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2016 Marin County Tunnels |
The nearby Waldo Tunnels (27 0040L/R) are 1000 ft long and were built in 1937 and 1954. Since they carry busy US 101, they consist of two parallel 4 lane tunnels to and from the Golden Gate Bridge (shown above).
Marin County is big on bicycles and so there are several bicycle routes for commuters. I rode on the Cal Park Hill Pathway which shares a 1000 ft long tunnel with the Sonoma-Marin Area Rail Transit (SMART) Line. It includes a gate that closes the bike path at midnight (shown above). There are several similar 19th century railroad tunnels that are being renovated for new passenger rail lines and bike paths.
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Marin County, California Bridges: Marin County Tunnels by Mark Yashinsky is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
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