Smart speed cameras
Speed cameras that can only be set to detect one speed, which is fine for fixed speed limit areas like 30 miles an hour, but doesn’t really work for national speed limit zones. In national speed limit zones cars can drive at up to 60 miles an hour but lorries are supposed to drive at 50 miles an hour. This means that lorries could break the speed limit without the cameras being able to detect it.
A smart speed camera could scan the approaching vehicle and know what speed it should be going based on the size of it’s profile.