Uh, there's a HUGE difference between 75% of TRIPS being taken by modes other than a car, and your terribly misleading headline of "D.C. wants three out of every four Washingtonians car-free in 20 years." You're making it sound like the goal is eliminating 75% of all cars in the district, which is a monumentally huge difference. For example, when we had a car in DC, we took probably 8-10 trips a day between my wife and I, yet the car was used for probably .5 or 1 trips per day, averaged over a week. See the difference?
Thanks, John! Hope this will help calm some of the anxiety by folks who think that DC wants to get rid of all of their cars in 20 years. It's a relatively small mode shift, as you point out, and doesn't at all mean that we need to get rid of 100,000 cars or anything — just shift about 16-17% of all trips onto other modes. Folk can keep their cars! But a lot of people will choose to either drive a bit less, or maybe sell 1 of 2 cars or go car-free entirely. Because of how easy life will become without it — not because of some government fiat to take 'em away!
Steve D