ahead
alarm
alert
attention
background
beware
black
car
caution
climb
control
danger
dangerous
down
downhill
drive
grade
highway
hill
information
metal
mountain
nature
navigation
park
post
road
roadside
roadsign
safety
sign
signal
signpost
slope
steep
street
symbol
thai
traffic
transport
transportation
travel
triangle
truck
vehicle
view
warning
way
yellow