A lifting system for vertical adjustment of a transportation system structure consists of a foot that is fastened onto the transportation system structure and a foot cradle. The foot is bounded on opposite sides by two foot surfaces that are arranged at a foot-surface angle to each other. The foot cradle has two complimentary supporting surfaces against which the foot surfaces rest. The supporting surfaces are vertically movable, allowing the foot and transportation system structure to be raised or lowered, and the vertical adjustment thereby takes place.