Originally Posted by
Hypno Toad
Not the collisions I've seen. Slow moving bikers with little experience are most likely to collide with foot traffic and other bikes. Most (not all) fast moving bikers are experienced and know how to brake and maneuver around issues. An experienced rider can stop a road bike in a very short distance, when needed.
That being said, the MUP is no place for TT training.
The experienced riders will judge a situation before getting to it. And, presumably mostly have control over their bike. Of course, there are young riders who may choose to ride far too fast in the wrong situations.
However, stopping distances increase with speed... non-linearly. So, a rider might be able to stop on a dime at 10 MPH, but it can take 30 or 40 feet at 30 MPH... on a good surface.
This is more or less theoretical for a car, but the idea is the same. The faster you go, the further it takes to stop, and it is non linear.
Physics / Conservation of Energy
There is also reaction time, which this doesn't take into account. Perhaps the experienced riders react a bit quicker (but still not instantaneously).