alert

animation

attention

background

barrier

black

border

boundary

build

caution

color

cone

cones

construct

construction

danger

equipment

forbidden

highway

icon

illustration

industry

isolated

marking

motion

object

obstacle

orange

plastic

reflection

repair

road

safety

security

sign

signal

simple

single

site

stop

street

striped

symbol

traffic

transportation

under

warning

white

work