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This document describes a laboratory activity for a Highway Engineering course involving a running speed study. Students will use a moving vehicle technique to collect travel time and delay data along a test route.
LAB 2 - Running Speed (Method 1) OEL 1 - Free download as PDF File (.pdf), Text File (.txt) or read online for free.
In this laboratory activity, a distance of 0.5 km between two points at particular location is chosen and a time for a vehicle passing through from first point to another point is recorded. The running speed is measured by dividing the distance passing through with the time taken.
This lab experiment measured the running speed along a 6.7km route using a moving vehicle technique. Data on travel times, delays, and traffic volumes were collected during trips in both the eastward and westward directions.
Calculate Vehicle Speeds To calculate vehicle speed, use the predetermined study length and the elapsed time it took the vehicle to move through the course (as recorded on the stopwatch data form) in the following formula (Robertson 1994): V = T D 1.47, (2.2) where V = spot speed (mph), D = length (feet), and T = elapsed time (seconds). In the ...
Speed data is needed for a variety of traffic analyses. Spot speed data refers to measurement of individual speeds of vehicles passing a point on a roadway. Care must be taken to conduct the study appropriately so that the sample data will adequately reflect speed characteristics of the population.
Spot Speed Study Purposes: Establishing the speed zone of new or existing speed limit or enforcement practices. To determine speeds at the problem locations; to validate whether speeds are too high. For traffic operation and control; to establish speed limits. to determine safe speeds at curves.
