For a faster rider doing my route i would say someone could easily average 20+ mph doing my ride. I'm slow and I average 11.5 mph for a 7.5 mile ride. However, there are a lot of things in favor for a faster ride. First of all, if someone rode on the road doing my route, they wouldn't really have any stops to slow them up since all the traffic light intersections have pretty much been replaced by roundabouts. Second, I'm in Indiana and there are really no hills on my entire route. Sure there are some inclines but most of you would consider them speed bumps not hills. I've talked to a few others around here that are bike commuting and most of them seem to be in the 10 -15 mph range but they also say they aren't really pushing it. I don't ride the roads and use our MUP system to get around so I do get slowed up at the roundabouts since I'm using the crosswalks to go through them but I still get through them pretty quickly.

I do see how someone could do the 20+mph average but I would think they have some pretty nice conditions that work in their favor. I'd rather take me time and enjoy the sights and sounds.