Yesterday we went to RFK stadium in Washington, DC to see the Nationals play the Astros. Seven of us (two dads and five daughters) made the 56-mile trip in just over an hour, with the trip computer recording average fuel economy of 23.8 mpg.
On the trip home, we found out too late that the Interstate had been shut down for hours due to a hazardous material spill. While it was "all clear" by the time we left the game, we still needed three hours to get home, lowering the trip computer's fuel economy number to a pitiful 20.4.
Sitting in idling traffic absolutely ruins your fuel economy.
On the plus side, we had a super time. Not only did the Nats win, we got to see Craig Biggio play an at-bat for the Astros, and outside the stadium we saw Teddy Roosevelt! He let us take a picture with one of our homemade signs:
So overall it was a really good day for all involved.