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Determination of
Operating Speed
ROADMAP 2
1 3 5
6
4
2
Introduction Methodology Discussion
Objective &
Background
Result Conclusion
Fundament
al Design
Criteria
• Operating
Speed
• Free flow
Speed
• Running
Speed
• Average
Speed
Operating
speed
Free flow
condition
Key Role
for
controlling
Geometric
Design
Introduction
4
Spot Speed
» Instantaneous speed of a vehicle
» Calculated using time required to
pass a short distance
5
Project Background
» To determine the appropriate locations for modifying speed
limit regulations
» Speed-profile models can be introduced
» Obtaining driver attitudes and behaviors
» Shows impact in roadway capacity
6
Study Area
» Panthapath
» Latitude: 23045’03” N
» Longitude: 90023’18” E
»
Procedure 7
Selected a 80-ft straight and level stretch of road with free-flowing traffic
Divided into two teams stationed 80-ft apart to time vehicles
Observed six types of vehicles: Motorbikes, Cars, CNGs, Pickup Van,Rickshaw
& Bicycle
Used a stopwatch or timer to record the time it took for each vehicle to travel
80-ft
Repeated the process for several vehicles of each type and calculated the
mean time for each vehicle
Divided the length of the road segment (80-ft) by the mean time of each
vehicle to calculate the operating speed
Data Collection 8
Private Car 5 80 5.06 15.81 24.27
15.22
80 2.72 29.41
80 3.53 22.66
80 3.16 25.32
80 2.84 28.17
CNG 5 80 3.28 24.39 23.93
80 3.28 24.39
80 3.62 22.10
80 2.97 26.94
80 3.66 21.86
Pickup Van 5 80 4.06 19.70 18.76
80 5.32 15.04
80 4.56 17.54
80 3.84 20.83
80 3.87 20.67
Motor Bike 5 80 3.59 22.28 22.32
80 3.38 23.67
80 3.03 26.40
80 3.94 20.30
80 4.22 18.96
Results
» Operating Speed =
∑Number of vehicles ∗Avg. Speed
Total no. of vehicle
» The operating speed for motorized vehicle is 15.22 mph
9
Level of Service - LOS 10
» Term used to describe the quality
provided by a transportation system
or facility
Level of Service - LOS 11
» Forced flow
» Worst condition
LOS F
12
15.22
Motorized
11.84
Motorized and
Non-motorized
8.45
Non-motorized
Discussion
13
Conclusion
» Introduce traffic calming measures
» Significant delay and congestion
» Highly undesirable and inefficient
» Levels of Service for Road Transportation | The Geography of Transport
Systems (transportgeography.org)
» Microsoft Word - LOS Definitions.doc (virginiadot.org) Microsoft Word -
LOS Definitions.doc (virginiadot.org)
14
Reference
15
Thank you!
Any questions?

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CE-354-Group-3-Slides.pptx

  • 2. ROADMAP 2 1 3 5 6 4 2 Introduction Methodology Discussion Objective & Background Result Conclusion
  • 3. Fundament al Design Criteria • Operating Speed • Free flow Speed • Running Speed • Average Speed Operating speed Free flow condition Key Role for controlling Geometric Design Introduction
  • 4. 4 Spot Speed » Instantaneous speed of a vehicle » Calculated using time required to pass a short distance
  • 5. 5 Project Background » To determine the appropriate locations for modifying speed limit regulations » Speed-profile models can be introduced » Obtaining driver attitudes and behaviors » Shows impact in roadway capacity
  • 6. 6 Study Area » Panthapath » Latitude: 23045’03” N » Longitude: 90023’18” E »
  • 7. Procedure 7 Selected a 80-ft straight and level stretch of road with free-flowing traffic Divided into two teams stationed 80-ft apart to time vehicles Observed six types of vehicles: Motorbikes, Cars, CNGs, Pickup Van,Rickshaw & Bicycle Used a stopwatch or timer to record the time it took for each vehicle to travel 80-ft Repeated the process for several vehicles of each type and calculated the mean time for each vehicle Divided the length of the road segment (80-ft) by the mean time of each vehicle to calculate the operating speed
  • 8. Data Collection 8 Private Car 5 80 5.06 15.81 24.27 15.22 80 2.72 29.41 80 3.53 22.66 80 3.16 25.32 80 2.84 28.17 CNG 5 80 3.28 24.39 23.93 80 3.28 24.39 80 3.62 22.10 80 2.97 26.94 80 3.66 21.86 Pickup Van 5 80 4.06 19.70 18.76 80 5.32 15.04 80 4.56 17.54 80 3.84 20.83 80 3.87 20.67 Motor Bike 5 80 3.59 22.28 22.32 80 3.38 23.67 80 3.03 26.40 80 3.94 20.30 80 4.22 18.96
  • 9. Results » Operating Speed = ∑Number of vehicles ∗Avg. Speed Total no. of vehicle » The operating speed for motorized vehicle is 15.22 mph 9
  • 10. Level of Service - LOS 10 » Term used to describe the quality provided by a transportation system or facility
  • 11. Level of Service - LOS 11 » Forced flow » Worst condition LOS F
  • 13. 13 Conclusion » Introduce traffic calming measures » Significant delay and congestion » Highly undesirable and inefficient
  • 14. » Levels of Service for Road Transportation | The Geography of Transport Systems (transportgeography.org) » Microsoft Word - LOS Definitions.doc (virginiadot.org) Microsoft Word - LOS Definitions.doc (virginiadot.org) 14 Reference