Optimization Model of Dynamic Lane Assignment for Isolated Signalized Intersections

Abstract:

In order to deal with the significant variety of the relationship between the supply and demand of the signalized intersection, the method to allocate the lane-use dynamically was discussed. Based on the analysis of the optimization objective, optimization variables and the optimization model, a dynamic lane assignment optimal method was proposed based on the approach-group concept. The method was formulated as an Integer-Non-Linear-Programming model. Minimizing the sum of the critical flow ratio was the most important design objective. By means of numerical examples, the accuracy and the computation time of the method were tested. Results show that the approach-group concept could reduce the number of control variables significantly without reducing the accuracy of the optimization results and the proposed model could achieve the goal of real-time dynamic lane assignment control.