asphalt
attention
auto
automobile
background
car
caution
cone
cones
danger
denied
direction
drive
driver
driving
entry
halt
highway
instructor
law
learn
license
male
no
object
octagon
open
orange
outdoors
people
red
restricted
restriction
risk
road
safety
school
security
sign
speed
stop
street
student
symbol
test
traffic
transport
transportation
vehicle
warning