> Haven't been on one to verify use by ridership, or to see what the driver's reaction to noncompliant riders is.

Compliance is very high (>95%?), but the people who do not comply are basically the same people who were problems in the Before Times: belligerent, mentally ill, or both. The drivers almost always let them get away with it, again just as in the Before Times, probably because it's a risk to even interact with these people. I, for one, try very hard not to make eye contact with them or even look in their general direction; treating them like the Bugblatter Beast of Traal is at least moderately effective.

I do wish they wouldn't flash the stupid "Masks Required" on the route signs so often, though. It makes it a lot harder to tell which bus is actually arriving. And showing it on the route indicator on the _back_ of the coach is just spiteful.