While railway tracks are laid the engineers go away a small gap between rails. All metals make bigger whilst heated. If two railway tracks are laid together with none gap among them they may push against each different when they make bigger inside the day time due to the heat of the sun, and when they quiet down inside the night they will agreement and return to their original kingdom pulling against every other. This consistent pushing and pulling in opposition to one another after they warmness and expand within the day time and cool down and contract within the night will bring about the weakening of the joints among the two tracks and after a few days the 2 tracks can also smash free from one another. Such a scenario will result in the derailment of the trains causing important accidents and loss of lives.
So, the railway engineers constantly go away a small gap among two rails to catch up on the expansion of the rails for the duration of the new day time and contraction in the course of bloodless nights.
