There's a psychological oddity that comes into play at this point. People live in College Park and take a job in Tysons and think, "I'm still a Washingtonian. I don't need to move, I just need to get across town." From there it's a short step to, "It's my inherent right as a Great American to get across town quickly, because a fast commute is right there in the constitution. So why can't those &(%*#&+#@! politicians get the &(%*#&+#@! beltway fixed?" And never mind that it would be closer and faster to drive up to Baltimore.
My advice, as always, is to live within five miles of your job. Life doesn't always work out that way, but if we could get more people thinking in those terms, it would get an awful lot of people off the arterial roads. Living close to work should be the default option. We need to concentrate on building neighborhoods that make it an attractive option for more people.
I think my current job has become pretty permanent for me, sine there are few private sector opportunities for a 51-year-old, thanks to corporate youth worship.