background
black
block
blue
building
concrete
construction
distance
embankment
figure
grass
gravel
green
hundred
infrastructure
limit
line
marking
material
measurement
meter
number
old
outdoor
painted
pale
peeled
picket
pile
point
pole
railroad
rails
railway
road
roadside
rough
route
segment
seven
sign
sky
stone
stretch
support
track
train
transport
travel
white