论文标题
公交速度波动率作为替代措施的运输信号优先级的安全评估：明尼苏达州的案例研究
Safety Evaluation of Transit Signal Priority with Bus Speed Volatility as a Surrogate Measure: Case Study in Minnesota
论文作者
论文摘要
先前的研究发现，运输信号优先级（TSP）的实施与崩溃数量减少之间的相关性。为了进一步了解TSP如何影响交通安全，使用详细的总线自动车辆位置（AVL）数据进行了更深入的评估。该数据来自明尼阿波利斯圣保罗地铁公交公路5，在2019年初，在30个信号交叉路口实施了TSP。使用替代安全措施，即公交速度波动率（BSV）来估计TSP的安全效应，其BSV较高的BSV表明安全风险更高。对23,123个事件级观测进行了回归分析，并将事件定义为配备TSP的交叉路口的总线遍历。结果表明，通过TSP请求，BSV明显低于没有TSP请求的情况，这证实了TSP在平滑巴士旅行中的有效性，从而降低了总线碰撞和乘客跌倒的风险。
Previous studies have found correlations between the implementation of transit signal priority (TSP) and the reduction in number of crashes. To further understand how TSP affects traffic safety, a more in-depth evaluation was carried out using detailed bus automatic vehicle location (AVL) data. The data was from Minneapolis-Saint Paul Metro Transit Bus Route 5, where TSP was implemented at 30 signalized intersections in early 2019. A surrogate safety measure, bus speed volatility (BSV), was used to estimate the safety effects of TSP, with a higher BSV indicating more safety risks. A regression analysis was carried out on 23,123 event-level observations, with event defined as a bus traversal of a TSP-equipped intersection. Results indicate that with a TSP request, BSV was significantly lower than without a TSP request, confirming the effectiveness of TSP in smoothing bus trips through intersections, thus reducing risks of bus collisions and passenger fall-overs.
