We all know that the regenerative breaking on the Tesla Roadster works very well. If you're going down a mountain street, you will recuperate a lot of energy. Now a question came to my mind. Is it possible, that driving on mountain streets will give you more range? To simplify I list two options: a) Going 100 miles with ~50 mph on a flattish street b) Going 50 miles with ~50 mph up a steep mountain and 50 miles back down Were will more range be left? Option a or b? What do you think / are your experiences?