Heck, just leave the ALPR part out of the cameras altogether in order to save costs: have them upload the images to an ALPR service running somewhere in the cloud. You're probably already going to need the uploading part anyways in order to provide evidence, so why even bother with local ALPR?
Photo cameras would still be doing ALPR. Changing from "take a photo of cars that are speeding" to "take a photo of every car and only send tickets to the ones that are speeding" is a trivial software change that can be done retroactively at any point even after the cameras are installed.
> Heck, just leave the ALPR part out of the cameras altogether in order to save costs: have them upload the images to an ALPR service running somewhere in the cloud. You're probably already going to need the uploading part anyways in order to provide evidence, so why even bother with local ALPR?
How does this address the concern that they're going to use ALPR for location tracking? They would just do the same thing with the cloud service.
s/will/are/
Freedom to move around the city anonymously does not mean freedom to move around the city in a 2000kg, 100kW heavy machine anonymously.
Even the US recognises that the right to bear arms doesn't extend to an M1A1 Abrams.
Speed cameras in practice will use ALPR, and by the time the hardware capable of doing ALPR is installed, they'll then have the incentive to record every passing vehicle in a database whether it was speeding or not, and whether or not they're "allowed" to do that when the camera is initially installed.
It's like banning end-to-end encryption while promising not to do mass surveillance. Just wait a minute and you know what's coming next.