The grade separated trail sounds great in theory, but in practice it's surprisingly ineffective for some unknown reason. In Sweden we have a ton of those and for some reason bikers insist on participating in the death race with the other murder monkeys. Which is annoying because it can really slow the race down! But I guess once they have a good alternative, at least their death race participation is voluntary, and so I guess they're fair game like the rest of us
Seperate is not equal. Grade separated bike routes are often not the best routes.
We don't even fully grade separate rail based murder machines from tire based murder machines.