Abstract
ASSESSMENT OF THE EFFECTS OF GEOMETRIC FEATURES ON THE SAFETY OF ROAD USERS ON ADO-IJAN ROAD IN EKITI STATE, NIGERIA
Abe Omoloye Elijah and *Akinwamide Oluwayinka Glory
ABSTRACT
This study deals with the assessment of the effects of geometric features on the safety of road users on Ado-Ijan road in Ekiti state, Nigeria. In carrying out this study, field surveys of all the highway geometries on the road were carried out. The results of the survey showed that many of the highway geometric features fell short of standard value. For instance, the median provided up to location 2.0m ranges between 0.80m and 0.82m as against the specification of between 3.0m and 5.0m. The camber is 1in 30 as against standard value of between 1 in 50 and 1.40. Also the shoulders provided along the road is between 1.45m and 1.64m compared to 2.5m minimum standard value. Depth of u-shaped drainage channel, where provided, is also between 0.25m and 0.35m instead of 0.3m to 0.6m standard value. There are no provision for footpath, kerb and other highway geometry facilities that will enhance safety of road users on the highway. Stopping sight distance ranges between 36m and 80m. The camber, vertical curves and horizontal curves are not also adequate. Therefore, it was discovered that non-conformity to specifications of these highway geometric features has contributed immensely to the spate of accidents on the road.
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