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Chronology of California Highways

 
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Phase II: Early Growth (1915-1932)


1915

The following routes were explicitly included in the 1915 statutes (PDF, 99.2GB)

Eventual LRN First Signage Other Signage Present Route (R) and Signage (S) Action Segment
Lake Tahoe Wagon Road (Adoption)
"An act declaring the wagon road extending from the western end of the Lake Tahoe state wagon road to the eastern limits of the city of Placerville to be a state highway."
(April 10, 1915, Chapter 32)
LRN 11 US 50   US 50 Extend Adopt the portion from Placerville to Lake Tahoe:

"the wagon road extending from the W end of the Lake Tahoe State Wagon Road to the E limits of the city of Placerville".

McKinneys-Donner Lake State Highway
"An act declaring the wagon road from McKinney's to the west end of Donner Lake a state highway."
(May 18, 1915, Chapter 203)
LRN 37 US 40   I-80 Extend McKinney's to Donner Lake

"...the wagon road extending along the W side of Lake Tahoe, from McKinney's in El Dorado Cty to Tahoe City, thence along the Truckee River to Truckee, and thence in a W-ly direction to Donner Lake in Nevada Cty, connecting with the present state highway from Emigrant Gap"

LRN 38 US 40   I-80 Define
Yolo and Lake Highway
"An act to establish the Yolo and Lake highway; to define its course; to provide for its location and survey; and to make an appropriation therefor."
(May 18, 1915, Chapter 283)
LRN 50     CA 20 Survey Only "commencing at the town of Rumsey, in the county of Yolo and following generally the meanderings of Cache Ck...to the town of Lower Lake, in the county of Lake."
This routing was allocated and defined in the 1919 Third Bond Issue.

Chapter repealed by 1935 Chapter 29, Article XX

Great Sierra Wagon Road (Tioga Road)
"An act to appropriate money to purchase a portion of the Great Sierra Wagon Road and to provide for the acceptance and maintenance of said road as a state road."
(May 18, 1915, Chapter 306)

Big Oak Flat State Highway
"An act to take title to and thereafter maintain as a state highway, the toll road in Tuolumne and Mariposa counties, known as the Big Oak Flat and Yosemite road, also a section of Tuolumne county road to connect said toll road with the Sonora lateral of the state highway."
(May 19, 1915, Chapter 396)

LRN 18
LRN 40
CA 120   CA 120/RS
CA 108/S
Extend Yosemite National Park to US 395:

Great Sierra Wagon Road: "that portion of the Great Sierra Wagon Road, better known as the Tioga Road, lying without the boundary of Yosemite National Park, providing that the portion within the park is taken over by the federal government."

Big Oak Flat State Hwy: "that certain toll road in Tuolumne and Mariposa counties known as the Big Oak Flat and Yosemite Toll Road beginning at a point near the former location of Jack Bell Sawmill in Tuolumne Cty and extending thence in an E-ly direction through a portion of Mariposa Cty at Hamilton Station, thence again into Tuolumne Cty, past the Hearden Ranch, Crocker Station, Crane Flat, and Gin Flat to the boundary line of the original Yosemite Grant near Cascade Creek"

Auburn-Emigrant Gap State Highway
"An act declaring the county road extending from Auburn...to a point near Emigrant Gap, a state highway..."
(June 9, 1915, Chapter 678)
LRN 37 US 40   I-80 Extend Auburn to Emigrant Gap

"...the county road extending from Auburn in an E-ly direction and connecting with the Emigrant Gap state road at a point near Emigrant Gap."

Tahoe City-Crystal Bay State Highway
"An act making an appropriation for the location, survey and construction of a state highway from Tahoe city...along the northern boundary of Lake Tahoe to the western boundary of the State of Nevada at Crystal Bay..."
(June 9, 1915, Chapter 680)
LRN 39 CA 28   CA 28 Define Tahoe City to the Nevada state line

"a state highway from Tahoe City, Placer County, along the N boundary of Lake Tahoe to the W boundary of Nevada at Crystal Bay"

Pasadena State Highway
"An act to locate and survey a state highway designated as the Pasadena State Highway"
(June 9, 1915, Chapter 704)
LRN 61 CA 2   CA 2 Survey Only "to connect the La Cañada valley with the Antelope Valley...starting 2 mi NE of La Cañada thence following N and NW-ly the Arroyo Seco to a point E of Hoyt Ranch; thence NE-ly following Tujunga Cyn and Mill Creek to Tie Cyn; thence NW-ly by way of Kennedy Springs to Vincent."
This routing was allocated and defined in the 1919 Third Bond Issue.

