asphalt
barrier
bend
border
bumper
countryside
crash
crash barrier
curb
danger
drive
efficiency
empty
fence
foreground
galvanized
guard
guarding rail
guardrail
infrastructure
landscape
metal
motorway
precautions
preventive measure
protection
protective
rail
railing
rebound
red
red reflector
reflector
road
roadside
rural
safety
speed
steel
sturdy
technology
traffic
transport
turn
verge
way
winding road