Derail warning sign guarding an MoW spur, just north of San Francisquito Creek, Menlo Park, California.

Shot with the Nikon D70s and the 18-70mm f/3.5-4.5 zoom at 70mm, ISO 400, f/4.5, shutter 1/500 sec. Exposure, contrast, saturation, levels, highlights, and color adjustments in Aperture.