The LaseGCP-2D - Gantry Collision Prevention measurement system is a driver assistance system that helps crane operators avoid collisions and thus increase crane availability. The system can be used with two or four 2D laser scanners mounted on the upright gantries close to the drives. Depending on the number and mounting location, one direction of travel or two directions of travel can be monitored. The generated scan planes are generated horizontally across the floor in the respective direction of travel.