Civil & Environmental Engineering, Center for Transportation Policy Studies, The University of North Carolina at Charlotte, Charlotte, NC 28223-0001, USA.
Traffic Inj Prev. 2010 Feb;11(1):104-13. doi: 10.1080/15389580903370039.
The likelihood of being involved in a crash on a freeway, in general, is greater on weaving sections than on basic freeway sections and in ramp influence areas. This is due to possible crossing of entry and/or exit traffic over a short distance while traveling in the same direction without the aid of traffic control devices resulting in potential conflicting situations and crashes. This article focuses on evaluating the role of weaving section characteristics (configuration type, length and the number of required lane changes by weaving traffic) and traffic variables (entry volume, exit volume, and non-weaving volume) on crashes in weaving areas.
Data collected for 25 weaving sections in the Las Vegas metropolitan area are used to study the relationship between crashes and weaving section characteristics and traffic variables. The relationship between (1) crashes by selected collision types and contributing factors and (2) weaving section characteristics and traffic variables are also examined. Descriptive and statistical analysis techniques were used.
The number of crashes tends to decrease with increase in length of weaving section. Increase in entry volume increases crashes due to improper lane change and ran off roadway crashes. On the other hand, increase in exit volume increases rear-end crashes, crashes due to following too closely, and crashes due to inattentive driving. Non-weaving volume, in general, also appears to play a prominent role in explaining most crash types and contributing factors on weaving sections.
Type "A" weaving section tends to be relatively safer when compared to other weaving configuration section types. Retrofitting weaving sections with short lengths or designing sections with longer lengths, in addition to increased use of in-vehicle warning systems, may reduce crashes and improve safety. Ramp metering, enforcement, changeable message signs (speed signs), and capacity improvements are other solutions for consideration.
一般来说，在匝道汇入区和分流区，与基本路段相比，车辆在交织路段发生碰撞的可能性更大。这是由于车辆在同一方向行驶时，在短距离内可能会与驶入和/或驶出的交通流交叉，而没有交通控制设施的帮助，从而导致潜在的冲突和碰撞。本文重点研究了交织路段特征（配置类型、长度和交织交通所需的车道变换次数）和交通变量（驶入交通量、驶出交通量和非交织交通量）对交织区碰撞事故的影响。
本文使用拉斯维加斯大都市区 25 个交织路段的数据来研究碰撞事故与交织路段特征和交通变量之间的关系。还研究了（1）选定碰撞类型和致因的碰撞事故与（2）交织路段特征和交通变量之间的关系。采用描述性和统计分析技术。
随着交织路段长度的增加，碰撞事故数量呈下降趋势。驶入交通量的增加会导致车道变换不当和驶离路面的碰撞事故增加。另一方面，驶出交通量的增加会导致追尾碰撞、跟车过近导致的碰撞和注意力不集中导致的碰撞。一般来说，非交织交通量似乎也在解释交织路段的大多数碰撞类型和致因方面发挥了突出作用。
与其他交织路段配置类型相比，A型交织路段相对更安全。通过安装车载预警系统，对短长度的交织路段进行改造，或设计更长长度的路段，可以减少碰撞事故，提高安全性。此外，匝道调节、执法、可变信息标志（速度标志）和通行能力改善也是可以考虑的解决方案。
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