平原区公路横断面要素安全性研究

Reserach on Safety of Highway Cross-Section Factors in Plain Areas

公路横断面要素指标是公路的重要控制指标之一。一些传统观念认为,提高公路横断面要素指标有利于安全水平的提高,由此倾向于修建更宽的公路,这在平原区尤其明显。为客观分析平原区公路横断面要素的安全特性,对72条平原区公路进行了现场勘察和交通事故、道路线形、交通组成等数据的采集工作,并把研究对象公路分为双车道和四车道两类。在此基础上进行了平原区公路横断面要素的安全性分析研究,包括双车道和四车道公路路基宽度、路面宽度对全部事故率、事故死亡率、普通路段事故率的影响规律。该规律可为平原区路基、路面宽度等指标的安全设计提供依据。

The width of highway cross-section is an important control factor for highways. Sometimes it is considered that the increasing of highway cross-section width is helpful for highway safety, so some wider highways are built, especially in plain areas. In order to analyse the safety of highway cross-section factors, some survey and clara collecting works are clone on 72 highways in plain areas. , such as highway data and accident data. The highways are classified to two-lane highways and four-lane highways, and the analysis works about highway cross-section factors are done, including the of influence rules of the subgrade width and pavement width of two-lane highways and four-lane highways on the accident rate of all accidents, death and accidents in common segments. The analysis results are useful for highway subgrade and pavement design in plain areas.