One advantage of a dedicated bike infrastructure is that there is next to no animosity between motorists and cyclists. Motorists are cyclists themselves and they've grown up with an inbuilt awareness of the needs of a combined traffic system.
Cyclists appreciate that the bike lanes are there for a reason and so they heed the traffic lights and only stray into the space reserved for cars when they have to. People are patient, and they respect one another's choices. Simple, really.