I, John Forester, offer the following, not as an official interpretation of CVC 21202, but as an example of how it is administered, and may well result in an appellate opinion.
I was cited for violating CVC 21202(A) by SDPD and then was found guilty at the trial.
My story here:
http://www.bikesd.org/2011/06/anothe...02-a-citation/
Scott Dion