It's Not Just an Exit

RAMP sign instead of an EXIT sign at the gore point of a California 13 exit in Oakland

For some reason, instead of EXIT signs, RAMP signs are used at the gore points of several of the ramps connecting California 13 and California 24 in Oakland. This one is on northbound 13, at the ramp for westbound 24.

There's also a flashing yellow blinker on this sign, possibly to warn drivers that the exit is on the left, rather than the right.