The Dumbarton Bridge has a separated bike/pedestrian lane, but you are still riding next to traffic going 80-90 mph, and it is quite windy, so it can be a bit of an adventure.

Here's the lane (no worries about me breaking the speed limit):


Took a brief photo break at the top.


Here's an old defunct rail bridge that runs parallel to this bridge.


In the distance you can see the San Mateo bridge which is my direct route to work. This may give you a sense of how far out of my way I had to go.


This is the flat section of the bridge, bikes go off the dedicated lane onto a separate road. The pavement here is really rough, but it was pretty comfortable on the Birdy (much more so than on my hybrid or road bike).


I took a self-portrait here. Interesting proportions!