Shadow Chancellor Ed Balls says it was "bang to rights" that he paid the price for speeding in West Yorkshire.
The Morley MP said he was going 56mph in a 50mph zone on the motorway in his constituency when he triggered a camera on the M62.
Joking that he had been going "too far, too fast" - a favourite attack line against the coalition's austerity measures - Mr Balls said he had paid a fine and attended a speed awareness course rather than accept penalty points.
"Like many local people, I was caught out by the never-ending roadworks on the M62. Pulling on to the motorway at Morley I realised too late that the speed restrictions were still in place," he wrote on his blog.
"I was caught and bang to rights - doing 56 in a 50 mile restriction zone. Going too far, too fast, you might say.
"The course was very professional and actually really worthwhile."