Addis Ababa Light Rail Transit (AALRT) contains 39 stations, nine (9) of which are elevated with help of bridges. A situation that could involve a truck accidentally or intentionally hitting a railway bridge pier in a metropolitan setting like Addis Ababa Light Rail Transit in Addis Ababa City leading to the collapse of the bridge structure would have serious consequences to not only the human lives, transportation in the city but also onto the entire Ethiopian economy. Bridges being overland structures that are designed to overcome an obstacle for the purpose of connecting communities are critical components of any rail road infrastructure therefore, the collapse of a bridge due to any cause would be extremely costly in terms of direct and indirect costs. Vehicle-bridge pier collisions are mostly extreme loading cases with a very low probability of occurrence during the lifetime of a structure that is usually associated with high disruption to traffic flow, especially in a metropolitan setting.rnA total of 276 piers were investigated to ascertain the extent of their vulnerability to vehicular impact load and it was found out that 6 piers corresponding to 2.174 % are highly susceptible to vehicle impact, while 269 piers (97.464%) are moderately exposed and 1 pier (0.362%) was of low exposure to vehicle collision. Further analysis of the highly and moderately exposed piers shows that by location, 35.273% are located along curved sections while 56.727% are located along the tangent section, 4.727% are located along roundabouts and 3.273% are at intersections.rnThe average damage ratio obtained from the piers along AALRT gave a damage ratio of 0.066 which is a very insignificant damage only capable of causing micro cracks at the impact location which is a clear indicator that the piers can be repairable (minor) without replacement of the concrete component or any major effect on the operation of the train. Basing on deformation as a serviceability requirement for structural performance, a deformation of up to a maximum of 6.4 mm is equally too small to lower the confidence of the train users as obtained from numerical simulations using ANSYS.rnRegression-based sensitivity conducted on combinations generated by Latin Hypercube used as input parameters to ANSYS which generated deformation, clearly indicated that vehicle speed is the lead cause of deformation while stirrup spacing is the most significant parameter in resisting deformation of the pier during a pier-vehicle collision.