Chapter repealed by 1935 Chapter 29, Article XX

Bakersfield to Ojai, Kern-Ventura State Highway
"An act to provide for the survey, location, and estimate of cost of a state highway from a point on the present located state highway in Kern County S of Bakersfield to the town of Nordhoff, Ventura County"
(June 12, 1915. Chapter 748)
LRN 57
LRN 138
    Perhaps CA 33, CA 166, CA 119 Survey Only "from a point on the present located state highway in Kern County S of Bakersfield to the town of Nordhoff, Ventura County".
This routing was never established, although portions may have been incorporated into Route 33, Route 166, or Route 119. Nordhoff is now the city of Ojai.

Chapter repealed by 1935 Chapter 29, Article XX

Pescadero-Redwood Park Road
"An act to provide for locating, surveying, and maintaining a highway from Pescadero in the County of San Mateo to the California Redwood Park in Santa Cruz County."
(June 12, 1915, Chapter 764)
Unclear     Roughly Pescadero Creek Road Survey Only "from Pescadero in the County of San Mateo to the California Redwood Park in Santa Cruz County."
This road appears to have followed the present Butano Fire Trail and China Grade Road, though the latter was to be bypassed by a road along Waddell Creek.

Chapter repealed by 1935 Chapter 29, Article XX

Middle Lake Highway
"An act providing for an appropriation for the location, survey and construction of a highway to lead from Surprise valley, in Modoc county, to the Nevada state line."
(June 12, 1915, Chapter 765)
LRN 28 US 299   CA 299 Survey Only "from Surprise valley, in Modoc county, to the Nevada state line."
This was added in 1921 as an extension of LRN 28

Chapter repealed by 1935 Chapter 29, Article XX

1915/1916 - Second Bond Act

In 1915, the state authorized an addition $15,000,000 bond act, which was approved by the voters in 1916. This second bond act authorized 702 additional miles of highway, and provided explicit definitions for the routes in the first bond act.

1915 also saw the passage of the "Convict Labor Law", which permitted the Department of Engineering to use prison labor for the construction of state highways.

It was also around this time that routes began to be defined by route numbers (referred to in these pages as LRNs, so as to distinguish them from the signed route numbers posted by the Auto Club starting in 1926, which use the term Route). These numbers appear to have been maintained by the California Highway Commission or Department of Engineering — they were not listed (to my knowledge) in the legislation until 1935.

The routes in this act were defined in the 1915 statutes, Chapter 404.

