Network performance measure and importance identification: A case study of private car in Zhengzhou city

This study develops the existing measurements on the basis of the EC framework to measure the OD-level and citywide travel efficiency, and proposes a new importance index to further identify the vital OD pairs for network improvement. We conduct both OD-level and citywide efficiency assessments with the private car data in Zhengzhou, China, with different cost units of travel time, travel distance and the integrated unit of PSWE, respectively. Spatial distributions of the most efficient and inefficient OD pairs are illustrated with maps. We also quantify the importance level of each OD pair in the city, and identify the vital OD pairs which encumber the system. It is found that long-distance trips tend to be more efficient, while inefficient trips often happen within the third-ring road of Zhengzhou City. Furthermore, detailed analysis on the vital inefficient OD pairs is also provided, referring to the land use planning of Zhengzhou city.