In theory. It just depends. When I lived in northern Virginia I could have in theory taken the bus to the metro to work and back again. Only problem was that my bus route didn't have parking at the closest pick up which would have required a mile hike each way from my crib, and the bus line I was on didn't go to the closest metro station so it would have added a mile walk plus 45 minutes to my already over an hour commute each way. I just drove to the closest metro, paid for parking, and took the subway in. The subway in NYC is pretty awesome in being able to put you close to where you need to go. Everywhere else I have used mass transit, it pretty much blows.