Beijing Key Laboratory of Traffic Engineering, Beijing University of Technology, Beijing 100124, PR China.
Beijing Intelligent Transportation Development Center, Beijing 100073, PR China.
Accid Anal Prev. 2025 Jan;209:107828. doi: 10.1016/j.aap.2024.107828. Epub 2024 Nov 12.
The eight-lane freeway resulting from reconstruction and expansion typically exhibits short distances between interchanges and a wide road section. Nonetheless, the absence of specific guidelines for the placement of guide signs in dense interchange sections of the eight-lane freeway results in inadequate design, thereby impeding drivers' ability to read and comprehend the signs. To tackle this issue, the study employs two interchanges 2.48 km apart on the Jinan-Qingdao Freeway as a case study. Four optimization schemes for guide signs are developed based on drivers' information requirements and compared with the current guide sign design scheme. Thirty-nine drivers were recruited to gather detailed driving behavior indicators via a driving simulation experiment. The impact of the guide sign optimization scheme on driving behavior is analyzed, and the overall effects are evaluated using the non-integer rank RSR method. This study aims to identify an optimal approach to guide sign design for dense interchange sections. The results indicate that the impact of guide signs in dense interchange sections on drivers is primarily concentrated between the two interchanges. Specifically, the addition of a 2.5 km exit advance sign enhances drivers' speed regulation level, the inclusion of navigation voice improves operational stability, and the presence of pavement words at exit diversion locations enhances psychological comfort for drivers. By considering the comprehensive effectiveness of each optimization scheme, it is evident that schemes 5 and 2 exhibit superior optimization effects. This suggests that providing advanced notice of exit information in dense interchange sections of eight-lane freeways is an effective measure to enhance freeway service levels and ensure driving safety. It is recommended that under the conditions of insufficient interchange spacing, the information of interchange exits should be forewarned in advance. Additionally, auxiliary navigation voice and pavement words should be employed to enhance drivers' information perception levels, thereby mitigating the risk of missing exits due to limited reaction time. This paper serves as a significant reference for informing the optimal configuration of guide signs, thereby contributing to the meticulous development of standardized specifications.
八车道高速公路经过重建和扩建后，通常具有较短的出入口间距和较宽的道路路段。然而，在八车道高速公路密集的互通式立交段，缺乏关于导向标志设置的具体指南，导致设计不合理，从而阻碍驾驶员读取和理解标志的能力。为了解决这个问题，本研究以济青高速公路上相距 2.48 公里的两个互通式立交为案例进行研究。根据驾驶员的信息需求，制定了四种导向标志优化方案，并与现行的导向标志设计方案进行比较。招募了 39 名驾驶员通过驾驶模拟实验收集详细的驾驶行为指标。分析了导向标志优化方案对驾驶行为的影响，并采用非整数秩 RSR 方法对总体效果进行评估。本研究旨在确定一种用于密集互通式立交段导向标志设计的最优方法。结果表明，密集互通式立交段导向标志对驾驶员的影响主要集中在两个互通式立交之间。具体来说，增加 2.5 公里出口预告标志可以提高驾驶员的速度调节水平，加入导航语音可以提高操作稳定性，在出口分流位置设置路面文字可以增强驾驶员的心理舒适度。考虑到每个优化方案的综合效果，可以明显看出方案 5 和 2 具有更好的优化效果。这表明，在八车道高速公路密集互通式立交段提供出口信息的提前通知是提高高速公路服务水平和确保驾驶安全的有效措施。建议在互通式立交间距不足的情况下，提前预告互通式立交出口信息。此外，应采用辅助导航语音和路面文字，提高驾驶员的信息感知水平，从而减少因反应时间有限而错过出口的风险。本文为导向标志的最佳配置提供了重要参考，为标准化规范的精细化制定做出了贡献。
