He was fined £220 (plus £300 costs) and his driving licence endorsed with four points after he was caught using the hard shoulder to pass the moving road block.
The two traffic officers who set up the rolling road block told the court that electronic road signs had been set warning of debris in the road with advisory 50mph speed signs also displayed.
They had been asked to effect a rolling road block to allow colleagues 1/4 mile ahead to retrieve a set of ladders from the carriageway.
However, they noticed a driver coming up alongside the patrol vehicle in lane one.
They twice tried to get the driver to comply before he drove away in the hard shoulder − forcing them to radio ahead to delay the operation.