Riding a bicycle on a sidewalk is rarely a better choice than riding in the street, but it is better on the Hawthorne bridge in Portland, Oregon, which has a narrow roadway with a treacherous steel-grid deck.
I first rode across this bridge in 1987. As of my more recent exploration of the bridge in September, 2008, the sidewalks have been widened significantly, and the routes to and from them greatly improved.
My friend Kat Iverson rode behind me with her helmet camera and shot the 5-minute video which you may view here.
More recently yet, I have read a blog posting by Mark Stosberg about the bridge. He and I agree that riding on the sidewalk is a necessary evil in this situation. He even links to my Web site as a reference. He states correctly that there are “no roads or driveways to cross on the bridge while traveling westbound.”
But just about there, my agreement with him begins to fade.