Due to the proliferation of unmarked police cars and unmarked mobile speed cameras (parked cars) with no warning signs, it is now necessary to take it one step further and use the video feed from dash cams (both front and rear) and character recognition to automatically tag a police vehicle by its registration plate (after that registration plate has been manually tagged). If a user is travelling with that vehicle, the vehicle's location would be updated live. Once that user breaks away from the police vehicle, the location would then be picked up and updated live by other Waze users who have detected the tagged registration plate.

To manually tag a registration plate, the user would report a police vehicle as normal, but the next screen might list all the current registration plates in view and the user would simply click a button next to the appropriate pre-filled selection. It might even be possible to take a snapshot of the front/rear dashcam views when the "report" button was selected so that the user can manually fill out the registration plate later on, when it is safe to do so (i.e when stopped).

The system could work on "votes" where as long as the number of "thumbs up" votes exceed the "thumbs down" votes, the registration plate is linked as being a police vehicle. This would also ensure that the police themselves couldn't un-tag their registration plates.

It may also increase the accuracy of tagging. If a tagged plate is no longer where it was last seen (perhaps after a set period of time, or if the plate is seen elsewhere), it will automatically be removed from that location and would reappear when the next user's Waze picks up the plate's new location.

I believe this could potentially help save lives, not only because it will make drivers more aware of police vehicles and drive more carefully, but also because they will be less likely to be taken by surprise as their dashcam will be able to automatically recognise a parked vehicle as being an unmarked police car or mobile speed camera. Drivers are sometimes prone to behaving erratically when they suddenly realise a parked car is a mobile speed camera, whether they are speeding or not, and will slam on their brakes and/or drive well under the speed limit. Hopefully this feature will reduce the likelihood of this happening.