Most drivers are exceeding speed limits on motorways, a poll has shown.
The survey of 942 motorists by road safety charity Brake found that three in five (61%) admit to driving at speeds of 80mph or more on motorways - at least 10mph higher than the limit.
Findings revealed that more than one in five (23%) drivers reach these excessive speeds at least weekly.
According to the study, more than half of those polled (54%) are tailgating dangerously, with drivers following too close behind the vehicle in front, and 22% admitting to doing so at least once a week.
The charity stressed that risks for death or serious injury from crashes are 40% greater on a motorway than on other types of road, and one in five of all motorway accidents involve four or more vehicles.
According to the latest data, there were 132 deaths and 858 serious injuries on Britain's motorways in 2009.
Julie Townsend, campaigns director at Brake, said: "You might think you're saving time, but if you speed on motorways you contribute to congestion, and increase your risk of a catastrophic crash.
"For every mile per hour you drive faster, you dramatically increase your stopping distance, impeding your ability to stop in a crisis."
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