automatic
bar
barricade
barrier
block
boom
border
brick
business
city
closed
cone
construction
control
crane
detour
entrance
entry
exit
fence
fencing
gate
highway
icon
illustration
isolated
mechanic
metal
museum
object
obstacle
park
parking
protection
red
road
roadblock
rule
safety
steel
stop
street
striped
system
traffic
turnstile
under
way
zone