Skip to main content

California State Route 242

After driving the Warren Freeway on California State Route 13 east via CA 24 and Interstate 680 to drive California State Route 242.


CA 242 is a 3 mile freeway in Contra Costa County which runs northward from I-680 in Pleasant Hill to CA 4 in Concord .  CA 242 is a former segment of what was once a much larger CA 24 which was routed through the area on Legislative Route Number 75 in 1935 when it was extended to Berkeley from Sacramento.

The route of CA 24 from originally used the following alignment prior to the present CA 242 freeway being completed:

-  CA 24 was multiplexed with CA 21 north from Walnut Creek to Pleasant Hill.  CA 24/CA 21 entered Pleasant Hill on Contra Consta Boulevard where CA 24 split on Monument Road towards Concord.
-  CA 24 entered Concord on Monument Road which becomes Galindo Street entering downtown.
-  CA 24 exited downtown via Willow Pass Road which continued to CA 4.

The original alignment of CA 24 on the current CA 242 corridor can be seen on the 1938 State Highway Map.

1938 State Highway Map

By 1946 a new proposed alignment of CA 24 bypassing downtown Concord along what essentially is the modern CA 242 corridor is shown on the State Highway Map.

1946 State Highway Map

CA 24 was realigned by 1948 on a partially constructed Concord Bypass.  CA 24 was routed out of downtown Concord via Concord Avenue to the new limited access grade which is now the northern extent of CA 242.

1948 State Highway Map

In 1959 a new proposed cut-off route for CA 24 which would take a wide bypass of Concord to Antioch was assigned as LRN 256 according to CAhighways.org.

CAhighways.org on LRN 256

LRN 256 can be seen on the 1960 State Highway Map.

1960 State Highway Map

During the 1964 State Highway renumbering the planned path of LRN 256 was assigned to LRN 24.  CA 24 from Pleasant Hill to Concord stayed signed as CA 24 but was assigned LRN 242.

1963 State Highway Map

1964 State Highway Map

By 1965 the Concord bypass was completed and what is essentially modern CA 242 took form.

1965 State Highway Map

Interestingly CA 24 signage on the Concord bypass isn't changed on State Highway maps until 1988.  CA 24 appears to have been cut back to Walnut Creek at I-680 by 1988. 

1986 State Highway Map 

1988 State Highway Map

According to CAhighways.org the entire route of CA 242 appears to have been fully converted to freeway standards by 1992.  The planned route of CA 24 via what was LRN 256 appears to have never been officially cancelled.

CAhighways.org on CA 24

My approach to CA 242 was via CA 24 east and I-680 north.  The photo below is the eastern terminus of CA 24 at I-680 in Walnut Creek.  As described above it was wasn't until the late 1980s when the I-680/CA 24 multiplex was elminated.


I-680 north meets CA 242 at Exit 50 at a split junction.  I-680 essentially follows the former path of CA 21 whereas CA 242 obviously is the former path of CA 24.




As CA 242 north begins it almost immediately enters Concord.


CA 242 north has exits for; Clayton Road, Concord Avenue, Grant Street and Olivera Road before the terminus at CA 4.  The north terminus of CA 242 includes ramps to both CA 4 west and CA east.








Comments

Popular posts from this blog

Long closed California State Route 39 at Islip Saddle

Back in 2016 I visited the long closed segment of California State Route 39 in the Islip Saddle of the San Gabriel Mountains of Los Angeles County.


Islip Saddle is a mountain pass in the San Gabriel Mountains located at 6,680 feet above sea level.  Islip Saddle serves as the junction of CA 2/Angeles Crest Highway at the north terminus of CA 39/San Gabriel Canyon Road.  While the junction of CA 2/CA 39 unto itself is noteworthy due to the striking views from Islip Saddle southward through San Gabriel Canyon it has been become far more known for the long standing closure on the latter route since 1978.

CA 39 was one of the original 1934 State Highways and was made up of Legislative Route Number 171 south of what was US Route 101 in Buena Park and LRN 62 north of it.  In the case of LRN 62 it was created during the 1919 Third State Highway Bond Act.  The original legislative definition of LRN 62 had it running north from Azuza to Pine Flats in the San Gabriel Mountains to LRN 61 (which b…

Old US Route 60/70 through Hell (Chuckwall Valley Road and Ragsdale Road)

Back in 2016 I explored some of the derelict roadways of the Sonoran Desert of Riverside County which were part of US Route 60/70; Chuckwalla Valley Road and Ragsdale Road.


US 60 and US 70 were not part of the original run of US Routes in California.  According to USends.com US 60 was extended into California by 1932.  US 60 doesn't appear on the California State Highway Map until the 1934 edition.

USends.com on US 60 endpoints

1934 State Highway Map

Conversely US 70 was extended into California by 1934, it first appears on the 1936 State Highway Map.

USends.com on US 70 endpoints

1936 State Highway Map

When US 60 and US 70 were extended into California they both utilized what was Legislative Route Number 64 from the Arizona State Line west to Coachella Valley.  LRN 64 was part of the 1919 Third State Highway Bond Act routes.  The original definition of LRN 64 routed between Mecca in Blythe and wasn't extended to the Arizona State Line until 1931 according to CAhighways.org.

CAh…

Interstate 375 in Detroit; a doomed freeway?

Recently while visiting the City of Detroit I drove the entirety of Interstate 375.


I-375 is a short 1.147 mile spur of I-75 in downtown Detroit which connects to the unsigned I-375 Business Spur on Jefferson Avenue.  I-375 is the southernmost segment of the Walter P. Chrysler Freeway which carried largely by I-75 in the City of Detroit.  Construction of I-375 began in 1959 and the freeway was open to traffic by late 1964 according to michiganhighways.org.

michiganhighways.org on I-375

The average traffic count on I-375 ranges between approximately 14,000 vehicles at Jefferson Avenue and approximately 54,000 vehicles at I-75.  The low traffic counts on I-375 has recently led to proposals to put the freeway on a "road diet."  In 2013 the Michigan Department of Transportation announced that it may at some point in the future remove I-375.  In 2014 MDOT announced six proposals for I-375 which were eventually reduced to only two boulevard alternatives by 2017.  In late 2018 a six…