[1]张驰,宁子尧,张敏,等.高速公路互通立交交织段硬路肩开放策略[J].长安大学学报(自然科学版),2026,46(2):106-116.[doi:10.19721/j.cnki.1671-8879.2026.02.008]
　ZHANG Chi,NING Zi-yao,ZHANG Min,et al.Hard shoulder opening strategy for weaving sections of expressway interchanges[J].Journal of Chang’an University (Natural Science Edition),2026,46(2):106-116.[doi:10.19721/j.cnki.1671-8879.2026.02.008]
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高速公路互通立交交织段硬路肩开放策略()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第46卷
期数:
2026年2期
页码:
106-116
栏目:
交通工程
出版日期:
2026-04-18

文章信息/Info

Title:
Hard shoulder opening strategy for weaving sections of expressway interchanges
文章编号:
1671-8879(2026)02-0106-11
作者:
张驰1; 宁子尧1; 张敏2; 宋金明1; 国廷玉1
(1. 长安大学 公路学院,陕西 西安 710064; 2. 长安大学 运输工程学院,陕西 西安 710064)
Author(s):
ZHANG Chi1;  NING Zi-yao1;  ZHANG Min2;  SONG Jin-ming1;  GUO Ting-yu1
(1. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 2. School of Transportation Engineering, Chang'an University, Xi'an 710064, Shaanxi, China)
关键词:
交通工程;  硬路肩开放;  核密度估计;  交织区;  无人机航拍
Keywords:
traffic engineering;  hard shoulder opening;  KDE;  interchange area;  UAV
分类号:
U491
DOI:
10.19721/j.cnki.1671-8879.2026.02.008
文献标志码:
A
摘要:
为缓解高峰期间绕城高速公路互通立交交织区的拥堵与安全风险,聚焦硬路肩临时开放策略的安全性与通行效率影响,在定量评估的基础上提出决策建议。利用无人机航拍获取包含主线与匝道全视角的高分辨率车辆轨迹视频,通过DataFromSky 视觉识别软件自动提取车辆路径,并进行数据坐标转换处理,统一度量各车道车辆的运动特征。在此基础上,引入改进的事故时间指数(ITA)以增强对速度差异情境的敏感性,并采用核密度估计方法对车辆合流、分流点进行空间聚类,对比分析硬路肩关闭与开放2种工况下的风险分布。研究结果表明:在硬路肩未开放时,交织区潜在冲突集中于主线内侧一、二车道,风险峰值高达1.8×10-3; 启用硬路肩后,风险热点向外侧车道及硬路肩转移,峰值降至7.0×10-4,主线内侧车道风险显著减小,但当匝道与主线流量比超过0.25或匝道与三车道流量比高于1时,外侧车道和硬路肩容易形成新的拥堵与冲突集聚; 核密度与ITA结果高度相关,揭示了外侧车速差异大和频繁换道是高风险区出现的主要原因; 基于流量比阈值划分,提出按匝道与主线或三车道流量比分段控制硬路肩启闭的策略,并建议配合限速、车道引导等措施,指导在不同流量状态下合理动态开放硬路肩,为城市绕城高速的交通安全管理和效率提升提供科学依据。
Abstract:
To alleviate congestion and safety risks in weaving sections of ring expressway interchanges during peak periods, a quantitative evaluation was carried out to examine the safety and efficiency impacts of temporarily opening the hard shoulder, and decision making recommendations were derived. High resolution vehicle trajectory videos covering the mainline and ramps were obtained by using unmanned aerial vehicles(UAVs). Vehicle paths were automatically extracted via the DataFromSky vision recognition software, and the trajectory data were transformed into a Frenet coordinate system to standardize the motion characteristics across lanes. On this basis, a modified incident time analysis(ITA)index was introduced to enhance sensitivity to speed difference scenarios, and kernel density estimation(KDE)was employed to cluster the spatial distribution of merging and diverging points, so that risk distributions under hard shoulder closed and hard shoulder open conditions were compared. The results show that when the hard shoulder is closed, potential conflicts in the weaving area are concentrated on the first and second inner lanes of the mainline, with risk peaks up to 1.8×10-3, After the hard shoulder is opened, risk hots pots shift toward the outer lane and shoulder, the peak decreases to 7.0×10-4 and the risk on the inner lanes significantly reduces. But when the ramp to mainline flow ratio exceeds 0.25 or the ramp to three lane flow ratio exceeds 1.0, new clusters of congestion and conflicts tend to form on the outer lane and hard shoulder. In addition, the kernel density and ITA results are highly correlated, revealing that large speed difference and frequent lane change in the outer lane are the main reasons for the occurrence of high risk areas. Based on flow ratio thresholds, a segmented control strategy was proposed to open or close the hard shoulder according to the ramp to mainline or ramp to three lane flow ratios. It is suggested that such control should be coordinated with speed limits and lane guidance measures, providing a scientific basis for dynamically opening the hard shoulder under different traffic conditions and improving traffic safety and efficiency on ring expressways.1 tab, 7 figs, 35 refs.

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备注/Memo

备注/Memo:
收稿日期:2025-08-22
基金项目:国家重点研发计划项目(2020YFC1512005); 四川省科技计划项目(2022YFG0048); 陕西省社会科学基金项目(2025R018)
作者简介:张 驰(1981-),男,四川宜宾人,教授,工学博士,从事公路路线安全研究,E-mail:zhangchi@chd.edu.cn。
更新日期/Last Update: 2026-04-20