Suppose there is an accident or fire in one of the tunnels of a metro-system in a city. How does the fire brigade gets there? Well, in Frankfurt am Main in Germany they have a good solution since decades. They have a pair of fire engines that not only can drive on the road, but also on rails. Between the normal wheels they have a set of train wheels. On pre determined points at the tunnel entrances they can put this engine on the rails and drive right into the tunnels. Today, already the 3rd generation of this type of rail-route engines is in service in Frankfurt. The Iveco 190.32AH on this picture is from the 2nd generation and was build in 1986 by Magirus.