Combined optimization of lane-based control and signal timing at parallel flow intersection
A combined optimization method for lane control and signal timing was proposed in order to enhance the flexibility of parallel flow intersections in practical application.Sixteen configurations including one-way,asymmetric two-way,symmetric two-way,three-way,and four-way settings with directional arrangements were integrated into an optimization model,and phase sequences were automatically generated by modifying the traffic conflict matrix.A mixed integer linear programming model was developed to optimize the intersection setting selection,lane allocation,and signal timing in combination.Results show that the symmetric two-way,three-way,and four-way settings increase traffic capacity by approximately 20%,20%,and 50%respectively compared to conventional intersections under various traffic scenarios.The capacities of the one-way and asymmetric two-way settings are close to those of conventional intersections,indicating that one-way and asymmetric two-way settings are not suitable for parallel flow intersections.The four-way setting exhibits the largest increase in capacity,with a maximum improvement of 70.51%.The traffic capacities of symmetric two-way and three-way settings are similar,while the three-way setting performs better in asymmetric traffic scenarios than the symmetric two-way setting.
traffic engineeringcontrol methodmixed integer linear programmingparallel flow intersectiondisplaced left-turn