[rconti]

There are multiple bike bridges/undercrossings across 237. 101 has bike bridges just south of 237, another in Palo Alto (which I use every day), and another up between Willow and Marsh roads in Menlo Park, then another in Belmont. There's also a 101 undercrossing that is seasonal, just south of the bike bridge in Palo Alto.

Those are just the areas I know.

It is truly an amazing place to ride. Generally flat, very nice weather. Even in the rain I don't mind the ride, but I have to wear waterproof shoes, and I bought waterproof pants and a jacket.