The Indian Railway is one of the world’s largest railway networks comprising 117,996 km of track over a route of 66,030 km and 7,137 stations.
Crushed stones cover the entire tracks.
Well! There is scientific reason behind it.
Railway tracks are made up of steel and were previously supported by wooden ties which are now being replaced by concrete rectangular slabs known as sleepers.
Railway tracks are subject to heat expansion and contraction, ground movement and vibration, precipitation buildup from rough weather, and weed and plant growth from underneath.
The stones are well crushed in order to make sure that their surface is not smooth and that they do not slide over each other when the train is passing over them.