Design of Tunnel Sidewall Speed Control Guidance Signs Based on Visual Illusion and Experimental Study on Speed Control Effect
Received date: 2024-06-17
Online published: 2024-12-03
In order to improve the drivers' ability to perceive and control the speed in tunnels and reduce the traffic accident rates, based on the principle of visual illusion, nine visual speed control guidance sign schemes with different shapes, angles, lengths, and color combinations were proposed for tunnel sidewalls to provide visual stimulation and reference for drivers, achieving the goal of active speed reduction. Experimental research was conducted on these nine design schemes on the sidewall of Yunmeng Mountain No.1 Tunnel on Zhangjiakou-Shijiazhuang Expressway. Video and laser detection equipment were used to detect the vehicle speed in the tunnel with the nine sign design schemes, analyze the instantaneous vehicle speed, average vehicle speed, speed standard deviation, and acceleration data, and compare the speed control effect and stability under the condition of no speed control sign and with the use of designed speed-control signs. The results showed that the deceleration effect of di-fferent speed control guidance signs was different. The arrow shaped 90° speed control visual guidance sign had the most significant deceleration effect, reducing the average vehicle speed and vehicle speed standard deviation by 18.3% and 24.8%, respectively. In addition, the acceleration change remained stable in the experimental range, showing good results in reducing vehicle speed and improving vehicle speed stability; The diagonal shaped 55° speed control visual guidance sign increased the instantaneous speed of the vehicle by 9.3%, increasing traffic safety hazards. Based on the above research results, it is recommended to use arrow shaped 90° speed control visual guidance signs as tunnel sidewall speed control guidance signs.
QI Shuping , SONG Zhengfeng , HAN Zicong , SONG Yaowu , TONG Wei , WANG Fu . Design of Tunnel Sidewall Speed Control Guidance Signs Based on Visual Illusion and Experimental Study on Speed Control Effect[J]. Transport Research, 2024 , 10(5) : 112 -118 . DOI: 10.16503/j.cnki.2095-9931.2024.05.010
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