As gas prices are rising, more and more people will make the smart decision to use transit. Walk Score has released its first ranking of 25 U.S. cities by how transit-friendly they are, not only in the quantity of transit options, but by how accessible they actually are to citizens. They determine this using some pretty sophisticated algorithms and heat maps (more on that below), making it easier for people who are moving to pick a new home that has good accessibility to transit, and easier for city officials to figure out what the transit weak-links are in their cities.
Read more here: http://www.treehugger.com/public-transportation/walkscore-ranks-25-us-cities-transit-friendliness.html