"Urban rail" . . "urban/metropolitan rail" . . . . . . "rail transit" . . "urban transit" . "Rail" . "urban-metro railway" . "transit" . . . "Urban rail transit" . . . . "rail-transit" . "metropolitan railway" . . "rail" . . . . "Urban Rail" . "urban railway" . "S-Bahn" . "metros" . . "metro" . "urban transportation" . . . . "urban rail" . . . "Urban rail transit" . . . . . "urban rail transit" . "Urban rail transport" .