Hundreds of miles of British roads are inadequately marked, with over half of them barely visible to drivers and pedestrians.
The survey by the Road Safety Markings Association (RSMA) said Scottish and Welsh roads were some of the most poorly marked
The RSMA studied 483 miles of British roads, including roads managed by the Highways Agency and local councils, with 50.6% said to be barely visible.
Worryingly, 23% fell into the 'in need of emergency repair' category and less than 7% of markings achieved the highest ranking, showing a decline in condition, as the previous year 23% of centre lines achieved top scores.
Some of the worst road marking in England can be found on the M1, M6 and M18. In Scotland they were barely visible on the M9 and M90, while in Wales the A465, A487, A4112 and A4143 faired badly.
RSMA national director George Lee commented: "These findings are shocking. We could see a clear, direct correlation between deadly roads and deadly road markings when we examined the 10 most dangerous roads identified by the Road Safety Foundation."
Copyright Press Association 2012