英文關鍵字
access
accessibility
barrier
card
city
contemporary
corridor
design
door
entrance
exit
gate
indoors
inside
location
metal
metallic
metro
passing
pattern
platform
positive
public
railroad
row
russia
scene
security
sensor
sign
station
steel
stile
subway
system
technology
ticket
train
transit
transport
transportation
travel
trip
turnstile
undeground
underground
urban
vehicle
young