attention

background

barricade

barrier

blocked

blocking

border

bridge

caution

condition

construction

critical

danger

dangerous

dilapidated

engineering

fence

fences

fencing

fixing

hazard

improvement

industrial

metal

nobody

object

outdoors

paving

pedestrian

prohibited

protection

public

railing

railings

rebuilding

reconstruction

repair

road

safety

security

sign

signal

site

stop

symbol

urban

vehicles

warning

work

worksite