I bitch and moan about the Metro as much as anyone you can name. But overall I think it’s a good thing for the District and surrounding area. Now that the line out to Dulles is finally about to break ground another round of fighting is about to break out.
It seems to me, and not like I know a lot about anything, that even if it costs more a underground line is the best option. Going underground causes fewer problems with current traffic patterns for the five to ten years it will take to finish the extension. Going underground will prevent setting back the economic progress of Tyson’s Corner. Underground will mean a cleaner look to the area. Underground lines still function during snow storms. Underground tracks and stations are not abused by the elements year round.
The only real advantage of taking the train on elevated tracks is a short term savings. I have yet to see a project that didn’t suffer in the long term because of the so-called saving created by short cuts. One of the District’s biggest landmarks is the Metro rail system. Not taking the time to do the newest line right would be doing everyone a dis-service. Spend the extra money now if we need to.

(c) Washington Post