FREEWAY CONTROL SYSTEMS FOR USING SECTION-RELATED TRAFFIC VARIABLE DETECTION

Abstract

Traffic control systems for freeways are described which use section-related traffic variable measurement techniques. For deriving section-related variables feature sequence of a vehicle series of one measurement site is correlated with the feature sequence of the adjacent measurement site. As features signature characteristics of the inductive loop detuning curve are used. The evaluation unit for feature extraction is implemented on a VME-bus master CPU. Practical experiences which are reported from a traffic control system on the freeway B14 between Fellbach and Stuttgart show a more reliable and quicker automatic incident detection in comparison with local measurement techniques.