摘要：AbstractDuring the rush hours there always happens a spillback between upstream intersection and downstream intersection. The spillback may lead to deadlock, then a heavy traffic congestion happens. Based on coordinate control, the paper focuses on studying the offset between the adjacent intersections when it is saturated. Firstly, the paper studies the flow rate during a green phase and finds the differences between unsaturated and saturated. Then based on the differences, the paper studies the formation of the residual queue in every cycle when it is saturated and gives a model to calculate it. Further more, the paper also studies the relationship between residual queue and offset. So a dynamic control strategy is proposed to cope with the saturated traffic flow. At the end, a simulation experiment is conducted to test the proposed strategy.
关键词：saturated;through-put;residual queue;offset;wave theory
