The safety of transport firm drivers such as those employed by specialist logistics companies is under threat because Highways Agencies are allowing road markings to deteriorate. This is according to a report published by the Road Safety Marking Association (RSMA), which looked at the quality of the UK's A roads, motorways and other thoroughfares. It discovered that almost a third of single carriageways now have lines so worn out that they do not meet legal standards, while one in five motorways and dual carriageways are unsafe because their white lines and other markings have worn away. This marks a significant decline in standards since 2008, the organisation said. RSMA national director George Lee said the roads in the worst state should be repaired, as the Highways Agency has clearly specified standards in place to keep drivers safe. "Road markings provide the best, most simple navigation aid to drivers, who must to be able to read the road at every turn ... motorists are driving blind when we can, in fact, save lives," he added. In January 2011, a study by the Asphalt Industry Alliance found that every mile of road in England and Wales had an average of ten potholes.