Motorists in the UK have forked out over £526 million in speeding fines since 2013.
A single speed camera in Bristol has taken over £4 million since 2014.
The camera, which is located between junctions 19 and 20 of the M4 motorway, is the biggest earning speed camera in the UK.
The M25 accounted for more than eight variable speed cameras with a high volume of fines, taking more than £7.83 million from over 78,272 speeding fines issued in the last three years.
One of the busiest cameras is located on the A1 at Great Ponton in Lincolnshire. On average it issues £1,661 per day in fines.
Over a year, that works out at a staggering £606,265.
The figures come from a study by motoring insurance company Confused.com, which attributed the staggering numbers to the number of smart motorways in Britain.
This vast sum was taken from more than 210,538 motorists who were caught speeding, with some of them paying fines of up to £2,500.
Amanda Stretton, motoring editor at Confused.com, said: "There seems to be a perception among drivers that variable speed cameras on smart motorways are there to catch people out, and it's no surprise with up to £526m in fines issued last year alone.
By Aidan Rennie-Jones