Key legal question
Whether the right-lane driver had to follow the left signal light as well, so that he could be convicted for disregarding a red light.
Extracted holding
No. Where two parallel lanes are each signaled by separate lights, each light governs only its own lane.
Extracted reasoning
The setup is designed to separate traffic streams by lane. For an uninformed driver on the right lane, nothing clearly indicates that the left signal also governs his lane.