LRN First Signage Other Signage Present Route (R) and Signage (S) Action Segment
LRN 10 Extend from Hanford to San Lucas, 98.25 mi
"an extension connecting the San Joaquin valley trunk line in Tulare County with the coast trunk line in Monterey County by the continuation of the lateral between the cities of Visalia and Hanford through Coalinga by the most direct and practical route..."
CA 198   CA 198 Extend US 101 near San Lucas to Coalinga
CA 33   CA 33 Extend Coalinga to Oilfields
CA 198   CA 198 Extend Oilfields to Hanford
LRN 18 Extend from Mariposa to El Portal, 32.60 mi
"an extension of the Mariposa county state highway lateral to or near the railway station El Portal in Mariposa County;"
CA 140   CA 140 Extend Mariposa to El Portal
LRN 20 Extend from [LRN 1] in Arcata to Douglas City, 102.0 mi
"...an extension connecting the interior and trunk coast lines in Northern California through Trinity and Humboldt counties by the most direct and practical route;"
US 299   US 299 Extend [LRN 1] in Arcata to Douglas City
LRN 23 Extend: Saugus to Los Angles "an extension connecting Antelope Valley in the County of Los Angeles with the city of Los Angeles by the most direct and practical route..."
CA 7 US 6 CA 14 Extend Saugus to Los Angeles
LRN 26-LRN 27 From San Bernardino to Yuma via El Centro, 195.86 mi
"an extension of the San Bernardino county state highway lateral to the Arizona State Line near the town of Yuma, Arizona, via the cities of Brawley and El Centro in Imperial County by the most direct and practical route..."
CA 18   CA 18 Define LRN 26: [LRN 9] in San Bernardino to Colton. This was a spur into San Bernardino from the mainline; it was deleted in 1959.
US 70 US 99
US 60
I-10 Define LRN 26: Colton to Route 86 in Indio
US 99   CA 86 Define LRN 26: Indio to Route 111/Route 86 junction E of Heber
US 80   I-8, CA 115 Define LRN 27: El Centro to the Arizona state line (Yuma)
LRN 31 From San Bernardino to Barstow, 76.33 mi
"an extension of the San Bernardino county state highway lateral to Barstow in San Bernardino County by the most direct and practical route..."
US 91 US 395
I-15E
CA 194
I-215 Define Route 30 (San Bernardino) to I-15 near Devore
US 91 US 395
US 66
I-15 Define I-215 (former US 395) near Devore to 7 mi SW of Victorville
US 91 US 66 I-15 Define 7 mi SW of Victorville to Barstow
LRN 32 From [LRN 4] near Califa to Gilroy, 83.45 mi
"an extension connecting the San Joaquin valley trunk line at a point between the city of Merced in Merced County and the city of Madera in Madera County with the coast trunk line at or near the city of Gilroy in Santa Clara County, through Pacheco Pass, by the most direct and practical route;"
CA 152   CA 152 Define US 101 near Gilroy to Route 99 near Califa
LRN 33 From [LRN 4] near Bakersfield to Paso Robles, 91.22 mi
"an extension connecting the San Joaquin valley trunk line at or near Bakersfield with the coast trunk line in San Luis Obispo county, through Cholame pass, by the most direct and practical route;"
US 466   CA 46 Define US 101 near Paso Robles and Shandon
US 466   CA 46
CA 41
Define Shandon and Cholame
US 466   CA 46 Define Cholame to Route 99 near Bakersfield

1916

In 1916, the voters passed the 1915 bond act.

More significantly, in 1916, Congress passed the Bankhead Act, which created the Federal Aid Program. Under this program, federal funds were provided for roads that would improve rural mail delivery ("post roads"). This program required the state to come up with one half of the costs of the road. California received $151,063.92 in Federal Aid funds for the fiscal year ending June 30, 1917.


1917

The following routes were defined in the 1917 statutes (PDF, 110 MB):

Eventual LRN First Signage Other Signage Present Route (R) and Signage (S) Action Segment
San Bernardino to East End of Big Bear Lake
"An act declaring and establishing a state highway from the city of San Bernardino, by way of Arrowhead avenue, Waterman canyon, the 'Crest drive' and Mill creek to the city of Redlands."
(May 29, 1917, Chapter 697)
LRN 43
(38+13 mi)
US 91 CA 18 CA 18 Define Basically, this was the portion from the end of county roadway in San Bernardino (Route 30) to Arrowbear. It was routed along the northern side of Big Bear Lake.

"...Beginning at a point in Waterman Cyn at the termination of the pavement of the San Bernardino County highway system, thence following the meanderings of the road known as the "Crest Drive" into Bear Valley, ending at a point directly opposite the most easterly point of Bear Lake."

Boulder Creek Road
"An act providing for the taking over by the state of California of a certain road in Boulder Creek township...and for the maintenance and improvement of the same as a state highway..."
(May 29, 1917, Chapter 703)
LRN 44
(8 mi)
CA 9   CA 236 Define Route 9 near Boulder Creek to Route 9 near Governor's Camp

"...that certain road situated in Boulder Creek township, county of Santa Cruz... Beginning at the intersection of Main and Lorenzo Streets in the town of Boulder Creek, thence running in a NW-ly direction over the present traveled road to the Sequoia schoolhouse, thence running over the road known as the Boulder Creek and state park road to the E-ly boundary of the California Redwood Park..."

Mono Lake Basin State Road
"An act extending the Mono Lake basin state road easterly to a junction with the county road from Mono Lake postoffice to Mono Mills."
(May 29, 1917, Chapter 704)
LRN 40 US 395   US 395 Extend In the vicinity of Mono Lake

"...to extend the Mono Lake Basin state road E-ly to a junction with the county road from Mono Lake Post Office to Mono Mills"

Susanville to Nevada
"An act making an appropriation for the survey, location and construction of a highway between Susanville...and a point on the line between California and Nevada, approximately two miles east of Constantia..."
(June 1, 1917, Chapter 769)
N/A US 395   US 395
CA 36
Survey Only "...for the survey, location, and construction of a highway by the most direct and feasible route to follow as nearly as practicable the line of the road as it now exists running in an E-ly direction from Susanville in Lassen county to a point on the line between California and Nevada approximately 2 mi E of Constantia in said county..."
This road appears to have been covered by previously defined routes.

