Study on Interval Optimal Control Method for Ramp’s Merging Areas in Urban Expressway

Abstract

How to solve the problem of urban expressway traffic congestion is an urgent problem for the government and the transportation department. Ramp's merging areas, as the interaction link between internal and external traffic of expressway system, is the main research object of this paper. Taking Hangzhou Qiushi expressway on the road section of the entrance ramp as the target section , the interval optimal control model considering vehicle speed, time occupancy and vehicle spacing as interval variables is proposed, and the single dynamic adjustment algorithm of onramp is given.