摘要
为减少信号协调干线事故风险,探究城市干线使用信号协调控制前后道路交通安全水平的变化;采集成都市蜀汉路的干线交通数据,建立基于交通仿真冲突的间接安全评价模型(SSAM);利用核回归拟合仿真交通冲突数,根据拟合结果评价信号协调控制前后干线交通安全水平。结果表明:相较于非信号协调控制,信号协调控制干线在双向干线交通流量小于3 864 pcu/h时,整体安全性能较差;车流中小型车占比过高或过低(P<0. 73或P>0. 83)都会使信号协调干线增加冲突;协调控制干线的直角冲突数更少但追尾冲突数更多。
In order to reduce accidents of signal-coordinated arteries, changes of traffic safety performance before and after adopting coordinated signal control on arteries were explored. Then,with data from Shuhan road in Chengdu collected,SSAM was established based on traffic simulation conflicts.Finally,a kernel regression model was used to fit simulated traffic conflicts,and safety of arteries before and after coordinated signal control was evaluated based on fitting results. The results show that arteries with signal-coordinated control comparatively has worse safety performance when traffic volume is under3 864 pcu/h. There are more conflicts as small cars reach a too high or too low proportion( P<0. 73 or P>0. 83) in traffic flow,and signal-coordinated arteries have fewer crossing conflicts and more rear-end conflicts.
作者
江欣国
任瀚堃
范英飞
李想
付川云
JIANG Xinguo;REN Hankun;FAN Yingfei;LI Xiang;FU Chuanyun(School of Transportation and Logistics,Southwest Jiaotong University,Chengdu Sichuan 611756,China;National United Engineering Laboratory of Integrated and Intelligent Transportation,Chengdu Sichuan 611756,China;National Engineering Laboratory of Integrated Transportation Big Data Application Technology,Chengdu Sichuan 611756,China)
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2020年第3期143-149,共7页
China Safety Science Journal
基金
国家自然科学基金资助(71771191,71801182)
国家留学基金委资助(201907000065)
四川省科技创新人才项目(2019JDRC0023)。
关键词
信号协调干线
交通安全
微观交通仿真
间接安全评价模型(SSAM)
核回归
signal-coordinated arteries
traffic safety
microscopic traffic simulation
surrogate safety assessment model(SSAM)
kernel regression
