That's a more difficult problem to fix. In Sydney, there are quite a few cycle lanes popping up but are almost all dominated by enthusiast cyclists in lycra on sports bikes, and I'd rather cycle on a road than deal with them. In the Netherlands, of course, cycling is a normal every day thing so the commuters far outnumber the enthusiasts and it's safer for everyone (enthusiasts / sport cyclists don't even bother trying to cycle during busy times, they'd be constantly stuck behind commuters).