This summer, going the other way, I was out of battery for the trip from Frisco through the tunnel in my 07 Highlander.

We had stopped in Frisco for the night, and didn't have or take enough time to get recharchged before I got on the freeway.

The difference was that I couldn't run in the fast lane with the Porches and the turbo cars ( which I had been able to do all the way up to Frisco).

I was not crippled and stuck at 50 by any means. In general, since a large portion of your torque and horsepower come from the batteries, you are much more potent than the gas only folks at altitude.

Mark Mooney