Article
MEASURES TO IMPROVE TRAFFIC OPERATIONS AT SIGNALIZED INTERSECTIONS IN URBAN AREAS
DOI: 10.7708/ijtte.2019.9(4).06
9 / 4 / 408 - 418 Pages
Author(s)
Mohamed Ragab - Department of Civil Engineering, Faculty of Engineering, Suez University, Egypt -
Abstract
Intersections are usually considered the most complex locations in the road network. They have a very considerable effect on operational performance of road traffic. Traffic signals at intersections have a significant effect on traffic operations. Therefore, the objective of this research is to set measures for improving the traffic operations at signalized intersections in urban areas. Two 3-legged intersections located in Mansoura City, Egypt were selected in this study. Vehicle speed and acceleration profiles obtained using GPS device were used to estimate delay times. The micro-simulation software VISSIM was used to model and analyze the selected intersections. The field collected data were used in the calibration and validation processes. The study investigated three scenarios using the developed models; Scenario 0 (original scenario), Scenario 1 (optimization of signal cycle time) and Scenario 2 (increasing of lane width). The evaluation was conducted based on average delay values and LOS. The simulation results indicated that Scenario 1 and Scenario 2 can reduce the delay values resulting the better LOS values from D to C for both selected intersections. Moreover, Scenario 1 exhibited lower delay values than other scenarios for both intersections.
Number of downloads: 604
Keywords:
delay time;
traffic signals;
speed profiles;
VISSIM;
References:
Ahmed, A.; Mehdi, M.; Rizvi, S.; Fatima, T. 2019. Evaluation of existing performance and potential for optimization of traffic signals in Karachi, Arabian Journal for Science and Engineering 44(10): 8747–8759.
Afshar, A.; Yaman, H. 2014. Estimation of level of service at signalized intersections around the proposed health campus in Etlik, Ankara. In Proceedings of the 11th International Congress on Advances in Civil Engineering.
Garber, N.; Hoel, L. 2009. Traffic and highway engineering. 4th Edition, West Publishing Company, Boston, Mass., USA. 460 p.
Hashim, I. H.; Ragab, M.; Asar, G. M. 2018. Optimization of vehicle delay and exhaust emissions at signalized intersections, Advances in Transportation Studies 46: 5-18.
Ko, J.; Hunter, M.; Guensller, R. 2008. Measuring control delay components using second-by-second GPS speed data, Journal of Transportation Engineering 134(8): 338-346.
Kumarm R.; Dhinakaran G. 2012. Estimation of delay at signalized intersections for mixed traffic conditions of a developing country, International Journal of Civil Engineering, 11 (1): 53-59.
Lin, C.; Gong, B.; Qu, X. 2015. Low emissions and delay optimization for an isolated signalized intersection based on vehicular trajectories, PLOS ONE Journal, 10(12): 1-17.
Luttinen, R.; Nevala, R. 2002. Capacity and level of service of Finnish signalized intersections. Finnra Reports 25.
Manjunatha, P.; Vortisch, P.; Mathew, T. 2013. Methodology for the Calibration of VISSIM in Mixed Traffic. In Proceedings of the Transportation Research Board, 92th Annual Meeting. 12 p.
MUTCD. 2012. Manual on uniform traffic control devices. Federal Highway Administration, Washington, D.C.
Park, B.; Schneeberger, J. D. 2003. Microscopic simulation model calibration and validation: case study of VISSIM simulation model for a coordinated actuated signal system, Transportation Research Record, Journal of the Transportation Research Board 1856: 185-192.
PTV AG. 2014. VISSIM 7.00 user manual. Planning Transport Verkehr AG, Karlsruhe, Germany.
Quiroga, C.A.; Bullock, D. 1999. Measured control delay at signalized intersections, Journal of Transportation Engineering 125(4): 271-280.
Ragab, M.; Hashim, I. H.; Asar, G. M. 2017. Impact of road traffic on air emissions: case study Kafr El-Sheikh City, Egypt, International Journal for Traffic and Transport Engineering 7(3): 391 - 405.
TRB. 2010. Highway capacity manual. Washington, D.C., National Research Council, 5-3 p.
Quoted IJTTE Works
Related Keywords