I've been sitting reserve on the bus in dc since December, and commute. Some trips do originate in BWI and DCA, but short call gives you 2 1/2 hours to show. Train between IAD and DCA is 2 hours at the WORST, more like 1:15 or 1:30. Public transit from IAD to BWI is awful. I've tried it twice. The quick trip was 3 1/2 hours. BUT, company pays extra per diem for BWI trips cause they know it's a pain in the butt to get to. You get an additional $138 tacked on to your per diem for any BWI trip, and that will cover a super shuttle from IAD and hotel. Reserve sucks, but the three airports are doable. Also, I've yet to have a short call assignment that sends me up to BWI, fwiw...