EVALUATION OF OPERATIONAL AND ENVIRONMENTAL PERFORMANCE OF MEDIAN U-TURN DESIGN USING MICRO-SIMULATION
7 / 1 / 37 - 51 Pages
Mohamed Ragab - Department of Civil Engineering, Higher Institute of Engineering and Technology in Kafr El-Sheikh -
Road intersections force vehicles to slow down and stop in varying patterns and contribute to the increase in vehicular emissions. The main aim of this paper is to evaluate the operational and environmental performance of median U-turn design. Also, it aims to compare this design with conventional three-leg and signalized three-leg intersections in terms of average delay, fuel consumption and air emissions including carbon monoxide (CO), nitrogen oxides (NOX) and hydrocarbons (HC). The microscopic traffic simulation model VISSIM was used to model and analyze the three designs under a wide range of balanced and unbalanced flow conditions. The results indicated that, the median U-turn (MUT) design exhibited slightly lower delays than conventional three-leg intersection at balanced volume scenarios, up to approximately 1250 veh/hr/approach. After this volume level, the median U-turn (MUT) design exhibited higher delays than three-leg intersection. Also, the median U-turn (MUT) design exhibited lower air emissions and fuel consumption than other intersections at all balanced volume scenarios. In addition, under unbalanced volume scenarios, the average delay, air emissions and fuel consumption increased with the increase of main and/or cross street volumes for the median U-turn (MUT) design.
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Bared, J. G.; Kaisar, E. I. 2002. Median U-turn Design as an Alternative Treatment for Left Turns at Signalized Intersections, ITE Journal 72(2): 50-54.
El-Esawey, M.; Sayed, T. 2011. Operational Performance Analysis of the Unconventional Median U-turn Design Using Micro-simulation. Proceedings of the Transportation Research Board 90th Annual Meeting, Washington, DC.
El-Metwally, M.; Rakha, H. 2009. Analysis of Capacity Drop at Congestion toward Better Environment. International Road Federation. Retrieved September 15, 2015, Available from internet: http://www.irfnews.org/files/pdfs/Analysis_of_Capacity_Drop_at_Congestion_toward_Better_Environment.pdf.
Environmental Protection Agency 1975. Guidelines for Air Quality Maintenance Planning and Analysis. Volume 9, Evaluating Indirect Sources. Environmental Protection Agency, Washington, D.C.
Gyawali, S. 2014. A New Decision Making Approach for Indirect Left Turn Treatments by Utilizing Decision Assistance Curves. Ph.D. Degree Thesis, Faculty of The Graduate College, University of Nebraska, Lincoln. 80-94.
Highway Capacity Manual 2010. TRB, National Research Council, Washington, D.C.
Liao, Y.; Machemehl, B. 1995. Fuel Consumption Based Optimal Traffic Signal Timing, 37th TRF Annual Meeting Proceedings, 527-544.
Lv, J. 2012. Signal Timing Optimization to Improve Air Quality. Ph.D. Thesis, Office of Graduate Studies, Texas A & M University, USA, 1-15.
Mandavilli, S.; Rys, M.J. 2008. Russell, E.R. Environmental Impact of Modern Roundabouts, International Journal of Industrial Ergonomics 38 (2): 135-142.
Midurski, T.; Corbin, V. 1976. Characterization of Washington, D.C., Carbon Monoxide Problem. GCA Corporation, Environmental Protection Agency, Washington, D.C.
Mustafa, S.; Mohammed, A., Vougias, S. 1993. Analysis of Pollutant Emissions and Concentrations at Urban Intersections. Institute of Transportation Engineers, Compendium of Technical Papers.
Niittymaki, J.; Hoaglund, P.G., 1999. Estimating Vehicle Emissions and Air Pollution Related to Driving Patterns and Traffic Calming. In Proceedings of Urban Transport Systems conference, Lund, Sweden.
Olarte, C. 2011. Operational and Environmental Comparisons between Left-turn Bypass, Diverging Flow and Displaced Left-turn Intersection Designs. Master Degree thesis, College of Engineering and Computer Science, Florida Atlantic University, USA, 1-11.
PTV, 2014. VISSIM 7.00 User Manual. Planning Transport Verkehr, Karlsruhe.
Rodegerdts, L.; Nevers, B.; Robinson, B. 2004. Signalized Intersections. Informational Guide. Publication FHWA-HRT-04-091. FHWA, U.S. Department of Transportation, 244.
Srinivasan, R.; Subramaniam, S. 1979. Automobile and Air Pollution, Indian Highways. Indian Roads Congress, New Delhi, 7 (12): 27-39.
Taha, M.; Abdelfatah, A. 2015. Impact of U-Turns as Alternatives to Direct Left-Turns on the Operation of Signalized Intersections, Journal of Traffic and Logistics Engineering 3 (1): 12-17.
Tarnoff, P.; Parsonson, P. 1979. Guidelines for Selecting Traffic Signal Control at Individual Intersections. National Cooperative Highway Research Program, Transportation Research Board, National Research Council, Washington, D.C.
Varhelyi, A. 2002. The Effects of Small Roundabouts on Emissions and Fuel Consumption: A Case Study, Transportation Research Part D: Transport and Environment 7(1): 65-71.
Yang, X.; Zhou, H. 2004. CORSIM-Based Simulation Approach to Evaluation of Direct Left Turn versus Right Turn Plus U-Turn from Driveways, Journal of Transportation Engineering ASCE 130 (1): 68- 75.
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