00494463

Component

http://onlinepubs.trb.org...trr/1989/1215/1215-020.pdf

https://scholar.google.co...uang&publication_year=1989

The counting and classification of vehicles is an important part of transportation engineering. In the past 20 years many automated systems have been developed to accomplish that labor-intensive task. Unfortunately, most of those systems are characterized by inaccurate detection systems and/or classification methods that result in many classification errors, thus limiting the accuracy of the system. This report describes the development of a new vehicle classification database and computer program, originally designed for use in the Two-Point-Time-Ratio method of vehicle classification, which greatly improves the accuracy of automated classification systems. The program utilizes information provided by either vehicle detection sensors or the program user to determine the velocity, number of axles, and axle spacings of a passing vehicle. It then matches the axle numbers and spacings with one of thirty-one possible vehicle classifications and prints the vehicle class, speed, and wheelbase lengths. It also tabulates and prints totals and average speeds for each vehicle type. This paper describes the database built and utilized, as well as a roadside experiment conducted to test the accuracy of the database and the classification program, showing the classifications to be highly accurate.

This paper appears in Transportation Research Record No. 1215, Pavement Management and Rehabilitation. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01414065

p. 178-188

1989

Transportation Research Record

0309048192

Figures (3) ; References (7) ; Tables (3)

Accuracy; Automation; Axles; Computer programs; Databases; Field tests; Spacing; Vehicle classification; Velocity

Axle spacing

Highways; Pavements; I23: Properties of Road Surfaces

TRIS, TRB, ATRI

May 31 1990 12:00AM

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