Chapter repealed by 1935 Chapter 29, Article XX

The 1917 statutes also contained a chapter (Chapter 746) that extended additional funding to pay the cost of making surveys and preparing plans and estimates for highways as follows: "An extension of the Trinity-Humboldt state road, from its W-ly end, in a W-ly direction to the town of Bridgeville in Humboldt County; a highway beginning at or near Oxnard in Ventura County, California and extending to a point near San Juan in Orange county, California; a highway from Jackson's Ranch near Pescadero in San Mateo county, California to Governor's Camp in the California Redwoods Park, Santa Cruz county, California; a highway beginning at Carmel in Montery County, California and running thence in a S-ly direction to San Simeon in San Luis Obispo county, California; and a lateral highway from a point most feasible theron to a point at or near Jolon in said Monterey County; a birdge to span San Francisco Bay at or near Dumbarton Point; and a highway from the western boundary line of Kern County, California to the state highway near the city of Santa Maria, Santa Barbara County, California." These roads were all later created or were part of the system at the time. A number of these were later funded by the 1919 bond act.


1918

By 1918, several important highway projects had been completed, including the Ridge Route, the Yolo Causeway, the Kings River Canyon, Alturas-Cedarville, Emigrant Gap, and the Imperial County Plank Road.


1919

The following were acts in the 1919 statutes (PDF, 90.4 MB) extending previous routes:

Eventual LRN First Signage Other Signage Present Route (R) and Signage (S) Action Segment
Truckee to Nevada Line
"An act declaring and establishing a state highway from the town of Truckee running in a northeasterly direction along the present traveled road to the Nevada state line near Verdi."
(April 15, 1919, Chapter 66)
LRN 38 US 40   I-80 Extend Truckee to Nevada State Line

“A certain highway in Nevada and Sierra counties, running as follows: From a point in the town of Truckee where the present state highway branches at the subway under the Southern Pacific tracks going toward Lake Tahoe, continuing through the town of Truckee, crossing Prosser Creek and over what is known as the "Dog Valley Grade" as far as the state line about 1 mi NW of Verdi, Nevada...”

Long Barn to Sonora
"An act declaring the public highway extending from Long Barn...to the eastern boundary of the city of Sonora to be a public state highway."
(May 27, 1919, Chapter 510)
LRN 13 CA 108   CA 108 Extend Sonora to Long Barn

"All that portion of the public highway commencing at the end of the Sonora and Mono state highway at Long Barn in Tuolumne county and leading therefrom to the eastern boundary of the city of Sonora and known as the Sonora and Mono Road is hereby declared to be a state highway..."

Biggs-Willows Road
"An act declaring and establishing a state highway between the present state highway in Butte county and the present state highway in Glenn county, over existing county roads passing through Butte city and Glenn postoffice to Willows."
(May 27, 1919, Chapter 542)
LRN 45 CA 162   CA 162 Define CA 162: I-5 near Willows to Route 45
CA 162: Route 45 to Route 99 near Biggs

"That certain highway beginning at a point on the present state highway in Butte county about 3 mi N-ly of the town of Biggs, thence extending W-ly and crossing Cherokee Canal and Butte Creek and extending through Butte City and across the Sacramento River, thence N-ly to Glenn Post Office, thence W-ly to the town of Willows in Glenn County ... is hereby constituted a state highway..."

CA 162   CA 162 Define

1919 - Third Bond Issue

In 1919, the state legislature amends the Motor Vehicle Act of 1913 by requiring that the county supervisors submit an annual report detailing the expenditures of road funds derived from the state Motor Vehicle Fund. This helped to ensure that these funds were expended in accordance with the original intent of the funds.

More significantly, in the special election of July 1, 1919, the voters approved a third highway bond issue for $40,000,000. This act authorized creation or extension of 1,853 mi of highways. This act extended the funds for the completion of the highways contemplated under the two preceding acts by the addition of $20,000,000 to the highway funds for this purpose, and an additional $20,000,000 for the construction of some additional routes.

