<p>I take a look at interstate travel in the US. Join me as I give some interesting facts about our 70 year old highway system.</p>

I take a look at interstate travel in the US. Join me as I give some interesting facts about our 70 year old highway system.

On the road again---interstate travel.

Dr. Shelley Griffith is a retired physician and columnist who enjoys helping people understand more about their health. He also is a dedicated researcher who likes to share thoughts about many topics that might be of interest for the general population.

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On the road again---interstate travel.

On the road again---interstate travel.