Lec 9 ch4 pp 115 121 travel time and delay studies
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Lec 9, Ch4, pp.115-121: Travel time and delay studies. Know how travel time and delay study results can be applied Know definition of terms related to travel time and delay studies Know what types of travel time studies are available

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Lec 9 ch4 pp 115 121 travel time and delay studies l.jpg
Lec 9, Ch4, pp.115-121: Travel time and delay studies

  • Know how travel time and delay study results can be applied

  • Know definition of terms related to travel time and delay studies

  • Know what types of travel time studies are available

  • Understand how the moving-vehicle technique is conducted and its data reduced


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What we cover in class today…

  • What are travel time and delay studies

  • How are they used?

  • Definition of terms

  • Methods requiring a test vehicle

  • Methods not requiring a test vehicle

  • Learn how to reduce data collected by the Moving-Vehicle technique


Travel time and delay studies l.jpg
Travel time and delay studies

* Determines the amount of time required to travel from one point to another on a given route. Often, information may also be collected on the locations, durations, and causes of delays

  • Indicate the level of service

  • Identify problem locations


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Applications of travel time and delay data

Many uses…

Efficiency check

Collection of rating data

Problem location identification

Model calibration

Evaluation of performance before and after improvement

Collect data for economic analysis (user costs)

See page 116



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Methods

Methods requiring a test vehicle:

West

X

Y

Y

X

East


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Methods (cont)

Methods not requiring a test vehicle:

License-plate method NG for a grid network – too many routes

Use of ETC for freeways


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Moving-vehicle technique

West

X

Y

Y

X

East

Volumes

Average travel times

(Review Example 4-6)


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