It's 4:30 p.m. and my plane has just landed at Logan. In 15 minutes, I'll be in my car but it could be two hours before I'm home. I live 20 miles from the airport but at this time of day there is just no fast way to my house. In short, my car is fueled for speed but there are roadblocks in every direction. Something similar could be said about the U.S. economy today.