abstract
ahead
alarm
alert
arrow
attention
background
ban
banner
bicycle
blackboard
blank
board
caution
chalk
chalkboard
communication
crossing
danger
debar
design
direction
driving
effect
embar
forbid
forbidden
frame
glossy
highway
icon
indication
information
inhibit
interdict
junction
juncture
label
lane
law
mark
no
pattern
pedestrian
prevent
prohibit
prohibited
proscribe
protection
protest
red
reflection
restrict
risk
road
safety
sign
stop
street
symbol
tag
texture
traffic
transportation
warning
white