Can you challenge a violation of carpooling in CA if u turned it in to avoid being in an accident?

It sucks because I had to swerve on a ramp carpool. The cop saw me at the bottom, but after the ramp, but cars in the normal channels have been going too slow to merge safely for about a mile. And the cops, ur bs meter is bs, so I am in this problem to begin with. To be clear: he saw me leave the ramp

Yes, you can as long as you can prove