city

communication

commute

commuter

construction

contemporary

convenient

descending

destination

direction

empty

entering

entrance

escalator

evening

going

hour

late

male

man

means

metallic

metro

modern

movement

moving

night

passage

passenger

public

stairs

station

stepping

structure

subway

technical

technological

technology

town

train

transparent

transport

transportation

tube

underground

urban

view

walkway

way

working