The Bart is one of many public transport systems that I love. I have had the opportunity to experience the subways of Boston, New York, London, Amsterdam, Budapest and Barcelona. They make for amazing and accessible photo compositions. These designs have a huge impact on a city and it's dwellers and you know a good one when you use it. In my opinion the Bay Area is one of the better designed systems in America along with NYC and Boston. Not only is the subway system a big influencer but the advertisements, exhibitions and graffiti it houses are unique to each city and seen by the thousands of people that utilize it everyday...a great place for sarcastic, humorous, or serious messages to reach a community. I would love to have a deeper understanding of the user experience and research that goes in to creating massively public work, like these systems. I'm also just happy to live within reach of public transport! No more boonies of New England for me, for a while.