abandoned
background
block
border
boundary
buffer
closure
concept
conceptual
construction
crossing
danger
dead
deadendroad
end
gravel
light
limit
limitation
line
metal
nobody
old
prohibited
rail
railroad
railway
ram
red
restricted
restriction
road
safety
sign
signal
sky
steel
stone
stop
track
traffic
train
transport
transportation
travel
weather
white
withered
wooden