alert
arrow
attention
blue
car
caution
change
choice
cloud
clouds
concept
concepts
curve
design
determined
direction
directional
illegal
information
lane
law
metal
notice
object
options
restriction
return
right
road
roadsign
safety
selection
shape
sign
signpost
sky
space
street
symbol
traffic
transport
transportation
travel
turn
u
uturn
warn
way