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一级公路是我国公路网中承担干线功能和集散功能的多车道普通公路形式。混行交通在我国公路交通中普遍存在,路侧冲突对交通流运行速度产生影响,定量分析路侧冲突对交通流的影响是公路设计的重要工作。通过调查驾驶员对不同路侧冲突类型的直观印象,为路侧冲突定义了4个强度等级,选择国内7个具有代表性的典型一级公路路段进行交通流数据观测,采用方差分析技术对试验数据进行分析。结果表明:当采用自由流速度的85%位车速作为运行速度的评价指标时,路侧冲突强度的影响是显著的。通过建立起路侧冲突强度等级与85%位自由流速度之间的关系,量化了路侧冲突强度对一级公路运行速度的影响。
The first grade highway is a multi-lane ordinary highway which takes on the function of trunk line and distribution function in the highway network of our country. Mixed traffic is ubiquitous in China’s road traffic. Road-side conflicts have an impact on the speed of traffic flow. Quantitative analysis of the impact of road-side conflicts on traffic flow is an important task in highway design. By investigating the driver’s visual impression of different types of roadside conflicts, four intensity levels were defined for roadside conflicts, seven representative typical first-class road sections were selected for traffic flow data observation, and the variance analysis technique was used to test Data analysis. The results show that when 85% of the free-flow speed is used as the evaluation index of running speed, the impact of road-side collision strength is significant. By establishing the relationship between roadside conflict intensity level and 85% free-flow speed, the impact of roadside conflict intensity on the running speed of the first-class highway is quantified.