The case of Bogotá's public transportation transformation is becoming quite well-known. Every week Bogotá, Colombia has a car-free Sunday when people flood their extensive bikeway network on bike, foot, etc. and cram the buses and taxis to the hilt.
It's an interesting case, especially since the major transformation took place under the rule of neo-liberal Mayor Enrique Peñalosa who changed the city by putting emphasis on equity in public space, giving much more room over to public transportation and biking. In a city with only 20% car ownership it made a lot of sense, but it is even more incredible in a country renowned for its corruption, drug wars and murders.
In this video Peñalosa gives a lesson to NYC in doing more for cycling than just painting a white strip on the road.