基于PTSU操作的超级多车道左硬肩宽度的研究
Zifan Ni1, Jianxiao Ma1, Tao Lu1
1Nanjing Forestry University, Nanjing, China.
PloS one
|June 23, 2023
概括
兼职肩部使用 (PTSU) 涉及暂时打开左硬肩作为行车道. 这项研究量化了其对驾驶稳定性的影响,确定了最佳的肩宽,以提高交通管理.
科学领域:
- 交通工程是交通工程.
- 道路交通安全问题 道路安全问题
- 车辆动力学 车辆动力学
背景情况:
- 兼职肩部使用 (PTSU) 是一种使用硬肩部作为临时车道的交通管理策略.
- 左硬肩是超级多车道上PTSU的首选,但它们的宽度给需要进入紧急停车道的车辆带来了挑战.
- 了解PTSU对车辆处理的影响对于优化其实施至关重要.
研究的目的:
- 量化左硬肩宽度对PTSU期间车辆在内部车道的驾驶稳定性的影响.
- 通过分析车辆稳定性参数来确定PTSU的最佳左硬肩宽度.
- 为了比较驾驶稳定性与左硬肩对PTSU的打开与其关闭.
主要方法:
- 创建两个虚拟模拟场景:一个为PTSU打开左硬肩,另一个为PTSU关闭.
- 通过驾驶模拟实验收集车辆驾驶数据.
- 使用ANOVA分析车辆操作稳定性,并比较稳定性参数的平均值和标准偏差.
主要成果:
- 该研究确定了左硬肩宽度和车辆驾驶稳定性之间的可量化的关系.
- 发现特定的肩膀宽度在PTSU期间显著影响车辆在内部车道的操控.
- 分析提供了数据,以支持确定最佳的左硬肩宽度.
结论:
- 左硬肩的宽度直接影响PTSU条件下的车辆驾驶稳定性.
- 可以确定最佳的左硬肩宽度,以提高PTSU期间的安全性和效率.
- 这项研究为在多车道高速公路上设计和实施PTSU战略提供了宝贵的见解.
相关概念视频
01:17Design Example: Alignment of a Road Line Using GIS
73
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...
73
01:07Unsymmetric Loading of Thin-Walled Members: Problem Solving
134
The shear center of a channel section with uniform thickness, height, and width, is determined by computing the shear force in the member and calculating the moments of inertia of the sections.
To compute the shear forces, find the shear flow at a specific distance from the endpoint using the vertical shear and the moment of inertia values. The total shear force on the flange is calculated by integrating the shear flow from one end of the flange to the other.
Next, calculate the moments of...
To compute the shear forces, find the shear flow at a specific distance from the endpoint using the vertical shear and the moment of inertia values. The total shear force on the flange is calculated by integrating the shear flow from one end of the flange to the other.
Next, calculate the moments of...
134
01:19Introduction to Horizontal Curves
131
Horizontal curves are essential in highway and railroad design, ensuring smooth and safe transitions between straight path segments, or tangents. These curves allow vehicles to maintain speed without abrupt changes, minimizing accidents and improving travel efficiency.A horizontal curve is typically defined by its geometric relationship to two tangents that meet at an intersection point (P.I.), where a simple curve is introduced to connect them. The back tangent refers to the initial tangent...
131
01:29Sight Distance in a Vertical Curve
80
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...
80
01:23Vertical Curve: Problem Solving
102
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...
102
01:24Introduction to Vertical Curves
73
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...
73