基于车辆限界的高速公路交织区交通安全评价研究

Safety Evaluation of Freeway Weaving Section Based on Vehicle Gauge

高速公路交织区车流的横向干扰突出,交通安全不容忽视。基于车辆安全运行所必需的纵向和侧向空间,提出了车辆限界的概念,分析并量化了基本安全限界和充分安全限界,明确以事故区、危险区和安全区描述车辆的运行安全状况,进一步提出了交织区安全评价的替代指标-危险系数和事故系数,并建立了替代指标模型,给出了评价模型的使用流程,以仿真实例说明了评价方法的可用性。

This paper was intended to develop a new method for safety evaluation of weaving sections.In freeway weaving sections,lateral conflicts between vehicles cannot be paid too much attention.The concept of vehicle gauge was put forward on the basis of vertical and lateral space needed by vehicles.The basic and sufficient safety gauge was quantified and analyzed.Safety performance was described in terms of crash area,dangerous area and safe area.Substitutes for safety evaluation including danger index and crash index were introduced and the models were developed together with their application procedures.A simulation example was used to demonstrate the usefulness of this method.