Victoria Police Chief Commissioner Graham Ashton has been caught speeding on the Peninsula Link freeway in Melbourne's south-east.

Mr Ashton was caught by a speed camera at Moorooduc on December 13 going 108 kilometres per hour in a 100kph zone.

He will be docked one demerit point and fined $190.

In a statement, Mr Ashton said he was "embarrassed" to have gone over the speed limit.

"As Chief Commissioner of Police I am deeply committed to road safety and am embarrassed and disappointed to find I have gone above the speed limit," he said.

"This was as a result of a lapse in concentration, which does not excuse my actions, but does highlight the need for constant attention behind the wheel."

He said he should known better having spent time with the victims of road accidents caused by excessive speeds.

"As Chief Commissioner I know the dangers of straying even a little over the speed limit," he said.

"Speeding contributes to approximately 30 per cent of all road traumas in Victoria and those extra few kilometres over matter.

"I regret my actions and believe I should be held to a higher level of accountability than the general community."

Road Trauma Support Services Victoria chief executive Cameron Sinclair said all drivers needed to adhere to the speed limit.

"I commend [Commissioner Ashton] for going public and taking responsibility and taking due accountability for what he's done," he said.

"I think it's a very pertinent lesson that everybody, every road user is vulnerable and prone to making mistakes.

"Nobody is 100 per cent safe, 100 per cent of the time."

Assistant Police Commissioner Doug Fryer last week said that speeding was one of several high risk behaviours that had contributed to Victoria's 2015 road toll.

Commissioner Ashton said he would make a donation to Road Trauma Support Services in addition to paying his fine.