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attention
background
black
caution
connection
crossroad
danger
design
direction
driving
flat
graphic
hazard
highway
icon
illustration
intersection
isolated
lane
law
merge
merges
merging
modern
policy
right
road
roadsign
safety
sign
signage
signal
simple
straight
street
symbol
symbolic
traffic
transport
transportation
travel
two
twoway
warning
way
white
yellow