I was riding in rush hour traffic in Sports Arena Blvd in San Diego, which is one of those congestion clogged, rude driver areas that a lot of beginner cyclists find a little intimidating (no bike lanes, confusing intersections, etc.). As I was going through an intersection, I looked over at the opposite direction, which had two or three lanes, and two turn lanes. I see an older lady on a mobility scooter preparing to make a left turn - VEHICULARLY FROM ONE OF THE TURNING LANES!!!!