基于运行车速的公路线形设计质量评价

Evaluation of Highway Alignment Design Quality Based on Operating Speed

速度因素在公路交通事故中占有相当的比重 ,而线形是决定车辆实际运行车速的基础 .通过对车辆运行特征的实地观察和运行车速的现场观测 ,标定了车辆运行车速和加速度与公路线形之间的关系模型 .从行车安全的角度出发 ,将线形单元间运行车速和加速度的变化量作为线形质量的评价标准 ,建立了线形质量评价模型 ,用以进行公路线形设计质量的定量评价 .

Speed is a main contributing factor in all traffic crashes,and alignment is the basic element to determine operating speed of vehicles.Based on field observations of traffic features and on-scene survey of operating speed,mathematic models between speed and alignment,acceleration/deceleration and alignment were set up.Form the aspect of road safety,variation of operating speed and acceleration/deceleration on conjoint alignment sections were regarded as the criterion to establish the model for quantitative evaluation of alignment.