Here's a good article on the Energy Bulletin of the Post Carbon Institute about what creates community in the city of Montreal. The Bixi bikes and the cycling network are part of it!
Montreal: City of Bikes
by Sven Eberlein
Last year I visited Montreal to attend the Ecocity World Summit, a biannual gathering of visionaries from around the globe committed to creating cities where people live in mutually enriching relationship with each other and with the Earth. Looking at cities as living breathing organisms, with all their residents — human and non-human — forming an intricate web of interdependence, the very idea of an ecocity is rooted in a sharing principle, where citizens understand not only the physical value of making the most of our natural resources, but the cultural, spiritual, ecological, and ultimately, economic value inherent in building networks and communities.