Police who ordered civilians to form a human roadblock to stop a speeding driver remain in their jobs despite failing to follow correct procedure, Victoria's top police officer says.

Chief Commissioner Ken Lay today said it appeared the officers involved in Saturday's roadblock - where drivers on the Hume were asked to blockade a section of the freeway - failed to follow normal procedures.

A man is taken into custody on the Hume Freeway in Melbourne’s outer north after he crashed into a blockade of people’s cars set up by police. Credit:Madhawa Mapa

"I've been briefed about this situation and to be perfectly frank, the circumstances that have been described to me in no way, shape or form conform to our policy," he said.