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Early in 1987, the values of PCU (Passenger Car Unit) were determined and are still used in Egyptian urban roads, so due to the change in the transport fleet in Egypt, these values are outdated and must be updated. This study investigates estimates of PCU values for twenty different vehicle types using static and dynamic features such as speed, projected vehicle area, traffic volume, and headway. Data is collected from eight urban roads in Cairo using digital video recording and Analyzed by Chandra's Method, Homogenization Coefficient Method, and Time Headway Method. The study finds that new and outdated values of PCU are significantly different because of changes in transport fleets on urban roads in Egypt during the past 36 years. The research set a relationship between PCU values and traffic volume for different vehicle classifications. It is implied that the PCU values obtained from this study should be utilized as a guideline in traffic engineering works in Egypt. Special Issue of AEIC 2024 (Civil Engineering Session)
Tahawy et al. (Mon,) studied this question.