I disagree. I train/ride on the SART almost daily and have yet to have any accidents with other patrons on the trail and that's with riding at speeds ranging from 15-34 mph. What other completely flat roads can I find to do long intervals without interruption? Plus the river trail is less than a half a mile from my house. You can enjoy noodling around on the trail (or any speed you feel like) and I can enjoy going as fast as I feel like (until the police start ticketing riders for going over 10 mph--hah!) and being predictable to all users of the trail.

If anything it should be a requirement for ALL patrons of the trail to be predictable and constantly aware of their surroundings. That's all that should be to it.