Simulation study for Changing some roundabouts in Karbala government into signalized roundabouts

Abstract

This research aims to analyze and evaluate some of the main roundabouts in Karbala Governorate after they were converted to signalized roundabouts by the simulation program PTV VISSIM. These roundabouts suffer from large traffic, which leads to a significant decrease in their level of service (LOS), especially at peak times, when it is observed that the traffic police intervene to direct the traffic and reduce congestion. Therefore, one of the proposals was to use the light signal to control the roundabout at peak times. The results were positive in the first roundabout, as the level of service (LOS) decreased from F to D, and the LOS of the other roundabout also decreased, though to a lesser extent, from F to E due to heavy traffic volumes at peak times and design errors in the roundabout.

Keywords

• A Simulation Study
• Signalized Roundabout
• PTV Vissim
• Level of Service

References

1. Ahac, S. and V. Dragčević (2021). "Geometric Design of Suburban Roundabouts." Encyclopedia 1(3): 720-743. doi: https://doi.org/10.3390/encyclopedia1030056.
2. Akçelik, R. (2009). SIDRA INTERSECTION User Guide for Version 6, Akçelik and Associates Pty. Ltd., Melbourne, Australia.
3. D.C, W. (2005). Highway Capacity Manual TRB, Transportation Research Board. doi: Garber, N. J. and L. A. Hoel (2019). Traffic and highway engineering, Cengage Learning.
4. Hummody, M. (2007). A Four-Leg Roundabout Delay Model Using Microsimulation Technique, Ph. D. thesis, University of Technology.
5. Iraq, C. S. O. o. (2020). Statistics of private sector cars registered in the General Traffic Directorate until 12/31/2020. https://cosit.gov.iq/ar/component/banners/click/2.
6. Lakouari, N., O. Oubram, R. Marzoug, H. Ez-Zahraouy, J. Velásquez-Aguilar and L. Cisneros-Villalobos (2018). "Simulation study of traffic circle intersection with traffic lights." International Journal of Modern Physics C 29(07): 1850062. doi: https://doi.org/10.1142/S0129183118500626
7. Muchlisin, I. T. and W. Widodo (2019). "Optimization Model of Unsignalized Intersection to Signalized Intersection Using PTV Vissim: Study Case in Imogiri Barat and Tritunggal Intersection, Yogyakarta, Indonesia." International Journal of Integrated Engineering 11(9): 11-25. doi: https://doi.org/10.30880/ijie.00.00.0000.00.0000
8. Saleh, H. M. A. (2021). A Surrogate Measure to Assess Safety Condition at Different Signalized Intersections. Master Degree, University of Babylon.

9. Songchitruksa, P., S. Sunkari, I. Ugalde, J. Rosca and J. Aparicio Ojea (2017). "Interlinking Vissim and ns-3 for Connected Vehicle Simulation: Case Study of Intelligent Dilemma Zone Avoidance." Transportation Research Record 2619(1): 36-43. doi: https://doi.org/10.3141/2619-04
10. Wu, J., E. Radwan and H. Abou-Senna (2018). "Determination if VISSIM and SSAM could estimate pedestrian-vehicle conflicts at signalized intersections." Journal of Transportation Safety & Security 10(6): 572-585. doi: https://doi.org/10.1177/03611981221075630
11. Xing, Y., J. Lu, L. Lu, C. Jiang and X. Cai (2014). "Comprehensive safety assessment model of road long tunnel based on VISSIM." Intelligent Automation & Soft Computing 20(4): 501-514. doi: http://dx.doi.org/10.1080/10798587.2014.934595