city commute electric mass mass transit metro metro mover metro-rail move rail track tracks train train track transit transport transportation baffle gate bags closed control covered entrance exit faregate gate gates hooded hoods mass transit stations mass transit turnstiles movement control not used one-way people traffic passenger control passenger movement passengers pedestrian control railway station sealed signs turnstile turnstiles waist-high turnstiles Asia Asians chinese commuters commuting locals mass rapid transit movement moving MRT on the move people railway seated Singapore standing tourists travel travellers waiting platform