access
barricade
barrier
boundary
caution
closed
construction
control
cross
cross of saint andrew
crux decussata
danger
entrance
entry
equipment
exit
gambling
gate
gateway
guard
industry
protection
rail
railroad
railroad crossing
rails
railway
red
road
safety
saltire
sign
signal
steel
stop
street
striped
symbol
track
tracks
traffic
train
transport
transportation
waiting
warning
warning label
warning signal
way
white