alert
alongside
background
barrier
beam
beams
black
bump
car
caution
collision
construction
country
danger
drive
fence
fender
frame
guard
guardrail
hazard
highway
infrastructure
lane
line
metal
outdoors
pedestrian
protection
rail
rails
risk
road
safety
sharp
sign
steel
stop
street
symbol
track
traffic
transportation
truss
warning
way
yellow