基于等效通行能力的施工区交通影响评价方法

随着我国机动车保有量的持续增长,现有的城市道路资源已不满足交通需求,许多城市都在对已有道路进行升级改造,频繁的道路施工对城市交通运行产生了巨大影响。针对城市道路结构特征,提出一种适用于城市占道施工区的交通影响评价方法。结合城市道路所具有的间断流设施特点,应用等效通行能力概念给出了等效饱和度城市占道施工区交通影响评价指标;基于改进的BPR模型,给出了适用于城市道路的行程时间计算模型,并给出了行程时间可靠性评价指标评价方法;综合考虑了平均延误、等效饱和度、行程时间可靠性评价指标,提出了城市占道施工区交通影响综合评价方法,从“点”、“线”、“面”三个不同维度给出了城市占道施工区交通影响评价阈值;结合交通影响评价阈值给出了城市占道施工区交通影响范围确定流程。仿真结果表明,本文建立的基于等效通行能力的施工区交通影响评价方法解决了已有方法计算难度大,难以应用于实际的问题,且综合不同层面给出了具体的交通影响评价阈值,克服了传统方法只从单一层面确定交通影响评价阈值的缺陷。

Evaluation method of traffic impact evaluation method of work zones based on equivalent capacity

With the continuous growth of the number of motor vehicles in China, the existing urban road resources can no longer meet the traffic demand. Many cities are upgrading the existing roads, and frequent road construction has had a huge impact on urban traffic operation. Aiming at the characteristics of urban road structure, a traffic impact assessment method suitable for urban arterial work zones is proposed. Combined with the characteristics of intermittent flow facilities of urban roads, the concept of equivalent capacity is applied to give the traffic impact evaluation index of equivalent saturation urban arterial work zones. Based on the improved BPR model, Based on the improved BPR model, a travel time calculation model suitable for urban roads is given, and gives the evaluation method of the reliability evaluation index of the travel time; comprehensively considers the average delay, equivalent saturation, and the reliability evaluation index of the travel time, and proposes a comprehensive evaluation method for the traffic impact of urban arterial work zones. The three different dimensions of "line" and "surface" give the traffic impact evaluation threshold of urban arterial work zones; combined with the traffic impact evaluation threshold, the process of determining the traffic impact scope of urban arterial work zones is given. The simulation results show that the traffic impact assessment method for construction area based on equivalent traffic capacity established in this paper solves the problem that the existing methods are difficult to calculate and difficult to apply in practice, and gives specific traffic impact assessment thresholds at different levels, overcoming the defect that traditional methods only determine the traffic impact assessment threshold from a single level.