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原文传递 Integration of Off-ramp and Arterial Signal Controls to Minimize the Recurrent Congestion on the I-495 Capital Beltway.

题名：	Integration of Off-ramp and Arterial Signal Controls to Minimize the Recurrent Congestion on the I-495 Capital Beltway.
作者：	Chang, G.; Li, Z.
关键词：	Arterial Highways; Electronic Traffic Control; Freeways; Highway Capacity; Intersections; Interstate 495 Highway; Optimization; Ramps; Traffic Congestion; Traffic Signals; Travel Delay
摘要：	This study developed an integrated control model to contend with the impact of off-ramp queue spillback on both the freeway and arterials within the interchange control boundaries. The entire control system consists of two levels that compute the optimally coordinated signal strategies for intersections and off-ramps. Whereas the first level primarily handles oversaturated flows and blockage between lanes at congested intersections, the second level deals with the freeway mainline delays caused by the excessive off-ramp queue spillback; these components work together to produce the optimal systemwide signal and ramp control plans. In addition to developing control modules for oversaturated arterials and excessive off-ramp queues, the study also conducted experimental analyses using field data from the interchange between I-495 and Georgia Avenue. The experimental results indicate that, by accounting for how off-ramp queues impact delays of both freeway and arterial traffic, the integrated interchange control system can yield the best use of a roadway's overall capacity and prevent the formation of freeway queues in the interchange area caused by the overflow of off-ramp traffic.
报告类型：	科技报告