Seattle's Sound Transit agency wants to build more light rail extensions. They claim that 28,000 riders a day would use it. Of course, they also claimed that by 2010, 105,000 riders would be using their light rail lines. Oddly, that hasn't happened.
But hey, a one-bedroom apartment can be had within walking distance of their Capitol Hill light rail station for a mere $2700 per month (walking distance = about 15 minutes).