Have you considered how traffic affects your personal productivity and our nation's economy?

Here is a segment from Wikipedias page on traffic congestion:
"The Texas Transportation Institute estimates that in 2000 the 75 largest metropolitan areas experienced 3.6 billion vehicle-hours of delay, resulting in 5.7 billion US gallons (21.6 billion liters) in wasted fuel and $67.5 billion in lost productivity, or about 0.7% of the nation's GDP."