饱和度约束的单点有限公交优先控制策略

Conditional Bus Signal Priority Strategies Considering Saturation Degree Restriction at Isolated Junction

为减小公交信号优先对社会车辆的影响,在交叉口不发生交通拥堵的前提下,提出了以饱和度为约束条件的公交车有限优先策略,并建立了非优先相位无绿灯时间补偿和有绿灯时间补偿的两种有限公交优先控制策略.用VISSIM软件对比研究了两种有限公交优先策略与无公交优先策略、绝对公交优先策略的效益.结果表明,在所有场景下,与无公交优先策略相比,两种有限公交优先策略的公交车延误平均降低22.9%和15.1%;与绝对优先策略相比,在公交车流量较大或者饱和度较高时,两种有限公交优先策略的社会车辆平均延误减少10.7%和16.5%.

To reduce the negative effect on general traffic caused by bus signal priority（BSP）,a conditional priority methodology that considers the saturation degree restriction in the premise that no traffic congestion occurs at the intersection was brought forward,and two bus signal priority strategies,with or without green time compensation to non-priority phase,were established.The two strategies were tested in the VISSIM environment and compared with non-priority strategy and unconditional BSP strategy.The results show that the two strategies proposed outperform the non-priority strategy by 22.9% and 15.1%,respectively,in reducing the average bus delay in all scenarios,and outperform the unconditional BSP strategy by 10.7% and 16.5%,respectively,in reducing the increase of average vehicle delay in the scenarios with high bus frequency or high saturation degree