An underground subway train tunnel with railway tracks.
Keywords
infrastructure,
safety,
direction,
technology,
urban,
perspective,
efficiency,
modern,
underground,
transit,
subway,
train,
track,
traffic light,
taipei,
mrt,
public transport,
rail,
maintenance,
industrial,
cable,
wire,
lighting,
dark,
corridor,
facility,
system,
operation,
vehicle,
electric,
power,
construction,
city,
travel,
commuter,
path,
subway,
structure,
station,
interior,
engineering