Planetes writes: The state of Washington and Seattle metro areas have inadvertently found a possible clue regarding how to begin weeding Americans off their addiction to the car. The answer? promote mass transit. Obvious you think? How about throwing in a twist: Close several lanes of I-5 Northbound (the main North-South artery between Seattle and points south) just south of downtown Seattle. Not for hours, but for weeks. The result: light rail ridership doubles along with most other forms of mass transit in the area. So, to repeat: how do you wean people off the automobile? Make it useless.