Even More Left than Berkeley

Left-hand exit from California 13 to California 24 in Oakland

It's hard to be farther left than Berkeley, but the exit from northbound California 13 to westbound California 24 in Oakland manages to do it. It's hard to see from this photo, but button reflectors were still in use on these signs when this photo was taken in May 2009.

And, yes, that's a big hill in the background. If you look closely, you can see the road that goes up the hill as a diagonal line going up and to the right.