摘要
控制长隧道内车辆的超速行驶和速度标准差可以提高交通运行的安全性。由于速度离散度与事故率呈正相关,以车速离散度最小为一级目标函数,平均速度最小为二级目标函数,构建了隧道边缘率LED灯动态控速模型,并利用NSGA-Ⅱ算法对该模型进行求解。以重庆某隧道为研究对象,基于动态控速区间的始、末端断面车速,以标定的动态控速模型为基础进行数值分析,得到各速度区间优化前后断面的车速离散度与平均速度,其中[70,80)、[80,90)和[90,100]这3个速度区间内平均速度分别下降了10.5%、8.3%、6.8%,车速标准差分别降低了16.7%、12.8%、9.4%,整体平均速度和车速标准差分别下降了8.7%和9.2%。结果表明,基于边缘率的动态控速模型,对降低整体车速与车速离散度具有一定效果。
Controlling the overspeed and speed deviation of vehicles in long tunnels improves the safety of traffic operation.Based on the positive correlation between the velocity dispersion and the accident rate,we build a dynamic speed control model of tunnel edge rate LED lamp with the minimum velocity dispersion as the first-order objective function and the minimum average velocity as the second-order objective function.Taking a tunnel in Chongqing as the research object,based on the speed at the beginning and end sections of the dynamic speed control interval and the calibrated dynamic speed control model,we make a numerical analysis to obtain the speed dispersion and average speed of the sections before and after the optimization of each speed interval.Among them,the average speed in the three speed intervals[70,80),[80,90)and[90,100]is down by 10.5%,8.3%and 6.8%.Meanwhile,the standard deviation of speed is cut by 16.7%,12.8%and 9.4%respectively.The overall average speed and standard deviation of speed decreases by 8.7%and 9.2%.Our results show the dynamic speed control model based on edge rate is able to reduce the overall speed and speed dispersion.
作者
刘伟
包宇宁
饶畅
LIU Wei;BAO Yuning;RAO Chang(School of Transportation,Chongqing Jiaotong University,Chongqing 400074,China)
出处
《重庆理工大学学报(自然科学)》
北大核心
2025年第1期111-116,共6页
Journal of Chongqing University of Technology:Natural Science
基金
重庆市建设科技计划项目(20230102)
重庆市交通规划研究院交通运输工程研究生联合培养基地项目(JDLHPYJD2018004)。
关键词
长隧道
边缘率
速度感知
动态控速
车速离散度
long tunnel
edge rate
speed perception
dynamic speed control
speed dispersion
