a friend of mine in california turned right on a red light where there was a "no right turn on red" sign. a camera took a picture of her license plate. about a couple of weeks later she received a notice in the mail stating that she breached section vc21453 (a).
section vc21453 (a) states the following:
21453. (a) A driver facing a steady circular red signal alone shall
stop at a marked limit line, but if none, before entering the
crosswalk on the near side of the intersection or, if none, then
before entering the intersection, and shall remain stopped until an
indication to proceed is shown, except as provided in subdivision
(b).
section vc21453 (b) states the following:
(b) Except when a sign is in place prohibiting a turn, a driver,
after stopping as required by subdivision (a), facing a steady
circular red signal, may turn right, or turn left from a one-way
street onto a one-way street. A driver making that turn shall yield
the right-of-way to pedestrians lawfully within an adjacent crosswalk
and to any vehicle that has approached or is approaching so closely
as to constitute an immediate hazard to the driver, and shall
continue to yield the right-of-way to that vehicle until the driver
can proceed with reasonable safety.
did she breached section vc21453 (a) or did she breached section vc21453 (b)?
if she breached section vc21453 (b), is she also guilty of breaching section vc21453 (a)? if she is not guilty of breaching section vc21453 (a), is there a section in the california vehicle code that states that she cannot be found guilty of breaching section vc21453 (a) because she cannot be charged or cited for the wrong violation? thank you!

