Signs in low-clearance situations (in tunnels, under bridge decks, etc.)

[myosh_tino]

I think this is gorgeous. Beefed-up supports, boxy-shape, almost art deco. It's prudent, economical, and almost perfect. I think.

You can thank the 1989 Loma Prieta earthquake for those beefy columns and supports as that was the end result of retrofitting the double-deck portion of I-280 north of US 101.  After the collapse of the I-880 Cypress Structure in Oakland, all of the double-decked freeways in San Francisco were either torn down (US 101/Central Freeway and CA-480/Embarcadero Freeway), retrofitted (I-280) or replaced (I-80, Bay Bridge west approach).