If these things were actually used to increase public safety I'd be all for them. Unfortunately our current system rewards corruption, so that's not the case. Speed and red light cams are never actually used for safety, they're used to extract money from the populace.
https://www.digitaltrends.com/cars/red-light-camera-controversy/
This article is about red light cameras rather than speed cameras, but corporations and municipalities (corrupt or just naive) can be trusted to find ways to fuck over the public for profit using the speed cameras too.
The key is stored in the BIOS (UEFI flash chip) - you can install 10 or 11 from the downloaded installers MS offers; as long as the Home or Pro is correct it'll activate just fine.
You can verify the key exists by running
hexdump -C /sys/firmware/acpi/tables/MSDM