electric locomotive metro platform railways S-Bahn shuttle suburban train transportation care disability handicaps location mobility people on the move provision suburban train wheelchair access wheelchair seating wheelchair seating area ballast city commute commuter gantry glasgow overhead power rail railway station steel track travel work angles commuter train commuting dangerous electric lines electric rail system electric train electric trains electricity movement overhead lines passenger service passenger train passengers perspectives platforms rail transport railroad rails railway station service trains transport 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