A Highways England initiative to improve road safety on the M1 helped to reduce collisions by almost a third.
In May this year, three HGV supercabs spent a week on the motorway to capture dangerous driving. They were used by six police forces.
What impact did the initiative have?
Highways England found that during the initiative, incidents fell from 90 during the previous week to 64 during the week of action.
So the week of action helped reduce collisions by almost a third.