LRN First Signage Other Signage Present Route (R) and Signage (S) Action Segment
LRN 1 Extend: Crescent City to Oregon Line, 40 mi
US 199   US 199 Extend Cresent City to the Oregon Border. Some of the milage might be with LRN 71.
LRN 10 Extend: Visalia to Sequoia National Park, 36 mi
CA 198   CA 198 Extend Route 99 (US 99) near Visalia to the Sequoia National Park
LRN 11 Extend: Placerville to Sportsman's Hall, 10 mi
US 50   US 50 Extend Placerville to Sportsmans Hall.
10 miles are under special appropriate roads, so this may relate to some of the earlier allocations for LRN 11
LRN 15 Extend: Ukiah to Emigrant Gap, 212mi
(Note this also includes funding for the LRN 37 and LRN 38 extensions)
CA 20   CA 20 Extend US 101 near Ukiah to Williams
CA 20   CA 20 Extend Colusa to I-80 (former US 50) near Tahoe City
LRN 21 Extend: Oroville to Quincy, 27 mi
Unknown   Unknown Extend Oroville to Quincy. This is the former LRN 30 portion. See 1909.
LRN 22 Extend: Pacheco Pass Road into Hollister, 8 mi
CA 152   CA 152 Extend Pacheco Pass Road into Hollister.
LRN 29 Extend: Susanville to Nevada State Line, 53 mi
CA 7   US 395 Extend Nevada state line to Johnstonville (Route 36 junction)
CA 36 CA 172 CA 172 Extend Route 36 at Mineral to Route 36 near Morgan Summit near Susanville
LRN 37 Extend: Emigrant Gap to Verdi
US 40   I-80 Extend Auburn to I-80 near Verdi via Emigrant Gap.
The segment between Auburn and Emigrant Gap was authorized, but not funded, in 1915.
LRN 38 Extend: Tahoe City to Truckee
US 40   I-80 Extend Tahoe City to Truckee
This may have been the "McKinneys-Donner Lake State Highway" authorized, but not funded in 1915, or it may have been part of the "Tahoe City-Crystal Bay State Highway", which appears to have been CA 28.
LRN 41 Funding: Kings River Canyon State Road, 20 mi
CA 180   CA 180 Funding Route 33 near Kings River Canyon to General Grant Grove.
A portion of this is the "Kings River Canyon State Road", authorized in 1905.
LRN 43
(14 mi)
Extend: Deep Creek to Metcalf Creek, Angeles National Forest, 14 mi
CA 18   CA 18 Extend Deep Creek easterly via Bear Valley Dam to the county road at Metcalf Creek in the Angeles National Forest (Arrowbear to the Eastern End of Big Bear Lake). This ran on the S side of Big Bear Lake.
LRN 46 Klamath River Bridge [LRN 3] to [LRN 1] near Klamath River, 177 mi
CA 96 CA 169 CA 169 Define US 101 near Klamatch to Weitchpec
CA 96   CA 96 Define Weitchpec (Route 169) to I-5
LRN 47 Orland to Chico, 20 mi
CA 32   CA 32 Define Orland to Chico
LRN 48 McDonalds to the mouth of the Navarro River, 47 mi
CA 28   CA 128 Define Route 1 to US 101 (McDonalds to the mouth of the Navarro River)
LRN 49
(31–32 mi)
Calistoga to Lower Lake, 32 mi
CA 29   CA 29 Define Route 121 near Calistoga to Middletown
CA 53   CA 29 Define Middletown to Route 53 in Lower Lake
CA 53   CA 53 Define Route 29 in Lower Lake to Route 20

