Overloading and It's Effect on Flexible Pavement

The ability of a pavement structure in carrying out its function reduces in line with the increase of traffic load especially if there are overloaded heavy vehicle passing through the road. This study was done to know the effect of overloaded vehicles on the road pavement and remaining service life of the pavement. In this study the service life and design of pavement due to overloaded vehicles is analyzed using the AASHTO 1993. In Narayanghat- Mugling road the composition of traffic seems to be 83.76% heavy vehicles 9.18% Medium vehicle and 7.05% light vehicle. For the direction of Narayanghat - Mugling the pavement service life might be reduced by 59.90% due to overloading condition while for the opposite direction the service life would not reduced caused by the same factor. The impact of overload conditions on the road pavement showed premature failure that is a condition which the damage reduced the life of roads before the design life of the road is reached. From the results it can be concluded that overloaded vehicles on the road are very influential to the reduction in pavement service life.