railway vehicles railway transport 130 history 39 locomotives 33 railway lines 28 car trucks 20 railway structures 18 more ... electric traction 17 construction 17 rails 13 mechanical engineering 13 trolley cars 12 simulation and modelling 11 line locomotives 9 models 8 traffic safety 7 železnice 7 dynamics 6 electric drives 6 urban rail transport 6 steam locomotives 6 tramway transport 6 narrow-gauge lines 6 means of transport 5 mathematical models 5 underground (transport) 5 optimization 5 road vehicles 5 testing of machines 5 maintenance 5 less ...