Mass transit fans, please take note
The power of voluntary interactions and self-organizing systems continues to amaze. Read about slugging.
Slugging is a term used to describe a unique form of commuting found in the Washington, DC area sometimes referred to as "Instant Carpooling" or "Casual Carpooling". It's unique because people commuting into the city stop to pickup other passengers even though they are total strangers! However, slugging is a very organized system with its own set of rules, proper etiquette, and specific pickup and drop-off locations. It has thousands of vehicles at its disposal, moves thousands of commuters daily, and the best part, it’s FREE.
For the rules and etiquette, see here.
(I may be super-naive, but why can't the City of Angels emulate this?)