八车道高速公路分离式路基路段指路标志系统设计方法

Design Method for Guide Sign System on Eight-Lane Freeway with Detached Separated Subgrade Section

八车道高速公路分离式路基路段,容易导致驾驶员对路径走向的误判,增加交通安全隐患。因此,有必要针对八车道高速公路分离式路基路段指路标志系统,进行优化设计方法研究。本文根据驾驶员的信息需求,设计了3种分离式路基指路标志系统优化方案,并利用驾驶模拟技术,获取驾驶员的细粒度驾驶行为数据。基于设计方案,从速度控制水平、运行稳定水平、心理舒适水平3个方面选取6个指标构建评价指标体系,根据系统安全性、操作稳定性、运行顺畅性、驾驶舒适性的优化目标选取“熵权-TOPSIS”综合评估方法,评价指路系统的有效性,进而确定分离式路基路段的最佳指路标志设计方案,实现多目标决策导向的指路标志系统设计及效用评估优化。

The detached subgrade section of the eight-lane highway can easily lead to the driver s misjudgment of the path direction and increase the potential traffic safety hazards.Therefore,it is necessary to optimize the design method of the guide sign system for the detached subgrade section of the eight-lane expressway.It is thereby increasing traffic safety risks.It is therefore imperative to optimize the design of the road sign system for the separated subgrade section of the eight-lane freeway.This study developed three optimized schemes for the separated subgrade sign system based on drivers information requirements and utilized driving simulation technology to gather detailed driving behavior data.Using these design schemes,a comprehensive evaluation index system consisting of six indicators was constructed from the aspects of speed control,operational stability,and psychological comfort.Entropy weight-TOPSIS evaluation method was employed to comprehensively assess the effectiveness of the sign system in terms of system safety,operational stability,smooth operation,and driving comfort,thereby determining the optimal road sign design for the separated subgrade section and achieving multi-objective decision-oriented road sign system design and utility evaluation optimization.