That's a cool website. I never realized how drastic some of the elevation gradients were.
My normal commute to work - 16.5 miles; 663' net elevation change; 3 stop signs; 21 stop lights; .5957 gallons; 27.7 MPG.
My normal commute home - different route to avoid city traffic - 18.5 miles; -663' net elevation change; 2 stop signs; 9 stop lights; .5 gallons; 37 MPG.