Experimental on relationship between traffic signs anddrivers perception at exit of extralong tunnel(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2020年5期
- Page:
- 48-55
- Research Field:
- 桥梁与隧道工程
- Publishing date:
Info
- Title:
- Experimental on relationship between traffic signs anddrivers perception at exit of extralong tunnel
- Author(s):
- LIANG Bo; LIU Tao; XIAO Yao; ZHANG Hongming
- 1. School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China; 2. State KeyLaboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing400074, China; 3. Chongqing Rail Transit (Group) Co., Ltd, Chongqing 400042, China; 4. ChinaRailway Siyuan Survey and Design Group Co., Ltd., Wuhan 430063, Hubei, China
- Keywords:
- tunnel engineering; extralong tunnel; vehicle test; indoor simulation test; traffic signs; tunnel safety
- PACS:
- -
- DOI:
- -
- Abstract:
- In order to analyze the influence of the drivers identification which was caused by the setting of traffic signs on the inner and outer cross sections of the tunnel exit, the relationship between traffic signs and drivers information perception was studied by field vehicle test and indoor dynamic simulation test. Three drivers were selected to use the SMI eye tracker produced in Germany, and 34 effective driving tests on the six tunnels of the G65 Baomao Expressway Wulong Section were conducted. The ratio of pupil diameter change of drivers in ordinary highway section and tunnel exit section is compared and analyzed. Premiere software was used to make adjustable dynamic traffic signs.The logo and the realtime recorded road segment video would be merged and projected onto the same curved screen by the dual projection system, and the positions of different tunnel exits and signs could be switched. The indoor simulation test under the tunnel dynamic driving environment was conducted with the response time of the drivers identification signs as the characterization parameter. The results show that the pupil diameter change ratio can be used as a parameter to characterize the drivers bright adaptation state, and on this basis, it is determined that the normal pupil diameter change ratio of the driver is ±5% when the vehicle speed is 80 km/h. When the driver completes the exit adaptation the pupil diameter state is defined, and the mean time of the exit adaptation is 2.129 s. The response time of traffic signs inside and outside the exit of super long tunnel is the same, which means that the reaction time on the same side of the traffic sign and the traffic lane is shorter than the opposite side. The average response time of traffic signs outside the tunnel is 2.22 s, which is 0.64 s shorter than that in the tunnel. Based on the time, when the distance between the tunnel exit and the interchange is limited by the terrain and the effective recognition time of the design completion sign is less than 4.5 s, it is suggested that the traffic sign should be set at the top of the middle of the tunnel, otherwise it should be set on the right side of the road outside the tunnel. 5 tabs, 8 figs, 30 refs.
Last Update: 2020-10-12