CAPACITY ANALYSIS OF MOBIL, KPAKUNGU AND TUDUN WADA ROUNDABOUTS INMINNA METROPOLIS

Abstract

ABSTRACT This research addresses the most important element of operational performance of Mobil roundabout, Kpakungu roundabout and Tudun Wada roundabout: capacity analysis. The relationship between a roundabout performance measure and capacity is often expressed in terms of degree of saturation (demand volume-capacity ratio). For Kpakungu roundabout which comprises of Bida road, Dutsenkura road, Barkinsale road and Soje A road. Their entry volumes (vehlhr) are as follows: 990, 289, 711 and 234 respectively. Their capacities (vehlhr) are as follows: 779, 546, 764 and 535 respectively. Their control delay (sec/veh) is as follows: 710,46.0,32.0, and 0.6. Their level of service (LOS) is as follows: E, D, D, and B. For Mobil roundabout which comprises of Bosso road, Tunga road, Hospital road and Market road. Their entry vehicles (vehlhr) are as follows: 990, 789, 511 and 234 respectively. Their capacity (vehlhr): 779, 646, 564 and 335 respectively. Their control delay: 17.0, 56.0, 42.1 and 0.6. Their level of service (LOS): E, D, D and B respectively. For Tudun wada roundabout, which comprises of Mobil road, Chanchaga road, Radio.Niger and David Mark road? Their entry vehicles (vehlhr) are as follows: 940,249,621 and 334 respectively. Their capacities (vehlhr): 722, 446, 564 and 490 respectively. Their control delay: 61.0, 36.0, 22.0 and 13.0 respectively. Their level of service (LOS): E, D, D and C respectively. Based on this project a lot was achieved from the research, the physical layout of the entry the roundabout such as the entry width, inscribed diameter appeared to affect its performance and in addition car parks for commercial vehicles should be created at a far distance from the major road in order to reduce traffic delays at Mobil, Kpagungu rounabout and also expansion of the road for pedestrians.