機器
blue
cargo
city
color
commuter
concept
deadlock
electric
equipment
fence
grass
gravel
green
industrial
industry
iron
journey
junction
lamp
lane
light
lights
locomotive
metal
permission
permit
rail
railroad
railway
red
road
semaphore
siding
sign
signal
sky
steel
stop
track
traffic
train
transport
transportation
travel
urban
vanishing
way
window
yellow