I always assumed that traffic cameras were open to the public by design. Why should only the police have access to them if the cameras are public-facing, funded by the public, for the public?

Seattle has a nice page where you can visualize camera locations on a map and access live feeds:

https://web.seattle.gov/Travelers/

I think this is great. There is no expectation of privacy in public. If we're going to have cameras at all, I'd rather they be open to everyone, instead of being gatekept by a select few.