LRN 50 Rumsey to Lower Lake, 32 mi
CA 16   CA 16 Define Route 20 to Rumsey
LRN 51 Santa Rosa to Shellville, 24 mi
CA 12   CA 12 Define US 101 (Santa Rosa) to Route 121 near Napa (Shellville)
LRN 52 Tiberion to Alto, 5 mi
Unknown   CA 131 Define US 101 near Mill Valley to Tiburon.
The 1924 definition was Tiburon to Alto.
LRN 53 Rio Vista to Fairfield, 24 mi
CA 12   CA 12 Define I-80 (US 40) near Fairfield to Rio Vista.
LRN 54 Near Michigan Bar to Drytown, 12 mi
CA 16   CA 16 Define The county line near Michigan Bar to Route 49 near Central House (Drytown)
LRN 55 San Francisco to Santa Cruz, 67 mi
CA 5   CA 35 Define Route 17 near Santa Cruz to Route 92 via Skyline Blvd.
CA 5   None Define Route 92/I-280 interchange to Skyline Blvd exit. (Superseded by LRN 237)
CA 5   CA 35 Define I-280/Skyline Blvd to Route 1 near San Francisco
LRN 56 Carmel to San Simeon, 97mi
CA 1   CA 1 Define San Simeon to Carmel
LRN 57 Santa Maria to Freemans via Bakersfield, 202 mi
US 399 CA 166 CA 33/S
CA 166/RS
Define 7 mi N of Ventucopa (Route 33/Route 166 junction) near Santa Maria to Maricopa
CA 33 CA 166 CA 166 Define Maricopa to Route 99 S of Bakersfield
CA 178   CA 178 Define Route 99 in Bakersfield to US 395
LRN 58 Mojave to Needles via Barstow, 255 mi
US 466   CA 58 Define Route 14 (US 6) near Mojave to Barstow
US 66   I-40 Define Barstow to the Arizona state line near Needles
LRN 59 Lancaster to Baileys, 40 mi
CA 138   CA 138 Define I-5 (former US 99) near Baileys to Route 48 near Lancaster
LRN 60 San Juan Capistranto to Oxnard, 86 mi
CA 1   CA 1 Define San Juan Capistrano to Oxnard (a short portion was cosigned as US 91)
LRN 61 La Canada to Mt. Wilson Road via Arroyo Seco, 10 mi
CA 2   CA 2 Define LRN 9 near La Cañada Flintridge to Mt. Wilson Road (Red Box Gap) via Arroyo Seco
LRN 62 Azuza to Pine Flats in San Gabriel Canyon, 10 mi
CA 39   CA 39 Define Azusa to Route 2 near Pine Flats in San Gabriel Canyon
LRN 63 Big Pine to Oasis, 40 mi
CA 168   CA 168 Define US 395 near Big Pine to Route 266 near Oasis
LRN 64 Mecca to Blythe, 100 mi
US 70 US 60, CA 195 None Define Route 111 near Mecca to Shavers Summit (this segment superseded in 1931)
US 70 US 60 I-10 Define Shavers Summit to Blythe

1920

In its 1919-1920 Biennial Report, the State Highway Commission began to identify the problems with funding highway construction through bond acts. They recommended a tax on gasoline sales. This was not enacted until 1923.


1921

In 1921, the California Legislature created the Department of Public Works, which included the State Highway Commission, the State Water Commission, and the newly created Division of Highways.

The following routes were defined by the 1921 statutes (PDF, 118 MB):

LRN First Signage Other Signage Present Route (R) and Signage (S) Action Segment
Rio Vista to Lodi
"An act declaring the improved county road extending from Rio Vista to Lodi to be a state highway.", approved
(June 3, 1921, Chapter 831)
LRN 53 CA 12   CA 12 Extend Rio Vista to Route 99 near Lodi

"The improved county road extending from the town of Rio Vista in the county of Solano to the city of Lodi in the county of San Joaquin, crossing the Sacramento River at Rio Vista, thence crossing Brannan, Andrus, and Tyler Islands to the San Joaquin Cty Line between Tyler and Staten Island to the mainland in San Joaquin Cty on to the improved county highway, thence through Thornton in an general easternly and southernly direction to Lodi."

Chittenden to Point near San Benito River Bridge
"An act declaring and establishing a state highway between a point near Chittenden station in San Benito county, to a point on route two of the state highway in the vicinity of San Benito river bridge."
(June 3, 1921, Chapter 836)
LRN 67
(3 mi)
CA 129   CA 129 Define Route 1 near Watsonville to US 101 near the San Benito River

"That certain highway beginning at the south abutment of a bridge across the Pajaro River (said bridge being 1.125 mi SE of Chittenden Station on the California Central RR) and continuing in a general SE-ly direction for approx 3.1 to a point on LRN 2 in the vicinity of the San Benito River Bridge, all lying in San Benito County..."

