Dictionary - Ballast

Ballast Ballast

Ballast is a bed of pebbles placed on the railway track. Its main role is to transmit the stresses, generated by the passage of trains, to the ground, without the latter becoming packed down or deformed. But it also makes it possible to attenuate the vibrations caused by trains and to prevent vegetation from growing on the tracks. Although some tracks are now built without ballast, using other technologies, ballast remains a key component for the vast majority of railway infrastructure.

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