barrier
block
blocker
bollard
border
boundary
brown
column
concrete
crash
damaged
danger
dry
equipment
fence
frame
grass
gray
green
grey
guardrail
handrail
icon
leaves
limit
limiter
nature
one
outdoor
overgrown
parallel
parking
pillar
plant
plate
pole
post
reflector
road
roadside
safety
secure
security
sign
stop
street
structure
symbol
vegetation
walkway