摘要
设置有路中式公交专用道的交叉口进口道存在因公交与其他车辆两股平行车流在路口同时左转、直行和右转而形成的多路交织现象,传统信号控制方案已无法消除这类交叉口相位放行造成的交织冲突问题。为解决该问题,设计了一种借用公交专用道左转的新型交叉口,规定了各流向车辆的运行规则,同时设计了主信号与预信号相位方案及相互协调配时关系。具体来说,根据公交直行车辆和其他左转、直行车辆的到达-驶离图式,分别建立各流向不同情况下车辆的延误与停车次数计算方法,以交叉口车均延误与车均停车次数加权的当量费用最小为目标,建立交叉口信号配时优化模型。为验证该优化控制策略的有效性,结合算例对传统控制方案和优化控制方案进行比较,并分析等待区长度对车辆排队演化过程的影响,确定优化方案适用场景。结果表明:相对于传统方案,优化方案增加了交叉口的通行能力,使得车均当量费用下降比例达到了32.3%;参数灵敏度分析显示,主信号等待区长度宜设置为80 m。所提出的控制策略通过借用公交专用道左转,提高了交叉口的利用效率,最大限度地降低了对公交优先策略实施的影响,能够完全消除设置有路中式公交专用道交叉口相位放行中的交通交织冲突现象,以保证交叉口行车安全。
In an intersection with a median-road bus lane,there exists a multiple interweaving phenomenon due to the parallel traffic flow of buses and other vehicles that turn left,go straight,or turn right at the intersection.However,traditional signal control schemes have not been able to solve the interweaving conflicting problem caused by phase release at this intersection.To solve the problems,this study proposes a new type of intersection that utilizes the bus lane for the left turn,defines operational rules for traffic flow,and designs the phase scheme and mutual coordination timing relationship between the main signal and the pre-signal.Based on the arrivaldeparture diagram of the left-turning and straight-going other vehicles,and straight-going bus vehicles,a method was proposed for calculating the delay and number of stops of the vehicles in different situations,and an intersection signal timing optimization model was established to minimize the equivalent cost of the average delay and number of stops.To verify the effectiveness of the optimization control strategy,a comparison of the traditional control scheme and the optimized control scheme with specific cases was performed,and the influence of the waiting zone length on the vehicle queuing evolution process was analyzed and the applicable situation was determined.The results demonstrate that in comparison with the traditional scheme,the capacity of the optimized intersection increases,and average equivalent cost of the vehicle decreases by 32.3% under the control of the optimized scheme.The parameter sensitivity analysis demonstrates that the length of the main signal waiting zone should be set to 80 m.By sharing the median-road bus lane,the control strategy provided by this study could improve the efficiency of the intersection,minimize the impact of the bus priority strategy,completely eliminate the multiple interweaving phenomenon in the intersection with a median-road bus lane,and ensure the safety of traffic at the intersection.
作者
安实
宋浪
王健
王雅晴
胡晓伟
AN Shi;SONG Lang;WANG Jian;WANG Ya-qing;HU Xiao wei(School of Transportation Science and Engineering,Harbin Institute of Technology,Harbin 150090,Heilongjiang,China)
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2020年第4期115-125,共11页
China Journal of Highway and Transport
基金
国家自然科学基金项目(51578199)。
关键词
交通工程
信号配时
理论分析
左转交叉口
公交专用道
车均当量费用
traffic engineering
signal timing
theoretical analysis
left turn intersection
bus lanes
average equivalent cost
