城市快速路行人过街设施设置条件分析方法研究

The Analysis of Setting Condition of Pedestrian Crossing Facilities on Urban Expressway

考虑快速路主辅隔离带上设置公共交通站点时,站点乘降客流的过街行为对辅路机动车流的影响,构建了快速路过街设施设置条件的分析方法.首先,从辅路行人-机动车冲突点时空分离的角度,分析快速路过街设施的类型;其次,基于行人过街和车流消散理论,分析辅路无信号控制和有信号控制人行横道的通行能力,构建辅路无信号控制、有信号控制和立体过街设施设置条件的临界点计算模型,对主路立体过街设施引脚不同位置的辅路交通流进行分析,最终提出快速路行人过街设施的设置条件及其评价指标.并通过实例分析验证其有效性和实用性.

A design method of pedestrian crossing facilities on urban expressway is proposed considering the effects of bus up-down passenger flow crossing on vehicle flow when a bus stop located at isolation belt between urban expressway and auxiliary road.First,these types of pedestrian crossing facilities are analyzed from reducing the car-pedestrian conflict points.Then the capacities of unsignalized and signalized crosswalk are calculated based on pedestrian acceptable gap theory and vehicle dissipation theory.The critical values of car and pedestrian flow capacity in assistant road are computed to select the types of pedestrian crossing facilities from signalized crosswalk,none-signalized crosswalk and overpass.The foot of overpass is located through the volume of crossing-street and riding-bus pedestrian.In the final section,a practical example is conducted to prove the feasibility and efficiency.