Switchstand, and graffiti on the abutments of the Oakdale Avenue bridge, just north of Caltrain tunnel #3, San Francisco.

Shot with the Nikon D70s and the 18-70mm f/3.5-4.5 zoom at 70mm, ISO 400, f/8, shutter 1/800 sec. White balance, saturation, levels, and highlights adjustments in Aperture.