area
away
barbed
barricade
barrier
black
boundary
building
caution
closed
construction
danger
do
english
enter
fence
forbidden
guard
iron
keep
metal
notice
object
pedestrian
prevent
private
property
protected
protection
razor
red
risk
road
safety
security
sign
signage
signs
stay
steel
stop
street
thai
traffic
urban
warning
white
wire
yellow
zone