Control Priorities of Coordinated OnRamps Metering Based on Quantitative Hierarchical Model

Abstract:

To alleviate the traffic congestion problems on urban freeways, a method is proposed to determine the control priorities of coordinated onramps metering of urban freeways using the risk assessment techniques and the QHM(quantitative hierarchical model) to classify a freeway corridor into subsections. The priority matrix is constituted by the density ratio of the current status of the subsections over the critical status and is used for the determination of control priorities of multiramps of freeway corridors. It can ensure the smoothness, fairness and consistency among subsections. Finally, the reliability and the feasibility of the proposed model is verified by the case using the Vissim simulation.