Determination of Passenger Car Unit (PCU) on Bridge and Below Bridge

Estimation of Passenger Car Unit (PCU) values is important for traffic capacity analysis, level of service measures, signal design and coordination, saturation flow rate determination and development of traffic flow models. Due to these wide applications, accuracy of PCU values is considered to have significant influence on traffic flow analysis. This project focus on estimation of PCU values on bridge and below bridge and comparing with IRC 106-1990. For this, site selected is at Sion-Panvel Expressway, Vashi flyover, Vashi Navi Mumbai. PCUs can be estimated from the various methods as given in the literature by using traffic flow data observed in the field. This study used Space occupancy methodology and for cross checking the values Modified methodology for estimation of PCU value of subject vehicles that includes the time headway as influencing parameter. The variations of PCU values with respect to traffic flow and facility type are also studied. . Developed countries devised several methods for calculating PCUs. These PCU values (devised in developed countries) are not suitable for Indian heterogeneous traffic conditions, where traffic is more diverse in nature, and driver do not follow lane discipline. . In mixed traffic situation the traffic movement is an extremely complex phenomenon.