We have a couple of small sections of guided bus way here; just enough to qualify for a grant on account of it being not-a-normal-bus, no siree. I think it's something 200 metres in total. But they're all totally separate from normal road. I've never ridden on them, on account of things like them not going anywhere terribly useful for me, having "car traps" (like heffalump traps but smaller), not wanting to get squashed by a bus, and of course because YACFers are all good, decent, upstanding, law-abiding citizens, but I have seen people cycling in them.
The bit shown above, however, I would probably have ridden in, even though that would make not a good, decent, upstanding, law-abiding citizen.