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California State Route 255

In this article we examine the history of California State Route 255 and the Humboldt Bay Bridge.


California State Route 255 ("CA 255") is a 9 mile loop of US Route 101 within Humboldt County.  CA 255 originates at US 101 in the City of Eureka and utilizes the three tier Humboldt Bay Bridge northwest to the Samoa Peninsula.  Upon reaching the Samoa Peninsula CA 255 turns northeast back to US 101 in Arcata.



Part 1; the history of California State Route 255

The history of CA 255 is somewhat modern by California State Highway standards.  CA 255 was adopted as part of Legislative Chapter 1898 of 1963 according to CAhighways.org.  Interestingly CA 255 was also assigned Legislative Route 294 but it was effectively nullified by the 1964 State Highway Renumbering.  The original definition of CA 255 was; "Eureka across Humboldt Bay to the Samoa Peninsula."  CA 255 first appears as a planned highway on the 1964 Division of Highway State Map.



Prior to CA 255 automotive access …

California State Rotue 29

This past November I took California State Route 29 from the outskirts of Napa to Interstate 80 as part of my route home from Santa Rosa.


California State Route 29 ("CA 29") is a 106 mile north/south highway which begins at CA 20 near Upper Lake of Lake County.  CA 29 is a mostly rural highway which terminates at Interstate 80 in the City of Vallejo of Solano County.




Part 1; the history of California State Route 29

CA 29 was one of the original California Sign State Routes announced in the August 1934 California Highway & Public Works ("CHPW").   CA 29's original definition had it aligned between Vallejo and Upper Lake.



The first map I can find that shows CA 29 in detail is the 1935 Goshua Highway Map of California.  CA 29 is shown aligned through Cobb on what would be present day CA 175.  Within Napa CA 29 was aligned through downtown and followed present day CA 221 towards Vallejo.


CA 29 as originally defined was aligned over the following Legislative Route…