Rick Paulos wrote:
from the Cedar Rapids (Iowa) Gazette letters to the editor:

There might be a big problem for bicycle riders in Cedar Rapids with
the red light/radar cameras now being installed. As a bicycle wheel
rotates on a bike that is moving forward at 20 mph:

A. The part of the wheel touching the ground is moving forward at 0
mph.
B. The center of the wheel and the bike itself with rider is moving
foward at 20 mph.
C. But, the spokes at the top of the weheel are moving forward at 40
mph.

This is just simple mathematics for a rotating wheel.

If the red light/radar detects the spokes at the top of the wheel
instead of the bike itself, I will get at ticket for travelign 40 mph
wihile I'm only traveling 20 mph.

I see a potential problem for bicycle riders in Cedar Rapids.

author name snipped

How are the CR police going to identify the cyclist to mail him/her a
ticket? Besides, in all likelihood, the radar will pick up the strongest
reflection, which will be the rider's body (except velomobiles).

Not losing sleep over this one yet.

--
Tom Sherman in CR