I'm definately a proponent of increasing cycling and improving bike infrastructure around the city. As a driver, cyclist and downtown resident however I'm interested in bike advocacy groups really pushing for lane separations. I'm really not certain they are necessary or would provide an enhancement in safety or better sharing of the transportation network, particularly given the specific road network we have in the Old City of Toronto. The way that streets are set-up in the city there are any number of safe North-South routes to take on side-streets in mixed traffic. The only real problem we have is West-East. But I still don't see how a route like Harbord or College would be improved by having a curb separation. Frankly, while suburban arterial remain dodgy, I do not find biking (according to the rules of the road!) in mixed traffic in the old city of Toronto either dangerous or intimidating.