Model of Work Zone Capacity of Reconstructed Expressway

Capacity analysis is the only way to formulate traffic organization schemes and evaluate the pros and cons on the work zones of reconstructed expressway. Currently, the lack of work zone capacity modeling and evaluation systems has led to the risk of traffic organization plan failure, which will cause congestion, traffic accidents, and public discontent. First, based on construction zone surveys, the paper defined ten basic forms of reconstructed expressway work zones. Then the basic capacity and adjustment coefficient of several influencing factors, such as the amount and form of lane closed, the median opening length, proportion of trucks, construction work intensity, light condition, and speed limited, were determined based on the measured data and the traffic simulation. Finally, the capacity model was developed to formulate a reasonable construction traffic organization scheme.