When I lived in Layton a few years back at night the PD units would say switch to 3 and they would show up on 10560. Day time PW would be on it and when it snowed there was a lot of traffic. The same goes for TG 11264 in Syracuse, its public works durning the day and PD uses it at night for a second car to car channel. I haven listen to them much lately, so I don't think it has changed.
Scot