PBS hosts a great series about the economics of being environmentally conscious called e2. Their second season focused on design and it is narrated by Brad Pitt. One of the episodes focused on Bogotá as an example of a sustainable city. It features former Mayor Enrique Peñalosa who speaks about his efforts to reconnect his city through bike paths and the bus rapid transit system called Transmilenio.
Additionally, this episode and all of the second season is available on Hulu.