advise
advisory
alarm
alert
announce
black
camera
car
caution
checked
control
counsel
curb
detect
detection
detector
device
dissuade
europe
foreboding
forewarning
highway
hint
information
law
limit
limitation
message
penalty
photo
police
radar
restrict
restriction
road
rule
safety
sign
signal
spain
speed
symbol
tell
tested
traffic
transportation
vehicle
vertical
warning
white