In the Philadelphia, the pro teams frequently use the river trail bike paths prior to the Philadelphia International Championships in June. I've talked to some of the riders and they say it's not a "training" ride for them. Rather, it's a relaxed ride to loosen up. Keep in mind that a relaxed ride for them can still be 18 to 20 mph. And, Frankly, I'd much sooner have a pack of them pass me than local wannabe riders who don't have the handling skills these pros do.