Abstract At signalised intersections, the mixed traffic flow is converted to corresponding car flow using a passenger car unit. Earlier studies showed that PCU value is not static but depends on the interaction of vehicles for a particular traffic stream. This study suggests a methodology to find the PCU value at urban signalised intersections based on the PCU value obtained by time occupancy method during the saturation condition with varying interaction between the vehicles. For the analysis, traffic data have been collected with the help of videography at Ahmedabad and Surat, Gujarat. Traffic flow discharge and clearance time of different vehicular categories have been extracted from the video during the saturated green time. The variation in PCU values with respect to traffic composition and discharge rate is carried out in this study. Regression-based PCU models are developed to estimate the PCUs for different category of vehicles considering the traffic flow and compositions. Further, a stream equivalency factor has been developed to convert the heterogeneous traffic into homogeneous traffic without making use of PCU values.
Modelling Dynamic PCUs Using Occupancy Time Approach at Urban Signalised Intersections Under Mixed Traffic Conditions
2019-10-25
11 pages
Article/Chapter (Book)
Electronic Resource
English
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