Just be a little "wary" of police position reports.
The cops are now going online and putting up false or misleading information to trip up drivers.
The police HATE Waze.
It's especially good on letting people know where unmarked cop cars are hiding in parking lots, behind a truck, and so on.
I was driving one day and had just driven past a spot when up popped a notification about a robot speed camera. So just for the heck I turned around and the cops that were setting it up were just leaving. This was on the highway to Phoenix and they put them in a little trailer.
So I gave a second report and the Waze icon got bigger.
Waze is great!