if pitfalls in roads are visible some patchwork can save vehicles and travelers but crack in rails ?
Rail fractures Rail fractures occur when a small crack turns into a larger one, usually because of the pressure of heavy bogies traveling over it. Indian Railways, which maintains 115,000 km of track around the country, is particularly prone to it in the season when there is a significant difference between the maximum and minimum temperatures in the day, since those cause the tracks to expand and contract. Poor maintenance and fitting could also be the cause of a small crack that over time could turn into a separation of rails. The result is a break in the tracks, which causes the bogey to...
more... go off the rails, affecting all the coaches behind it as well.