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Design Of Overhead Roadway At Road Intersection
[Full Text]
AUTHOR(S)
Raji, S.A., Oguntayo, D.O, Sherrif, U., Awolola, A.
KEYWORDS
capacity, flow rate, intersection, LOS, overhead-roadway, peak hour factor, staad-pro
ABSTRACT
This project deals with the Design of overhead-roadway located at CHALLENGE junction which is a T-junction. Analysis of the existing conditions was carried out to proffers solution to the cause of the problems occurring due to the vehicle competing for space at this intersection. Before carrying out the analysis, a traffic surveys at peak hours, for morning (07:30 to 08:30 am) and afternoon (03:00 to 04:00 pm) were conducted using 15 minutes interval. From the analysis, it was found out that the peak hour factor and flow rate was 0.88 and 1656pcphpl respectively, corresponding to LOS E. This implies that the capacity of the existing road is no longer able to accommodate the traffic flow; hence, overhead roadway was introduced to improve the efficiency of the intersection. The overhead-roadway is of 140 m length with 7 spans, 20 m per span. It consists of a deck slab, longitudinal girders, cross girders, deck beam, pier, foundation and retailing wall. All structural parts for this Flyover were designed using Staad professional software package and Manual method.
REFERENCES
[1] Adeleke, O.O. and Jimoh, Y.A. (2011) “Sampling of Intersections for Traffic Delay Study in an African Sub Region Urban City” Epistemics in Science, Engineering and Technology, Vol.1, No. 3, 2011, 131-137.
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[4] BS 8110 “Structural Design with Reinforced Concrete, British Standards Institution” Part 1, 1997.
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[6] Highway Capacity Manual “Special Report 209, Transportation Research Board” National Research Council, Washington, D. C. 2000.
[7] Salatoom, N., Taneerananon, P. “A Study of a Flyover-Bridge - Improved Intersection” ENGINEERING JOUR-NAL Volume 19 Issue 1, 2015.
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