Road and rail line projects include the construction of culverts and minor bridges. Siting considerations and investigation of catchment area are important in determining the location of these structures. The setting out process for these structures involves using 4 masonry pillars, two in the direction of the road. Construction methodology for minor bridges and underpasses include surveying and setting out works. Video tutorials for minor bridge construction and reinforcement can be found online. When constructing, stakes are set at designated points to aid in the excavation process. Both culverts and bridges serve the purpose of providing a transportation route over obstructions, but have different span lengths and methods of layout for construction.