Drivers on the M6 were caught trying to avoid detection while using their mobile phones.
People driving near south of junction 23 of the M6 at Haydock earlier this month were identified as committing seatbelt and mobile phone offences along the short section of the motorway. National Highways said there were 750 offences caught on camera.
It said this was the highest number at a single site in a study which has visited numerous sites across the Midlands and South West. At one point, a high-visibility camera placed in the roadworks south of junction 23 of the M6 at Haydock was spotting an offence every 90 seconds – compared to the average at all other sites of one every six minutes.