More than 387 offences were recorded during a week-long operation by National Highways and police, in which officers patrolled the M6 in unmarked HGV cabs.
Among the offences detected during Operation Vertebrae were 98 drivers using their mobile phone and 100 people not wearing a seatbelt.
Officers also stopped a lorry with six defective tyres and an excess load of approximately 15 tonnes. Lancashire Police reported the driver for the traffic offences and the HGV was taken off the road.
In total, 412 vehicles were stopped by police using the unmarked cabs, supplied by National Highways, including 180 HGVs and 122 private vehicles.
Action taken ranged from words of advice or fixed penalty notices to traffic offences being reported and even six arrests.
Jeremy Phillips, National Highways head of road safety, said: “Our goal, through exercises such as Operation Vertebrae, is to make our roads safer, by encouraging motorists to consider their driving behaviour or ensuring those that put people at risk are fully aware that they can be spotted and will be dealt with by our enforcement partners.
“It is always disappointing when we learn of drivers putting themselves and others at risk through unsafe driving such as using a mobile phone at the wheel.
“But through this week of action police were able to identify almost 400 offences and halt drivers who could have caused collisions and harm if they hadn’t been pulled over.”
The unmarked HGV cabs are loaned to police forces across the country throughout the year as part of Operation Tramline which was launched in 2015 by National Highways, then Highways England.
More than 29,000 offences have been recorded to date by officers in the HGVs since the national safety initiative began.
National Highways recently released footage of one driver caught using his mobile phone as he drove along the A500 in Stoke-on-Trent.
The driver is seen with his phone in one hand and a drink in the other before taking both hands completely off the wheel to put down his drink and move the phone back to his right hand.
In a second clip, a lorry driver has both hands in a tobacco pouch and then rolls a cigarette as he drives along the M40 in Warwickshire before looking over to see the camera rolling in the HGV next to him.
Comment on this story