alps
asphalt
barrier
black
blue
boundary
brick
danger
dark
day
dividing
entrance
equipment
europe
european
fence
grass
green
highway
hill
horizontal
information
light
lighting
limit
line
mountain
nature
nobody
number
outdoor
parking
red
road
rock
security
sign
sky
stone
striped
symbol
tourism
traffic
transportation
travel
tunnel
warning
white
yellow