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浙江大学学报(工学版)  2023, Vol. 57 Issue (6): 1137-1146    DOI: 10.3785/j.issn.1008-973X.2023.06.009
交通工程     
高速公路行车风险路侧感知系统的设备优化布设
李立1(),平振东2,徐志刚3,*(),汪贵平1
1. 长安大学 电子与控制工程学院,陕西 西安 710064
2. 山东省交通规划设计院集团有限公司,山东 济南 250101
3. 长安大学 信息工程学院,陕西 西安 710064
Devices’ optimal deployment of roadside sensing system for expressway driving risk
Li LI1(),Zhen-dong PING2,Zhi-gang XU3,*(),Gui-ping WANG1
1. School of Electronics and Control Engineering, Chang’an University, Xi’an 710064, China
2. Shandong Provincial Communications Planning and Design Institute Group Limited Company, Jinan 250101, China
3. School of Information Engineering, Chang’an University, Xi’an 710064, China
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摘要:

采用最大信息系数相关性检验遴选行车风险度量指标,提出基于信息熵理论的行车风险多指标度量与融合方法;构建以获取行车风险熵最大为目标,考虑系统建设成本、设备检测范围的路侧感知设备布设优化模型. 基于多车道高速公路车辆行驶轨迹,通过算例获得在不同预算约束条件下的最优路侧设备布设方案,分析设备选型、传统的等间距设备布设方法、原始数据噪声等因素对路侧感知系统获取道路行车风险能力的影响. 结果表明,路侧感知系统建设经费增加与系统行车风险获取能力提升呈现边际效用递减规律,相较于设备数量过多或过少的情况,设置数量适中的路侧感知设备费效比更高,优化后的设备布设方案的费效比比等间距布设方案的费效比高,原始数据测量误差不超过10%不会影响设备优化布设方案的计算结果.

关键词: 高速公路行车风险路侧感知设备优化布设信息熵    
Abstract:

The driving risk measurement indexes were selected based on the correlation test results of maximum information coefficient. A multi-indicator calculation and fusion method for driving risk was designed based on an information entropy theory. An optimal deployment model of roadside sensing devices, aiming to maximize the value of driving risk entropy collected by the devices, was developed which took construction cost and device detection range as constraints. Taking a multi-lane expressway driving trajectory as data, the optimal deployment schemes of roadside sensing devices under different budget constraints was calculated. The factors affecting the capacity of the roadside sensing system to capture the roadway driving risk were analyzed, such as the device type selection, the traditional scheme of uniformly-spaced device deployment, and the original data noise. Results show that the increasing of construction budget of the roadside sensing system and the system’s abilities of sensing driving risk improvement follow the law of diminish marginal effect. Comparing with the situations where there are too many or too few devices, a moderate number of sensing devices has a higher cost-effectiveness ratio. The cost-effectiveness ratio of the optimal device deployment scheme is higher than that of the uniformly-spaced device scheme. Less than 10% original data detection error does not affect the calculation results of the optimal device deployment scheme.

Key words: expressway    driving risk    roadside sensing system    optimal deployment    information entropy
收稿日期: 2022-05-26 出版日期: 2023-06-30
CLC:  U 495  
基金资助: 国家重点研发计划资助项目(2019YFB1600100);国家自然科学基金资助项目(71901040,61973045);陕西省自然科学基础研究计划资助项目(2021JC-28)
通讯作者: 徐志刚     E-mail: lili@chd.edu.cn;xuzhigang@chd.edu.cn
作者简介: 李立(1985—),男,副教授,从事智能交通研究. orcid.org/0000-0002-1963-8587. E-mail: lili@chd.edu.cn
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引用本文:

李立,平振东,徐志刚,汪贵平. 高速公路行车风险路侧感知系统的设备优化布设[J]. 浙江大学学报(工学版), 2023, 57(6): 1137-1146.

Li LI,Zhen-dong PING,Zhi-gang XU,Gui-ping WANG. Devices’ optimal deployment of roadside sensing system for expressway driving risk. Journal of ZheJiang University (Engineering Science), 2023, 57(6): 1137-1146.

