on bumpy surfaces or rocky surfaces it sort of creates a bogging effect as if your tires are low on pressure, which causes you to have to push your engine more to get it going at a constant speed. Plus if it's bumpy, it's like a bunch of really small speed bumps trying to hunt you down. gravel you do bog which takes down your economy fast.
I don't like the roads that seem like a giant comb was ran through it while it was still wet. lots of noise, and tire wear, and heat generated and just not right at all, but I'm seeing a lot of new bridges with this type of concrete road. I like the black asphalt types with no noise, and any dips are really smooth and work with your suspension. Plus it makes any suspension feel like your in a Cadillac
