Beware - This signal still seems to be having issues. I was headed south on California, decided to use the left turn to get to Thriftway. The arrow turned yellow/red just as the car in front of me approached the signal. We sat through 2 complete cycles of the intersection with NO turn given to our lane, I finally bailed out and went straight through the intersection.
Its kind of puzzling that they can't get these signals to operate properly.
This has been reported to the SDOT.