I took my smart over a mnt this pat weekend. She did just fine. It was nice out and I did not have the A/C on. The speed limit was 45 and I went over at 55 mph just fine. She didn't struggle at all. Next week, however, I will be a lot of and much more steeper mnts. I fully expect everyone to be passing me. Of course they always have, I've never been a fast driver.
