Urban Tunnel Traffic Operating Characteristics and Its Safety Study Based on Surveillance Camera Data

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1 Vol. 2 1 No. 8 Aug * X951 U491 A 09PJ Urban Tunnel Traffic Operating Characteristics and Its Safety Study Based on Surveillance Camera Data WANG Xue-song 1 SHI Qi 2 GAO Zhen 3 1 School of Transportation Engineering Tongji University Shanghai China 2 Civil and Environmental Engineering University of Central Florida Orlando US 3 School of Software Engineering Tongji University Shanghai China Abstract In order to enhance traffic safety in urban tunnels the traffic operational and safety characteristics of Xiangyin tunnel in Shanghai were investigated. By means of video data from the tunnel operation monitoring camera and vehicle tracking survey the average speed and vehicle density of different sections the average speed of different lanes for the same section and the lane changing behaviors in Xiangyin Tunnel were analyzed in this study. The results indicate that the considerable speed difference near the tunnel entrance of south line might be responsible for the rear-end crash occurrence of this area. Frequent lane changes cause sideswipe collisions. Appropriate speed limit and prohibition of lane-changing behaviors are necessary. This study aids the understanding of traffic operations and driving characteristics in urban tunnels. Key words urban expressway tunnel crash patterns video camera data traffic operational features driving characteristics *

2 h 3 ~ 4 min km 80 km /h Fig. 1 Xiangyin road tunnel % 12. 3%

3 8 131 Fig. 2 2 Daily distribution for traffic volume and crash percentage 56% 23% 73% 6% Vashitz Shinar 9 72% 20% 2 Manser ~ 7 Haack 5 Vuilleumier 6 Mashimo 7 Amundsen F. H. 8 Tornros 10

4 珔 h ± 2s 珔 h s 3 12 α m = 珔 h m 珔 h s 1 4 珔 h l α l = 珔 2 h s α l α m 珔 h l 珔 h m 珔 h s 2 2 min T-test / α > t α m + n { } H 1 = x x珋 - y珋 1 x m y 1 y n t = 1 s w m + 1 n 槡 x y m n x y i s t s 2 1 = m + n - 2 m x i - 珋 x 2 + m y i - 珋 y 2 [ ] i =1 i = km /h 3

5 8 133 Fig. 3 3 Zonal average speed in Xiangyin tunnel 1 Table 1 Zonal average speed in Xiangyin tunnel km / h T-test 2 Manser Hancock 2 Table 2 Speed difference test km / h T p T p

6 Fig. 4 3 Traffic density in Xiangyin tunnel Table 3 Traffic density in Xiangyin tunnel km / h T-test 7 4 Table 4 Speed consistency test km / h T p T p

7 Fig. 5 5 Lane-changing according to vehicle types Table Preferred lane when changing lanes Fig. 6 Cross section for lane-changing

8 LED % 85% Manser Hancock 1. J HU Xi-ling CHEN Li-dao. Analysis on traffic accidents in urban roads and tunnels J. China Municipal Engineering

8 137 2. J. 2002 3 268-270. ZHANG Wei JIANG Wei ZHANG Wei-guo. Fire prevention in urban underground traffic tunnels J. Under Ground Space 2002 3 268-270. 3. J. 2009 19 8 144-151.

Study on the Safety Evaluation System and Method of Brban Traffic Tunnel D. Chengdu Southwest Jiaotong University 2005. 5 Haack A. Current safety issues in traffic tunnels J.

9 J ZHANG Wei JIANG Wei ZHANG Wei-guo. Fire prevention in urban underground traffic tunnels J. Under Ground Space J XIAO Jing-fu HU Qun-fang HUANG Hong etc. Investigation and research on the early-warning index system of urban road tunnel J D WANG Yun. Study on the Safety Evaluation System and Method of Brban Traffic Tunnel D. Chengdu Southwest Jiaotong University Haack A. Current safety issues in traffic tunnels J. Tunneling and Underground Space Technology Vuilleumier F. Weatherill A. Crausaz B. Safety aspects of railway and road tunnel example of the Lotschberg railway tunnel and Mont-Blancroad tunnel J. Tunneling and Underground Space Technology Mashimo H. State of the road tunnel safety technology in Japan J. Tunneling and Underground Space Technology Amundsen F H. and Ranes G. Studies on traffic accidents in Norwegian road tunnels J. Tunneling and Underground Space Technology Vashitz G. Shinae D. and Blum Y. In-vehicle information systems to improve traffic safety in road tunnels J. Transportation Research Part F Tornros J. Driving behaviour in a real and a simulated road tunnel - - a validation study J. Accident Analysis and Prevention Manser M P. and Hancock P A. The influence of perceptual speed regulation on speed perception choice and control Tunnel wall characteristics and influences J. Accident Analysis and Prevention M ZHOU Shang-wu. Traffic Engineering M. Shanghai Tongji University Press EB /OL http / /news. sohu. com / / n shtml. LI Yi-zhong. Wuhan Yangtze River Tunnel Opens on Sunday Traffic Control will be Imposed on Vehicles EB /OL Yangtze Daily http / /news. sohu. com / /n shtml EB /OL http / /www. xmnn. cn /dzbk /xmrb / / / t _ htm. XU Jing-ming. Xiang'an Tunnel Opens to Traffic at 10 a. m. on June 26th EB /OL http / /www. xmnn. cn / dzbk / xmrb / / / t _ htm wangxs@ tongji. edu. cn shiqi@ knights. ucf. edu.

Journal of South China University of Technology Natural Science Edition

45 8 207 8 Journal of South China University of Technology Natural Science Edition Vol 45 No 8 August 207 000-565X20708-0050-07 2 3002202 54004 PERCLOS U49 doi0 3969 /j issn 000-565X 207 08 008 4-7 0 h