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Traffic Data Selection: An Evaluation Of Siting Criteria For Permanent Traffic Recorders, Richard Ledbetter, Kenneth Dueker, Milan Krukar, Vern Tabery

Center for Urban Studies Publications and Reports

Traffic volume data are needed for design and construction zone traffic management. In addition, continuous traffic volume data (collected by automatic traffic recorders) is needed to factor short counts (24 hours or more) collected at key sites on the states highway network.

This study evaluates the procedures used by the Oregon Department of Transportation for collecting continuous traffic volume data to determine: (1) if the current location and number of automatic traffic recorders (ATRs) on Oregon's highway network is adequate for estimating monthly seasonal factors, and (2) if the current procedure of using group means, based on geographical regions, to …