checkpoint
access
barricade
barrier
black
border
boundary
car
closed
construction
crossing
danger
design
entrance
entry
exit
forbidden
garage
gate
hurdle
icon
illustration
industrial
isolated
obstacle
park
parking
protection
railroad
restricted
road
roadblock
safety
secure
security
set
sign
stop
street
striped
system
traffic
transparent
transport
waiting
warning
white
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