15-11-2014, 03:35 PM
Abstracts: Roadside drainage channels perform the vital function of diverting or removing surface Water from the highway right-of-way. They should provide the most efficient disposal system consistent with cost, importance of the road, economy of maintenance, and legalrequirements. Drainage facilities are required to protect the road against damage from surface and sub surface water. Traffic safety is also important as poor drainage can result in dangerous conditions like hydroplaning. Poor drainage can also compromise the structural integrity and life of a pavement. Drainage systems combine various natural and a manmade facility e.g. ditches, pipes, culverts, curbs to convey this water safely. Thus, the design engineer needs procedures for designing various types of channels. Drainage design begins with the road location. Locations that avoid poorly drained areas, unstable soil, and unnecessary stream crossings greatly reduce the drainage problem.