I made a right hand turn on a red arrow (right in front of a motorcycle cop). I now know this is illegal. The officer that stopped me told me there was a sign and he was right (I went back to see) The thing was the sign was at the beginning of the off ramp of the freeway and was hard to see. Apparently my traffic court judge had a lot of people come through his courtroom complaining about the very same thing. He told me he was actually in contact with the city about putting the correct signs up at this particular exit. He didn't totally let me off but he did reduce my fine ($300 down to $150) and let me attend traffic school. Then next time I went by the place where I got my ticket there were signs all over the place noting the no right turn on red arrow.