The changes - blasted as a "disgrace" and "absurd" by critics - came into effect in November. The number of hours the cameras operate also tripled from 7000 hours per month to 21,000 hours and the fleet of cars have been stripped back to look like regular cars parked on the side of the road. Warnings signs were previously required to be placed 250m ahead of the mobile speed camera, as well as 50m after. As a result, the mobile speed cameras now look like everyday cars, with no indication a police officer is inside with a speed camera, and new data has revealed the brutal effect this has had on our wallets.