Puzzle for March 3, 2010

The recent snowstorm which covered the northeast snarled cross country traffic with blinding flurries and icy roads. At one point I was able to speed up to a rate of 2 minutes to the mile.

How fast was I going in miles per hour?

How long would it have taken me to drive from my buddy's house at mile marker 352 to where the snow stopped at mile marker 477?