Abstract: The invention concerns a pneumatic or hydraulic telescopic system comprising cylinders concentric at several diameters inserted in the vertical structure of the support pylons (1) and in the departure and arrival stations (14, 16), between the concrete pillar (1) and the nave of the station (15). The sensors are applied on either side of the vehicles (17, 19), facing their forward movement direction, having a reading angle including the entire width of the vehicles. The pneumatic or hydraulic telescopic system (2) is operable: in the support pylons, to adapt the vehicles at the appropriate levels as they travel, causing them to rise or drop depending on the contour of the terrain; in the stations, to compensate the tension of the cable if required. The sensors (18) are operable to analyze the contour of the terrain and inform the control center to actuate the system in accordance with the requirements.