Quote Originally Posted by MDHillSlug View Post

The issue of flat vs hilly is firstly an issue about ease of the biking effort and secondly an issue about visibility: how easily you can be seen by motorists. A flat but winding road may be more dangerous than a straight but hilly road.
True..I hadn't thought of that. I was mostly thinking about pace difference and visibility coming over a hill, and how much time an approaching car has to pass, particularly when those "hills" are really bridges with no shoulders...not that a few mph on my part would make a lot of difference when they're going 50+.