Around five per cent of motorists are running the risk of being thrown forward or through the windscreen in an emergency stop situation as they not fastening their seatbelt.
The AA's Streetwatcher volunteers have been observing junctions and roundabouts across the UK and logging 40,000 vehicles.
During the survey around one in 20 (4.92 per cent) drivers were found not to be wearing their seatbelt.
The survey also noted a range of other dangerous and illegal behaviour while driving as 3.6 per of vehicles had a brake light out and 9.57 per cent of drivers approached a junction too quickly.
Edmund King, the AA President, said: "Perhaps the biggest worry is that one in ten drivers was observed to be going too fast at junctions."
One area where drivers seem to be obeying the law is the use of hand-held mobile phones as just 0.23 per cent of motorists were spotted talking or texting while driving.
Posted by Emma Grange.
For the latest Kia deals visit Cars2buy.