摘要
为了分析不同情况下得到时间占有率对推算延误的敏感性,首先对前期研究的使用占有率推算信号交叉口引道延误的方法进行了回顾,考虑实际检测器设置场景,对不同比例的公交混合率,不同的检测器设置密度等情况,借助于微观交通仿真场景,对信号交叉口延误参数提取敏感性进行了分析,结果表明:公交比例为10%,15%,20%时,参数提取误差分别为20.84%,30.17%和22.91%;同样,检测器设置间隔为10米时,参数提取误差为17.38%,三组检测器时,参数提取的误差为32.15%,两组检测器设置时,参数提取的误差为23.77%,说明检测器设置间隔比公交车混合率对参数提取的精度影响大.
In order to analysis the sensitive of the delay deducing through time occupancy, the previous research that extracting delay through time occupancy has been reviewed firstly Considering the real traffic detector setting condition, different bus mix ratio and different detector setting distance the delay parameter extracting sensitivity is analyzed through micro- simulation platform. It is proved that the delay＇s MAPE is 20.84% 30.17% and 22.91% when the bus mix-ratio is 10% 15% and 20%. Also, the MAPE is 17.38% when the detector setting distance is 10m; the error is 32.15% when there are 3 detectors, and 23.77% error when there are two detectors. It can illustrate that the detector setting distance has more sensitive influence than bus mix-ratio.
出处
《数学的实践与认识》
北大核心
2015年第16期55-61,共7页
Mathematics in Practice and Theory
基金
国家山区公路工程技术研究中心开放基金课题(gsgzj-2013-06)
山地城市交通系统与安全重庆市重点实验室开放基金(KTSS201205)
关键词
信号交叉口
时间占有率
延误
敏感性分析
仿真
signalized intersection
time occupancy
delay
sensitivity analysis
simulation
