The effects of a traffic guidance scheme for auto-toll lanes on traffic safety at toll plazas |
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| Institution: | 1. Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China;2. Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China;3. Department of Geography, The University of Hong Kong, Pokfulam Road, Hong Kong, China;4. Department of Civil Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China;1. Department of Transportation Planning & Engineering, School of Civil Engineering, National Technical University of Athens, 15773, Greece;2. School of Architecture, Civil and Building Engineering, Loughborough University, Ashby Road, Loughborough, LE11 3TU, United Kingdom;3. Department of Civil, Geo and Environmental Engineering, Technical University of Munich, Munich, 80333, Germany;4. Faculty of Technology, Policy and Management, Technical University of Delft, Jaffalaan 5, Delft, 2628 BX, Netherlands;5. Lab for Transport Engineering, Department of Civil and Environmental Engineering, University of Nicosia, Nicosia, 2111, Cyprus;6. Chair of Transportation Systems Engineering, Department of Civil, Geo and Environmental Engineering, Technical University of Munich, Munich, 80333, Germany;1. School of Transportation and Logistics, Southwest Jiaotong University, China;2. Department of Civil Engineering, The University of British Columbia, Canada;3. School of Transportation Science and Engineering, Harbin Institute of Technology, China;1. Department of Civil and Natural Resources Engineering, University of Canterbury, 20 Kirkwood Ave, Christchurch 8041, New Zealand;2. Department of Civil and Urban Engineering, Connected Cities for Smart Mobility towards Accessible and Resilient Transportation (C2SMART) Center, and Center for Urban Science and Progress (CUSP) New York University, 370 Jay Street, Brooklyn, NY 11201, United States;3. Department of Modeling, Simulation & Visualization Engineering, Old Dominion University, 4700 Elkhorn Ave, Norfolk, VA 23529, United States;1. Jiangsu Key Laboratory of Urban ITS, Southeast University, Nanjing 210096, China;2. Intelligent Transportation Research Center, Southeast University, Nanjing 210096, China;3. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;1. Nagoya Institute of Technology, JP;2. Nagoya Institute of Technology, JP;3. JR-Central Consultants Company, JP |
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| Abstract: | The Transport Department of the Hong Kong SAR government conducted a trial traffic guidance scheme at the plaza of a busy road tunnel. The scheme involves the placing of reflective road markings on the approach lanes to the toll plaza and the erection of a gantry sign that clearly distinguishes the auto-toll lane. The main purpose of the scheme is to improve traffic flow and traffic safety at the toll plaza. If the scheme is successful, then it will be applied to all other toll plazas in Hong Kong. We conducted an observational before-and-after study to assess the effects of the scheme. We found that the overall lane-changing rate decreased significantly by 23% (0.1 lane crossings per vehicle) at a significance level of 0.05, the pooled conflict count decreased sharply by 44% at a significance level of 0.10, and the crash count also decreased sharply by 38%. The mean travel time for non-auto-toll traffic increased significantly by 30% (8 s), whereas that of auto-toll Sunday traffic decreased by 18% (2 s). Both changes are statistically significant at a level of 0.05. The results indicate that the trial scheme provided good guidance to drivers. Traffic safety was improved, and the travel time of auto-toll traffic improved in certain periods, although at the expense of non-auto-toll traffic. |
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