基于驾驶模拟的高速公路改扩建受限路段安全性评价

Evaluation on Safety of Restricted Sections in Expressway Reconstruction and Expansion Based on Driving Simulation

摘要:

既有高速公路在改扩建设计中常因用地空间、结构物等的限制，造成局部路段的横断面宽度、纵断面线形指标等难以100%达到规范要求的情况。如何有效应对受限路段、确保交通运行安全是影响设计方案可行性的重中之重。为了研判设计方案的合理性，采用8自由度高仿真驾驶模拟器进行了实验，根据车辆运行特征和驾驶行为特征两大类实验数据，在车速一致性、行车轨迹一致性和加速测试等指标上对G15公路嘉金段（G1503公路—S32公路）改扩建工程中的4处典型受限路段进行了安全性评价。根据评价结论，对总体及交通设计方案上进行了优化，在实现 “安全与效率兼顾、设计与实际匹配” 目标的同时，也为其它改扩建工程提供了参考和借鉴。

Abstract:

In the design of expansion and reconstruction of existing expressways, due to the limitations of land space and structures, it is often difficult for the cross-sectional width and longitudinal section linear indicators of some road sections to fully meet the requirements of the specifications. How to effectively deal with the restricted sections and ensure the safety of traffic operation is a top priority affecting the feasibility of the design scheme. To assess the rationality of the design scheme, an 8-degree-of-freedom high-fidelity driving simulator is used to conduct the experiments. Based on two major types of experimental data such as vehicle operation characteristics and driving behavior characteristics, 4 typical restricted sections in the G15 Highway Jiajin Section (from G1503 Highway to S32 Highway) Reconstruction and Expansion Project are evaluated in the safety in terms of indicators such as vehicle speed consistency, driving trajectory consistency and acceleration tests. According to the evaluation conclusion, the overall and traffic design schemes are optimized. At the same time of achieving the goal of “balancing safety and efficiency, matching design with reality”, a reference is provided for other similar projects.