Skip to main content

California State Route 84 west from Interstate 880 over the Dumbarton Bridge

On a recent Bay Area trip I took California State 84 west from Interstate 880 over San Francisco Bay via the Dumbarton Bridge.


The Dumbarton Bridge is a 1.63 mile structure crossing San Francisco Bay near Dumbarton Point.  The Dumbarton Bridge is the southernmost bridge in San Francisco Bay and the shortest.  The current Dumbarton Bridge was completed by 1982 in a four-lane configuration and was expanded to six-lanes by 1989.

The original Dumbarton Bridge opened in 1927 and was built private money.  The 1927 Dumbarton Bridge was similar to the 1929 San Mateo-Hayward Bridge in that it featured a causeway structure and a center vertical lift span.  Like the 1929 San Mateo-Hayward Bridge the 1927 Dumbarton Bridge was purchased by the California Division of Highways in 1951.  The 1927 Dumbarton Bridge became part of Legislative Route 107 which already existed on both ends of the structure since 1933.  Said change to LRN 107 can be observed by comparing the 1951 State Highway Map to the 1952 edition.

1951 State Highway Map

1952 State Highway Map

LRN 107 and the 1927 Dumbarton Bridge would become part of CA 84 during the California Highway Renumbering of 1964.

1963 State Highway Map

1964 State Highway Map

The 1927 Dumbarton Bridge was mostly demolished in 1984 but a small portion of the eastern approach near in Newark exists as a fishing pier.

My approach to CA 84 west and the Dumbarton Bridge were from I-880 south.





CA 84 west enters the City Limits of Newark (Alameda County) west of I-880.  CA 84 west to the Dumbarton Bridge toll is a freeway grade signed at 65 MPH.


Heading west on CA 84 it is apparent some of the overhead signage has seen better days.


Tolls for the Dumbarton Bridge are collected on westbound CA 84 and are $6 dollars cash for a two axle vehicle.  The last Exit before the Dumbarton Bridge toll is at Thorton Avenue/Paseo Padre Parkway.








West of the Dumbarton Bridge toll the route of CA 84 largely falls below freeway standards and has a poor surface quality.  The speed limit over the Dumbarton Bridge is 55 MPH.









As the Dumbarton Bridge rises over San Francisco Bay it enters San Mateo County and Menlo Park.


The Dumbarton Bridge ends in Menlo Park.  CA 84 continues west over the San Cruz Mountains to CA 1 on the Pacific Ocean.  After crossing the Dumbarton Bridge I turned south on CA 109 on University Avenue.










Comments

Popular posts from this blog

Signed County Route J37; the last Signed Tulare County Route and the Lone Pine to Porterville High Sierra Road

Recently I drove the entirety of Signed County Route J37 located in rural Tulare County.  Signed County Route J37 is notable in that it is the last Signed County Route which actually has field signage left in Tulare County and was intended to be part of a Trans-Sierra Highway known as the Lone Pine to Porterville High Sierra Road.


While researching California State Route 190 and more specifically the gap in the highway over the Sierra Nevada Range it became quickly apparent that there was far more to J37/Balch Park Road than initially thought.  The previous blog on California State Route 190 can be found here:

California State Route 190; the Trans-Sierra Highway that could have been 

On the above blog I attached an article from 1926 written by the Los Angeles Times detailing the route of the Lone Pine to Porterville High Sierra Road which was slated to begin construction in 1927.  The route of the Lone Pine to Porterville High Sierra Road would have followed Carroll Creek southward out…

Paper Highways of the Mojave Desert and San Gabriel Mountains; CA 48 (ii), CA 122, CA 196, and CA 249

In this edition Paper Highways the planned California State Highways of the Mojave Desert and San Gabriel Mountains are explored.  This issue will cover the planned routes of; the second CA 48, CA 122, CA 196, and CA 249.



Part 1; the wholesale Legislative Route adoptions of 1959

CA 48, CA 122, CA 196, and CA 249 prior to the 1964 State Highway Renumbering all were adopted as planned Legislative Routes ("LRN") in 1959.  Part of the planned LRN 267 west of Lancaster was already part of the existing CA 138 on LRN 59.  CA 48 east of Lancaster was planned as LRN 267 which was to have an eastern terminus at LRN 266.  LRN 266 was planned to originate from CA 2/LRN 61 near La Canada Flintridge and cross north/northeast over the San Gabriel Mountains into the Mojave Desert near Palmdale.  LRN 266 was planned to continue northeast from Palmdale to former US 466/LRN 48 near Hawes.  LRN 266 became CA 249 and CA 122 during the 1964 State Highway Renumbering.  LRN 269 was planned to be rou…

Old California State Route 65 on; Famoso-Porterville Highway, Sign County Routes J35/J22/J29

Earlier in March I traveled down to Famoso of Kern County to take the original alignment of California State Route 65 north to Lindsay in Tulare County.


This blog is a spin off of the below entry on the Southern Segment of current California State Route 65.

California State Route 65; South Segment

Part 1; The Stockton-Los Angeles Road, the East Side Line, and early California State Route 65 on Legislative Route 129

The corridor of CA 65 is closely aligned to the Sierra Nevada Foothills which first became a popular route of travel as part of the Stockton-Los Angeles Road.  The Stockton-Los Angeles Road came into use after the 1853 Kern River Gold Rush began.  The Stockton-Los Angeles Road was a replacement of the earlier El Camino Viejo.  Unlike El Camino Viejo the Stockton-Los Angeles Road avoided the dense Tule Marshes in San Joaquin Valley.  The Stockton-Los Angles Road stayed close to the Sierra Foothills near the new claims on the Kern River watershed.  The earlier El Camino Vi…