More than 100 vehicles have been stopped in an operation targeting road safety and seeking to detect and deal with road traffic offences.

Thames Valley Police Joint Operations Road Policing Unit worked in partnership with National Highways between July 25 and July 29.

Operation Tramline covered sections of the M4, M40, M1 and A34 where they deployed an unmarked HGV tractor unit to monitor vehicles from an elevated position.

This allowed officers to drive alongside vehicles to film unsafe driver behaviour.

This also meant that they were able to observe commercial vehicles which may often be hard to monitor while in patrol cars.

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40 vehicles were targeted for using a mobile phone while driving, 77 for not wearing a seat belt, 6 for careless driving, 5 for driving while not in proper control, 1 for driving otherwise than in accordance with a licence and 1 for failing to comply with a red traffic light.

In total 130 offences were issued to motorists.

Police also arrested three drivers on suspicion of driving while over the prescribed drug drive limit.

Inspector Scott Long of the Joint Operations Roads Policing Unit said: “We strive towards delivering a first-class service to the public and to further reduce the volume of those who die or who are seriously injured on our roads.

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“By utilising Operation Tramline, we have been able to deal with a number of motorists who were committing road traffic offences that are linked to the fatal four – driving whilst using a mobile phone, driving without wearing a seatbelt, driving or attempting to drive while above the legal limit or unfit through drink and speeding.

“Working in partnership with National Highways, we have a long-term ambition that no one should be harmed when travelling or working on the road network.

“Operation Tramline is helping to achieve that aim as we seek to reinforce appropriate and safe driving behaviour.”