arrow
asphalt
attention
black
blue
caution
construction
cow
curve
danger
direction
drive
hill
landscape
left
long
mountain
narrow
nature
outdoors
park
red
road
road sign
roadside
roadsign
rural
safety
sharp
sign
signal
sky
slope
steep
street
symbol
traffic
transport
transportation
travel
triangle
turn
under construction
urban
view
warning
way
weathered
worker
yellow