I wrote in my initial blog post about the success of the Bay Area's Clipper Card, which has integrated payment processing for two-dozen transit agencies and given commuters one easy card to use while they travel. Overall, the card continues to be considered a major systemwide success. The continued rollout isn't always smooth though, as evidenced by recent bickering over the potential use of Clipper on AirBART.
I'm not 100% confident my understanding of hypernym / hyponym. I think it follows the CS polymorphism paradigm. It might be unused to the new language to describe these things, so I want to ensure my understanding is right.
http://i.imgur.com/36ink.jpg