Variable speed limit control for steady and oscillatory queues at fixed freeway bottlenecks

摘要: New variable speed limit (VSL) schemes are developed based on the Kinematic Wave theory to increase freeway bottleneck discharge rates under two scenarios: (i) steady queue and (ii) oscillatory queue. The key principle is impose VSL control some distance upstream of a starve inflow dissipate Once near vanishes, another less restrictive imposed resolve heavy generated by first regulate sustain stable maximum rate prevent traffic breakdown. Several strategies for each scenario ranging from simplest strategy that maximizes delay saving more sophisticated management. An analysis model parameters suggests wide range (to clear around bottleneck) can be realize significant savings.