The DC metro area has a fantastic public transportation system. I feel sort of bad for not making use of it, but I'm running late for work almost every single morning and I can't afford the time to wait for the bus to arrive.
Really, the only problem I have with the area and my commute is the traffic on 270 between Frederick and Rockville. The region has expanded far beyond what that long stretch of two lanes can handle. Every single morning is a dead stand-still, regardless of accidents and whathaveyou. Thankfully, I don't have to use it very often anymore.