CCTV shows the red van swerving between lanes and hitting a number of vehicles.
Aidan McAteer hit Violet-Grace Youens at 83mph in a 30mph zone and then stepped over her body to flee from the scene of his horrific crime.
Up to 3,000 law-breaking drivers have been filmed by police from a fleet of three Highways England-funded HGV cabs in the past year.
The driver, who had her toddler in the back, was jailed for 26 weeks and banned from driving for three years.
A grief-stricken family have shared the heartbreaking impact of using a mobile phone whilst driving, as strict new measures take force.
The victim was lucky to be alive after being run over twice following a confrontation.
A driver has broken the record for the most penalty points racked up while still using his vehicle.
Drivers who tailgait or lane-hog will face tougher fines as changes to police powers to issue fixed penalty notices are brought in today.
Dodgy drivers could be fined £100 and have three penalty points slapped on their license if they are found hogging the middle lane of the motorway or driving too close to the vehicle in front of them.
The most serious cases of bad driving will go to the courts but police will be able to offer educational training as an alternative for the penalty points.