I'm possibly making a road trip out to Washington DC and then Philadelphia (more like Philadelphia-ish, I think they're out in the suburbs) to visit some family and friends and I'm trying to get a ballpark idea of how long the drive would be, since I would be on my own and wouldn't be able to share the driving with anyone. Google Maps says that it's 13 hours and 40 minutes from here to DC, based on your experiences, are Google's estimates high, low or just about right? Obviously, I mean your experiences in general for any road trip, not STL-DC (although if you've done that drive, input would be appreciated!) I know it depends on how often you stop, but I would be able to make my stops few and quick. My car can go almost 400 miles on a tank of gas and I can wolf down a crappy fast food meal in a couple minutes And yes, I know flying is cheaper, quicker, and better in every way and somewhere in the middle of Ohio I'm probably going to say to myself "Dammit, I should've flown" but I need a quiet, relaxing drive for a change.