• RAVINDRA S. LODH
• PINAKIN N. PATEL
• DR. L. B. ZALA

In order to bring a heterogeneous traffic stream into a homogeneous one consisting of passenger car, the concept of Passenger Car Unit (PCU) factor was introduced. Historically, several methods have been developed for the estimation of PCU values. The present study computed PCU values with area occupancy method for different vehicle categories present at signalized intersections under heterogeneous traffic condition using regression method shows unrealistic PCU values for certain vehicle categories at approaches. Consequently, the study introduced the concept of Stream Equivalency Factor (SEF) to avoid the profound understanding of the PCU estimation. It is a ratio of traffic volume in PCU per hour and volume in vehicles per hour. This factor is related to traffic composition and volume on road through the regression analysis. Multiple linear regression model consists of the flow ratio and percentage of vehicle ratio. For doing so, traffic flow data of some signalized intersections of Ahmedabad is collected using Videography during the peak hours. The data is extracted from the videography with the use of AVIDEMUX software. The PCU values of different vehicles obtained by area occupancy method during the peak hours. This data used for developing SEF model with the use of multiple linear regression technique.

stream equivalency factor, PCU, heterogeneous traffic, area occupancy, signalised intersection

"Estimation of Stream Equivalency Factor at Signalized Intersection Under Mixed traffic conditions in Ahmedabad City ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 4, page no.312-318, April-2019, Available :http://www.jetir.org/papers/JETIR1904P49.pdf

"Estimation of Stream Equivalency Factor at Signalized Intersection Under Mixed traffic conditions in Ahmedabad City ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 4, page no. pp312-318, April-2019, Available at : http://www.jetir.org/papers/JETIR1904P49.pdf