链接本文:

https://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2023.06.009        https://www.zjujournals.com/eng/CN/Y2023/V57/I6/1137

类型 名称 含义 累积型指标
时距型 碰撞时间(time-to-collision,TTC) 碰撞车辆以当前速度和相同路径到达碰撞点的时间
暴露碰撞时间(time exposed time-to-collision,TET) 某段时间内TTC值低于阈值(TTC*)的情况下车辆接近前车的时间长度
修正综合碰撞时间(modified time integrated time-to collision,TIT) 碰撞时间曲线的积分
碰撞时间导数(derivative of TTC,TTCD) TTC的导数
后侵入时间(post-encroachment time,PET) 前车车尾与后车车头到达同一位置的时间差
间距型 紧急减速下潜在碰撞指数(potential index for collision with urgent deceleration,PICUD) 前车和后车紧急制动后完全停止时的距离
时间暴露追尾碰撞风险指数(time exposed rear-end crash risk index,TERCRI)[16] 一段时间内前车停止距离小于后车停止距离的时间长度
减速度型 避免碰撞减速率(deceleration rate to avoid a crash,DRAC) 后车及时停车(或与前车的速度相匹配)以避免发生碰撞所需的最小减速度
关键指数函数(criticality index function,CIF) 即将发生冲突的可能性
速度型[17] DeltaS 最小碰撞时间时车速(或轨迹)差异
MaxS 冲突期间(TTC小于阈值)任一车辆的最高速度
表 1  高速公路行车风险替代安全指标分类
图 1  路侧感知设备安装与研究路段
图 2  车辆轨迹的预处理结果
图 3  替代安全指标的相关性检验结果
指标 ω 指标 ω
TTC 0.15 TET 0.13
DRAC 0.14 PET 0.12
CIF 0.14 TERCRI 0.11
TIT 0.07 MaxS 0.14
表 2  替代安全指标的权重
图 4  各车道行车风险熵
图 5  研究路段的行车风险总熵以及车道平均熵
图 6  预算-行车风险熵曲线
图 7  设备数量-行车风险熵变化叠加柱状图
方案 C/万元 N1N2 y1y2/m S
1 24.4 0,5 —,{231,315,399,503,587} 101.99
2 71.52 6,3 {220,286,352,418,484,550},{83,154,616} 251.27
3 90.2 9,1 {89,155,221,287,353,419,485,551,617},{23} 296.29
4 104.28 11,0 {30,96,162,228,294,360,426,492,558,624,678 },— 303.79
表 3  不同预算约束下的路侧感知设备最优布设方案
图 8  2种预算约束下的路侧感知设备布设位置
方案 优化布设 等间距布设1 等间距布设2
C/万元 S C/万元 S C/万元 S
1 24.40 101.99 28.44 93.37 24.40 92.21
2 71.52 251.27 75.84 243.77 48.80 176.71
3 90.20 296.29 94.80 294.72 48.80 176.71
5 48.24 181.16 47.40 161.02 48.80 176.71
表 4  优化布设方案与等间距布设方案对比
C/万元 y1y2/m
原始 Noise=1% Noise=5% Noise=10%
24.40 —,{231,315,399,503,587} —,{230,323,401,500,586} —,{228,315,402,500,587} —,{228,315,399,500,586}
71.52 {220,286,352,418,484,550},{83,154,616} {220,286,352,418,484,550},{71,154,616} {220,286,352,418,484,550},{71,154,616} {221,287,353,419,485,551},{71,155,617}
90.20 {89,155,221,287,353,419,485,551,617},{23} {89,155,221,287,353,419,485,551,617},{23} {89,155,221,287,353,419,485,551,617},{23} {89,155,221,287,353,419,485,551,617},{23}
104.28 {30,96,162,228,294,360,426,492,558,624,678},— {30,96,162,228,294,360,426,492,558,624,678},— {31,97,163,229,295,361,427,493,559,625,678},— {30,96,162,228,294,360,426,492,558,624,678},—
表 5  设备布设方案敏感性分析结果
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