From Another City, I'm strongly for That London building as much infrastructure as possible. That way we get to point to the good stuff and tell the council that's what we want (without mentioning the Netherlands, which is full of FOREIGNS and therefore an invalid model), and the rubbish can be ignored in the usual way.
We've had some success with this approach, in as much as they seem to have stopped wasting money on magic paint that serves only to make overtaking motorists leave less room. As for actually building decent segregated infrastructure, they're currently having a consultation about buying a spade, and expect a legal challenge. CS9 works as a model for this, too.