro,Taxi 1592 1 1592 3 Wheeler Motorcycle Bus NMT Total 615 395 164 47 0.5 0.1 3 0.5 307.5 39.5 492 23.5 2454.5 % PCU 64.86046 12.52801 1.609289 20.04482 0.957425 100
  • 53. Vehicle Composition of Traffic Stream (Shatrasta to Flyover) 0.96% 20.04% Car,Jeep,Micro,Taxi 1.61% 3 Wheeler 12.53% Motorcycle 64.86% Bus NMT
  • 54. Directional Distribution Flyover to Shatrasta Group 01 Group 02 Group 03 Group 04 Group 05 Average Directional distribution Service flow rate (PCU/hour) 1877.20 1900 1707 1632 1518 1726.84 46 % Shatrasta to Flyover Group 06 Group 07 Group 08 Group 09 Group 10 Average Directional distribution Service flow rate (PCU/hour) 1852 2121.20 1721.6 2392.8 1874.4 1992.32 54%
  • 55. Service flow rate Histogram (Flyover to Shatrasta) 2000 1877.2 1900 1707 1632 PCU/hour 1500 1518 1000 500 0 8:15-8:30 8:30-8:45 8:45-9:00 Time 9:00-9:15 9:15-9:30
  • 56. Service flow rate Histogram (Shatrasta to Flyover) 2392.8 2500 2121.2 PCU/hour 2000 1852 1874.4 1721.6 1500 1000 500 0 8:15-8:30 8:30-8:45 8:45-9:00 Time 9:00-9:15 9:15-9:30
  • 57. Directional Distribution 46% 54% Flyover to Statrasta Statrasta to Flyover
  • 58. Flow Fluctuation Flyover to Statrasta Time Statrasta to Flyover Group ADT % ADT no. (vehicle/day) Group ADT % ADT no. (vehicle/day) Average of % ADT 8:15-8:30 1 32173.95 21.23 6 31742.04 18.59 19.91 8:30-8:45 2 32564.73 21.49 7 36355.95 21.29 21.39 8:45-9:00 3 29256.84 19.30 8 29507.07 17.28 18.29 9:00-9:15 4 27971.39 18.45 9 41010.99 24.02 21.23 9:15-9:30 5 29596.88 19.53 10 32125.96 18.82 19.18 151563.79 100 170742.01 100 Total
  • 59. Flow Fluctuation Curve 25 % ADT 20 15 Flyover to Shatrasta 10 Shatrasta to Flyover Average 5 0 8:15-8:30 8:30-8:45 8:45-9:00 9:00-9:15 9:15-9:30 Time
  • 60. Recommendations Only 26% of total vehicles were Buses. Public transport should be increased and improved.
  • 61. Recommendations 5% of total vehicles were Non-motorized vehicles. A dedicated lane should be provided to facilitate nonmotorized vehicle.
  • 62. Recommendations 39% of total vehicles were private cars. To reduce the number of private cars two steps can be taken• Introducing TollsHOTCongestion pricing along some specific urban roadways. • Introducing parking permits and restricting parking space.
  • 63. Recommendations In order to pick up and drop off passengers, bus-lay-by should be provided.
  • 64. Operated manual counting without a single Hand Counter. No provision for cross check in the manual method. No vantage location from where video method could be used to collect data.
  • 65. Thank You…….