The existing barrier on bridges, having a wall thickness of 250mm is based on the initial standard of construction which follow the allowable stress design method. For the mass construction, reduction of onsite construction time and minimum traffic obstruction can be achieved by using of precast concrete construction. This research explores the structural behavior of precast concrete barrier by varying the wall thickness and verify its structural performance up to failure. A series of static loading tests were carried out to evaluate the validity of the proposed barrier. It is being observed from the test results, the designed strength and required structural response have been achieved by using the 150mm thick wall barrier. A finite element model technique in numerical modeling has been adapted to reproduce the designed structural response of the concrete barrier.