There's a large rainbow mural on Sycamore immediately west of the underpass that goes under 980 in the Hoover-Foster neighborhood. It says "Oakland" in big letters and in the upper left it says "West" making it read "West Oakland."  It also reads "West Oakland" in the lower left.

If you have more info about it, please add.

One of the artists seems to be Slang 500.

Cool big picture here and here.

ants mural portion. photo CC BY-NC-ND 2.0 by 
William Newton