基于公交优先度的多申请公交优先策略研究

A Transit Signal Priority Strategy for Multiple Bus Requests Based on Bus Priority Degree

针对我国公交线路多,高峰时公交车流率比较大的特点,提出基于公交优先度的多申请公交优先策略,用以解决高峰时多相多申请公交优先的问题。在该策略中,建立了新的公交优先度模型,用以量化公交优先的程度。进而根据交叉口实时信息,提出绿灯终止条件和红灯早断条件优化信号配时。并以一个快速公交路口为例,基于VISSIM二次开发仿真平台,与无公交优先策略和先到先服务的优先策略对比,验证文章提出策略的有效性。结果表明:当公交车流量较大时,文章提出的策略明显优于无公交优先策略和先到先服务的策略。公交车流量越大,该策略的优势越明显。

Since there are a lot of buses and the transit flow rate is very big in China, this paper proposed a transit signal priority strategy for muhiple bus requests based on bus priority degree in order to settle the conflicts among bus requests of multiple phases during peak period. In this strategy, the bus priority degree index was improved to quantify the degree of bus priority. Furthermore, this method could figure out cor- responding green-extension and red-truncation strategy accord- ing to real time vehicle information to optimize the signal timing. A VISSIM-based simulation platform was designed and a BRT intersection was used to evaluate and compare the proposed strategy with no priority and first-come-first-serve strategy. The results show that the proposed strategy outper- forms no priority and first-come-first-serve strategy when intersection has big transit flow. With transit flow getting bigger, the advantage of proposed strategy became more and more apparent.