评估信号交叉路口左转等候区的交通安全性能
Guopeng Zhang1,2, Ying Cai1, Xianghong Hu1
1College of Engineering, Zhejiang Normal University, Jinhua, China.
International journal of injury control and safety promotion
|August 1, 2023
概括
左转等候区 (LWA) 提高了交叉路口的容量,但可能会增加合并冲突. 这项研究使用了交通冲突技术来分析LWA安全性,发现特定因素影响碰撞风险.
科学领域:
- 交通工程是交通工程.
- 道路交通安全 道路交通安全
- 交通运输规划 交通运输规划
背景情况:
- 在中国,越来越多地使用左转等候区 (LWA) 来提高信号交叉路口的容量.
- 然而,LWA对交通安全的综合影响尚未被彻底研究.
- 之前的研究缺乏对冲突类型和与LWA相关的因素的详细分析.
研究的目的:
- 评估LWA结合的信号交叉点的交通安全性能.
- 确定影响交通冲突和潜在碰撞风险的关键因素,在与LWA交叉路口.
- 为开发LWA实施安全对策提供数据驱动的见解.
主要方法:
- 利用交通冲突技术,在实地调查期间收集侵占后时间 (PET) 数据.
- 采用了千平方和两个样本的t测试来比较带有和没有LWA的交叉点之间的冲突分布.
- 应用了一个随机参数顺序逻辑模型来确定影响车辆碰撞风险的因素.
主要成果:
- 与LWA的交叉点显示,合并冲突的流行率更高.
- 在带有LWA和没有LWA的交叉点之间没有观察到PET值的统计学上显著差异.
- 确定的主要影响因素包括左转和接收车道的数量,冲突类型,车辆类型,行驶方向,停车行为和超车.
结论:
- 虽然LWA可能会增加合并冲突,但通过PET测量的整体安全性与没有LWA的交叉路口相当.
- 特定的运营和设计因素显著影响与LWA交叉口发生交通冲突的风险.
- 这些发现支持制定有针对性的安全措施,以减轻风险并确保LWA的安全运行.
相关概念视频
01:29Sight Distance in a Vertical Curve
79
Sight distance on vertical curves is critical in roadway design. It ensures drivers can see far enough ahead to identify and respond to hazards effectively. This directly impacts safety, driver comfort, and the overall efficiency of the transportation network.Vertical curves are classified into crest and sag curves based on their geometry. For crest curves, sight distance is determined by the line of sight between a driver's eye and a small object on the road's surface. Design parameters for...
79
01:24Introduction to Vertical Curves
65
Vertical curves are parabolic transitions that connect different grades on highways and railroads, ensuring a smooth alignment between back and forward tangents. The back tangent represents the initial grade, while the forward tangent defines the subsequent grade. These curves can be symmetrical, with equal tangent lengths, or nonsymmetrical, with varying lengths. The key points defining a vertical curve include the Point of Vertical Intersection (P.V.I.), where the tangents meet; the Point of...
65
01:20Elevation of Intermediate Points on Vertical Curves
52
Vertical curves are essential in roadway design because they provide smooth transitions between varying roadway grades. Designing vertical curves involves calculating intermediate elevations and identifying the curve's highest or lowest point, which is essential for optimal roadway performance.Intermediate elevations on a vertical curve are determined using the tangent offset method. This method considers the initial elevation at the start of the curve, the grades, and the curve's geometry. The...
52
01:28Survey Safety
53
Surveying near highways, rough terrain, or power lines involves significant risks. Working along highways is particularly dangerous and requires the use of warning signs and flagmen. It is safest to avoid working directly on roads and use offsets whenever possible. When highway work is unavoidable, it must follow all safety guidelines. Surveyors should wear bright clothing, such as orange reflective vests, to ensure visibility to motorists, coworkers, and hunters. In construction zones, wearing...
53
01:23Vertical Curve: Problem Solving
97
Vertical curves provide the transition between two roadway grades, ensuring safety, comfort, and functionality. Calculating elevations at specific stations along the curve involves several systematic steps based on the curve's geometry and provided design parameters.The vertical curve is defined by its length, grades, Point of Vertical Intersection (P.V.I.) location, and P.V.I. elevation. The stations of the Point of Vertical Curvature (P.V.C.), where the curve begins, and the Point of Vertical...
97
01:17Design Example: Alignment of a Road Line Using GIS
71
The alignment of a road line using Geographic Information Systems (GIS) is a critical process in civil engineering, combining advanced technology with practical decision-making. This methodology begins with the collection of geospatial data, including information on land cover, geomorphology, drainage patterns, slope, and contour details. Such data is typically acquired through satellite imagery and GIS tools, offering a comprehensive understanding of the terrain.Once the data is gathered, it...
71