(n) :
(rail transport) A rail laid parallel to a running rail to guide wheels through points, rail crossings, and round curves, to reduce wear and the risk of derailments such as those due to flange climb.
(n) :
(rail transport) A rail laid parallel to a running rail to guide wheels through points, rail crossings, and round curves, to reduce wear and the risk of derailments such as those due to flange climb.