A motorist was caught driving at 100mph in a 50mph zone on the M1 motorway in South Yorkshire.
The Institute of Advanced Motorists released the figure as one of the worst examples of excessive speeding caught on safety cameras across England and Wales in 2014.
It revealed the driver was clocked on the southbound stretch of the motorway near Junction 31.
Britain’s two worst speeders were caught at 146mph, both by Kent Police on the M25.
Sarah Sillars, the IAM’s Chief Executive Officer, said: “It is disheartening to say the least that some road users are showing such disregard for the safety of all other road users – pedestrians, cyclists, motorcyclists and other drivers.
“At speeds of 140mph an individual is travelling at nearly two-and-a-half miles a minute. At that speed it is simply impossible to react to anything that might happen in front of you.
“It is also impossible to handle corners, gradients, street furniture and junctions with any effectiveness. In short, all these individuals are playing with their own lives and others.”