Performance Evaluation of Al Jame’ Roundabout Using SIDRA

Authors: D. Muley, H. S. Al-Mandhari

Abstract:

This paper evaluates the performance of a multi-lane four legged modern roundabout operating in Muscat using SIDRA model. The performance measures include Degree of Saturation (DOS), average delay, and queue lengths. The geometric and traffic data were used for model preparation. Gap acceptance parameters, critical gap and follow up headway, were used for calibration of SIDRA model. The results from the analysis showed that currently the roundabout is experiencing delays up to 610 seconds per vehicle with DOS 1.67 during peak hour. Further, sensitivity analysis for general and roundabout parameters was performed, amongst lane width, cruise speed, inscribed diameter, entry radius and entry angle showed that inscribed diameter is most crucial factor affecting delay and DOS. Up gradation of roundabout to fully signalized junction was found as the suitable solution which will serve for future years with LOS C for design year having DOS of 0.9 with average control delay of 51.9 seconds per vehicle.

Keywords: Performance analysis, roundabout, sensitivity analysis, SIDRA.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1097375

References:

[1] I. M. Mazharul, and A. Y. S. Al Hadhrami, “Increased Motorization and Road Traffic Accidents in Oman, ” Journal of Emerging Trends in Economics & Management Sciences, vol. 3, no 6, pp 907-914, 2012.
[2] R. Akçelik, “Some common and differing aspects of alternative models for roundabout capacity and performance evaluation,” International Roundabout Conference, Transportation Research Board, Carmel, Indiana, USA, May 2011.
[3] F. Xu, and Z. Z. Tian, “Driver Behavior and Gap-Acceptance Characteristics at Roundabouts in California,” Transportation Research Record: Journal of the Transportation Research Board, No. 2071, pp 117–124, 2008.
[4] I. Chang, S. Y. Ahn, and J. S. Hahn, “Analysis of Delay Reduction Effects on Modern Roundabouts according to the Entry Traffic Volume,” KSCE Journal of Civil Engineering, vol. 17, no 7, pp 1782- 1787, 2013.
[5] V. Sisiopiku, and H. Oh, “Evaluation of Roundabout Performance Using SIDRA,” Journal of Transportation Engineering, vol. 127, no. 2, pp143–150, March/April 2001.
[6] S. Manage, K. Suzuki, H. Nakamura, “Performance Analysis Of Roundabouts As An Alternative For Intersection Control In Japan,” Journal of the Eastern Asia Society for Transportation Studies, vol.5,pp 871 – 883, 2003.
[7] A. Ekman, “Calibration of traffic models in SIDRA,” Department of Science and Technology, Linköping University, Sweden, Thesis, 2013.
[8] Z. Li, M. DeAmico, M. V. Chitturi, A. R. Bill, and D. A. Noyce, “Calibration of VISSIM Roundabout Model: A Critical Gap and Followup Headway Approach,” In Proc. TRB 92nd Annual Meeting, Washington, D.C., January, 2013.
[9] R. Akçelik, “Lane-by-lane modelling of unequal lane use and flares at roundabouts and signalised intersections: the SIDRA solution,” Traffic Engineering + Control, vol. 38, no. 7/8, pp. 388–399, 1997.
[10] SIDRA, “Quick guide to SIDRA intersection 6,”Akçelik& Associates Pty Ltd, Australia, 2014.
[11] TRB, “NCHRP Report 572 Roundabouts in United States,” National Cooperative Highway Research Program, Transportation Research Board, Washington, D.C., 2007.
[12] H. K. Myre, “Praktisk uttesting av SIDRA for å vurdere kapasitets- og avviklingsforhold i rundkjøringer” Norgesteknisk-Naturvitenskapelige Universitet, NTNU, 2010.