Distribution Characteristics of Headway at Weaving Section of Signalized Intersection Upstream

The headway distribution is a vital foundation for the work of traffic control，capacity calculation，traffic safety analysis, etc．In this paper, based on the analysis of data collected in Shanghai, the statistical features of headway distribution of different road section at the same volume are investigated at weaving section of signalized intersection upstream. The method of χ²−test is adopted to analyze the time headway distribution. The results indicate that in the normal period, headway distributions of three typical sections of the fast lane are fitted well with the negative exponential distribution, and the average headway of the stop line section is the minimum, and the average headway of the weaving section is the maximum. This investigation provides a useful basis for further research on capacity of weaving section of signalized intersection upstream, signalized intersection upstream planning and management.