I found this somewhere else on the internet:

"As vehicles ran out of gas during the Houston exodus (aka biggest traffic jam ever), one Chronicle employee who drove a Prius completed the 30 hour, 170 mile trek on three-quarters a tank of gas.

Other happy hybrid owners who didn't have to stop for gas or turn off their A/C weigh in: "My folks drove to Austin from League City in their lexus hybrid and 21 hours of driving later still had 1/8 tank of gas left - plus they had my 87yr old grandfather with them and ran the air conditioner all day unlike most people who ran out of gas. 3 cheers for the hybrid!""


20-30 hours to go 170 miles. A cyclist in good shape could do the same distance in half that time. I know not everyone can complete double-century distances (I probably couldn't) but it still made me think a bit.