The PPPKN-10 (Probable Peugeot PKN-10, based on 'net research, catalogs from the great
bikeboompeugeot.com, and the Francophiles at the Classic & Vintage forum on
bikeforums.net,) on the San Francisco Bay Bridge. When CalTrans rebuilt the eastern span after the 1989 earthquake, they put in a bike lane. Which only goes about 2/3rds of the way across the Bay, from Oakland to Treasure Island, so I don't really know why thy bothered.
But they did, and I rode on it, and here's the bike on the bridge:
It's a neat ride. (And riding on the bridge is interesting, too.) Pretty steady ~3-4% grade westbound, but that just means 2 and a quarter miles of tailwind downhill once you turn around. Hit the drops and hammer... 25+ is easy. Just keep your eyes out for the expansion joints. They've got these little cover things over them. Not much, but tall enough that you want to scoot back and lighten the front wheel before you hit 'em.
About 15 miles out and back from my apartment in Northgate Oakland. (25th & Telegraph, for those who both know and care. Which is pretty much me.)
--Shannon