The Unimog in action for GVB Amsterdam for towing metro trains.
GVB, the Amsterdam municipal public transport corporation, is responsible for urban buses, ferries, the Metro and the tram network in the capital of the Netherlands, transporting approximately 875.000 passengers each working day. Recently the huge fleet of the GVB has had two new additions: two road-rail vehicles based on the Unimog U423 for maintenance and emergency operation; these ensure that rail traffic runs smoothly, in particular for the infrastructure of the new M52 underground line, which went into operation in 2018.
Doubling the tractive force by means of tandem traction.
One special feature of the road-rail vehicles which were converted by ZAGRO is the possibility of coupling the Unimog vehicles in an emergency, thus almost doubling the tractive force. This means that a metro train 120 m long and weighing approx. 200 t, on a gradient of over 4 %, can be towed effortlessly, for example out of a tunnel.