Possible Clues:

• Impetuous writer in car lacking a vehicle safety feature?
• Strong protective structure in middle of a dual carriageway
• Cork spots could be a problem for trippy middle-of-the-road type offering protection
• Middle of the road safe type spots pub for old newsman outside
• Economic disaster is a stumbling block and it's down the road for everyone with cars!
• Reckless, heading for bend in lorry? This might get damaged
• Strong safety fencing
• Safety structure in centre of motorway
• Hit obstacle used as safety device
• Emergency measure keeping motorists on the way after a collision