Rail gate crossing survey is to replace Present criteria of railway level crossings with over bridges/ underpasses are based on the product of gate closures and fast traffic per day. Information is to be obtained on the angle of crossing of the roadway and the railway. In case the road alignment has curves near the railway crossing, to make it a perpendicular crossing, an index plan including these curves and the straight alignment beyond, should also be included to study the feasibility of improving the road alignment as part of the project for replacing the level crossing.