Coordination control of entrance ramp metering and upstream signal control based on CPN

Mixed-control algorithm only considers about freeways and ramp without the coordination with upstream intersections of side roads, which will result the jam on the upstream intersections of side roads. Therefore, this article has proposed an improved control algorithm of coordination of entrance ramp metering, freeways and upstream intersection of side roads based on the Mixed-control. The article has simulated this algorithm using CPN, and has proved the effectiveness of the algorithm through simulating the real road network by VISSIM.