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This Travel Time Data Collection Handbook provides guidance to transportation professionals and practitioners for the collection, reduction, and presentation of travel time data. The handbook should be a useful reference for designing travel time data collection efforts and systems, performing travel time studies, and reducing and presentingtravel time data. Agencies new to travel time data collection may wish to adopt sections of the handbookas standard procedures, whereas agencies with data collection experience may wish to incorporate specific details or criteria. Initial chapters of the handbook describe how to design data collection activities, including the determination of parameters such as study size and scope, data collection technique, and other critical study elements. Chapters 3 through 6 include a description of each data collection technique, major advantages and disadvantages, cost and equipment requirements, and step-by-step instructions. Related experience with the data collection techniques is included for examples of applications. Chapter 7 provides guidance for reducing travel time data and preparing tabular and graphical presentations.This information is then converted to travel time, speed, and delay for each segment along the survey route. ... ITS probe vehicle techniques are discussed in Chapter 5. This chapter describes three levels of instrumentation used to measure travel time with a test vehicle: a€c Manual - manually recording elapsed ... time along a corridor based upon speed and distance information provided by an electronic DMI connected to the transmission of the test vehicle; ... chap3.pdf TEST VEHICLE.

Author: US Department of Transportation
Publisher:Maroon Ebooks - 2015-01-27

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