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Alternative Title:Acoustic Traffic Detection and Classification System, Phase 2
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Edition:Final Report: September 1987 - November 1990
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Abstract:The need for new instrumentation to sense, classify, and control increasing traffic flows has been evident for several years. In some cases, older technology (ACRS for example) has proven inadequate for projects such as counting vehicles crossing rural bridges, owing to the adverse conditions in which the instrumentation must operate. Currently available counting and/or classification systems generally require deployment on or under the road surface and are subject to many hazards. What is needed is a simple, accurate, and inexpensive system that can be deployed at the side of roadways and easily be moved from location to location. The purpose of this study was to explore acoustics and modern signal processing as a technique for counting and possibly classifying traffic on rural, state, and interstate highway systems. The objectives of this research were to: I. Develop an alternative to the commonly used rubber hose traffic counting system (ACR) for deployment on rural roadways; and II. Investigate the possibility of using acoustic signals from moving traffic as a basis for a new instrument for counting and possibly classifying vehicles.
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