cars commute commuter train commuting electric rail system electric train limits parallel road and rail transport passenger train rail road road vehicles speed train transport travel trucks angles dangerous electric electric lines electric trains electricity movement overhead lines passenger service passengers perspectives platform platforms rail transport railroad rails railway railway station service station suburban trains transportation urban voltage wire wires wiring Australia commuter-train electric-lines electric-rail-system electric-train electric-trains overhead-lines passenger-service passenger-train people rail-transport railway-station