EVALUATION AND IMPROVEMENT OF ROUNDABOUTS IN CBD AREA AT SAMAWA CITY

The objective of this paper is the evaluation and improvement of traffic performance at the two selected roundabouts in Samawa city at CBD area. This is followed by suggestions of some improvement proposals, which vary from some of geometric improvements strategies. The video recording techniques is used to collect the traffic data for eight approaches. These data are abstracted from video films using EVENT program.

SIDRA INTERSECTION 5.1 software was used for evaluation and analysis of the two roundabouts and the best proposal was evaluated for the target year 2021.The results of the evaluation process showed that the two roundabouts was within a level of service (LOS) (F and E).By suggestion some of geometric strategies for the both roundabouts, the level of service has improved from (E and F) to (B and B) respectively for the both roundabouts. This results considered a reasonable and economy solutions for the existing problems at theses roundabouts.