Hilton Kommunal delivered a suction vehicle for the longest tunnel in Europe in cooperation with the company Kaiser from Liechtenstein. This special vehicle is operated in the Gotthard tunnel in Switzerland to clean the irrigation system of the tunnel. The total weight of the vehicle is 50t. The rail drive system consists of 2 hydraulic driven bogies with 4 driven axles. The maximum speed on track is 40km/h in both directions. For backwards driving in the tunnel, the vehicle is equipped with special infrared cameras.  The suction superstructure includes an integrated water recycling system and is specially designed for the high ambient temperatures inside the tunnel during 24hour operation. The complete vehicle has been delivered including SBB and BAV certification.