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http://dx.doi.org/10.12815/kits.2019.18.3.84

Development of VSL Control Algorithms for Various Traffic Conditions in Tunnels  

Lee, Soo-Yang (Korea Expressway Corporation)
Lee, Sang-Soo (Dept. of Transportation Eng., Ajou Univ.)
Lee, Choul-ki (Dept. of Transportation Eng., Ajou Univ.)
Publication Information
The Journal of The Korea Institute of Intelligent Transport Systems / v.18, no.3, 2019 , pp. 84-94 More about this Journal
Abstract
This paper developed the VSL control algorithms for various traffic conditions in tunnels. Various algorithms determining control speed, buffer speed, and display time were suggested in order to apply three gantry locations. The algorithms were evaluated by constructing simulation environments using python and VISSIM Com-Interface. Results show that speed difference between congested flow and normal flow was 50 km/h without algorithm application, but the difference was reduced to 20 km/h with algorithm application. In addition, the length of congested region in the exit section of the tunnel was also reduced from 800m to 300m with algorithm application. It is expected that the traffic accidents in tunnels may be reduced since the average and standard deviation of the speed are greatly reduced after applying the algorithms suggested.
Keywords
VSL; Algorithm; Tunnel; Congestion; Simulation;
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