TY - JFULL AU - D. Muley and H. S. Al-Mandhari PY - 2014/1/ TI - Performance Evaluation of Al Jame’ Roundabout Using SIDRA T2 - International Journal of Architectural and Environmental Engineering SP - 1295 EP - 1301 VL - 8 SN - 1307-6892 UR - https://publications.waset.org/pdf/9999988 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 96, 2014 N2 - 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. ER -