Vehicle Classes for Pavement Design and Capacity Analysis
Publication: Journal of Transportation Engineering
Volume 112, Issue 6
Abstract
Transportation engineers working in Colorado were aware of a lack of published data at both the local and national level for vehicle classes on urban streets. Such vehicle class breakdowns are necessary for calculating equivalent daily loaded axle (EDLA) values for pavement design and conducting capacity analyses. A technical committee was formed to collect and analyze weekday vehicle class data on urban streets of various types. The major vehicle classes are passenger cars (70–75%), pickups (15–20%), single unit trucks (5–7%); tractor‐trailers, buses, and recreational vehicles account for less than 1%. Using these data, a microcomputer spread sheet was set up to calculate EDLA values for pavement design for a range of design year volumes. This vehicle class data is also very useful in highway capacity calculations.
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References
1.
AASHTO Road Test, American Association of State Highway and Transportation Officials, 1962.
2.
Judson, M., and Dean, A. G., “Vehicle Classification Procedure Study,” Arizona Department of Transportation, Phoenix, Ariz., June, 1984.
3.
Lalani, N., O'Connell, R., Kubala, J., Petersen, C., “Vehicle Classification Study for Urban Streets,” Colorado/Wyoming Section Technical Committee Report, Lakewood, Colo., Aug., 1985.
4.
Highway Capacity Manual, Transportation Research Board, Washington, D.C., Jan., 1985.
5.
Roadway Design Manual, Colorado Department of Highways, Denver, Colo., Jan., 1980.
6.
Supercalc 3, SORCIM/IUS Microsoftware, Aug., 1984.
7.
Thickness Design—Asphalt Pavements for Highways and Streets, Manual Series No. 1 (MS‐1), The Asphalt Institute, Sept., 1981.
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Copyright © 1986 ASCE.
History
Published online: Nov 1, 1986
Published in print: Nov 1986
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