San Simeon to Cambria
"An act declaring the county road extending from San Simeon to Cambria to be a state highway and providing for the maintenance thereof."
(June 3, 1921, Chapter 837)
LRN 56 CA 1   CA 1 Extend Cambria to San Simeon

"The county road extending from San Simeon SE-ly to the town of Cambria is hereby...declared to be a state highway"

Mother Lode Highway
"An act declaring the public highway extending from Auburn in Placer County to the Sonora Lateral at Sonora in Tuolumne county to be a state highway."
(June 3, 1921, Chapter 839)
LRN 65 CA 49   CA 49 Define Route 108 near Sonora to I-80:

“All that portion of the public highway commencing at Auburn in Placer County through Placerville, Jackson, San Andreas, and Angels to and connecting with the state highway lateral at Sonoma, Tuolumne county is hereby... declared to be a state highway... highway shall be known as the "Mother Lode Highway".”

Vallejo to Sears Point
"An act directing the department of engineering ... to investigate and report upon a proposed state road with the necessary bridges connecting the city of Vallejo with the state highway at a point near Sears Point on the Black Point cut-off road in Southern Sonoma County"
(August 9, 1921, Chapter 841)
LRN 208 CA 48   CA 37 Research Vallejo to Sears Point

“...to make an investigation and submit a preliminary report upon a proposed state road with the necessary bridges connecting the city of Vallejo with a point on the state highway near Sears Point in Sonoma County... Beginning at the intersection of Butte and Tennessee Streets in Vallejo, and running thence N-ly along Wilson Avenue to the limits of said city, thence continuing along the paved county roads through the Bay terrace district to a point in the vicinity of the lands formerly owned by Vallejo Brick and Tile Company, thence leaving the mainland and running W-ly across the Napa river to island number one: situated on the immediate W bank of the Napa river and immediately N of Marc island and adjacent to the E short of San Pablo bay; thence NW-ly along said San Pablo shore levee to a point near the mouth of Sonoma creek and running W-ly across Tubbs island and across Tolay creek to a junction with the state highway in the vicinity of Sears point.”
The portion of this from Sears Point to Vallejo was added to the state highway system formally in 1939, when presumably the investigation authorized by this Chapter was completed.

This was formally repealed by 1935 Chapter 29, Article XX.

Manteca to Mossdale School
"An act providing for the taking over by the State of California of a certain road in the county of San Joaquin..."
(June 3, 1921, Chapter 845)
LRN 66
(4 mi)
CA 120   CA 120 Define I-5 to Route 99

“...to transfer and convey ... that certain road situated in the county of San Joaquin ... to wit: Beginning at a point on the W boundary of the city of Manteca, and on the township line between T1S and T2S, R7E, Mt Diablo base and meridian, and running thence W on the township line to the W side of the Southern Pacific RR RoW to the state highway at the Mossdale School...”

Alturas-Nevada Line
"An act making an appropriation to pay the cost of making a survey and preparing plans and estimates for the construction of a highway from the town of Alturas in Modoc county to the Nevada-California state line by the most direct and practical route via Cedarville connecting with the proposed Nevada state highway."
(June 3, 1921, Chapter 888)
LRN 28 US 299   US 299 Extend Alturas to the Nevada State Line

“...for the survey, plans and estimates and for the construction of the highway from the town of Alturas in Modoc county to the Nevada-California state line by the most direct and practical route via Cedarville in connecting with the proposed Nevada state highway...”


1923

In 1923, the State Highway Commission was removed from the Department of Public Works (DPW), and made a separate state agency largely responsible for the highway matters previously handled by the DPW. In 1923, the Highway Commission also created three new "Divisions" ("Districts") with offices in Stockton, Bishop, and San Bernardino. This brought the total number of districts to ten.

1923 also saw a shift in how bridge construction was funded. Prior to 1923, the Highway Commission required that counties provide most of the right-of-way, designs, and construction funding needs for most new State Highways. There were a few exceptions, such as the small concrete girder bridge with pipe railings that crosses Shotgun Creek, built in 1915 and designed by State Highway engineers. In general, however the arrangement was unsatisfactory. As a result, in 1923, State Highway Engineer R.M. Morton directed that all State Highway bridges be designed, and their construction overseen, by state engineers. This resulted in the creation of the Bridge Department in the DPW.

Funding was also helped in 1923, when the California's legislature passed California's first gasoline tax. Revenue from the $0.02/gallon tax was divided between the state and the counties for highway building and improvement. The idea for such a tax dates back to recommendations from the Auto Club back in 1921, and from the State Board of Equalization and the Highway Commission in 1922. The Motor Vehicle Act of 1923 strengthened the states's highway finances, and gave additional resources to counties. Note that the tax had an explicit prohibition against its use for new construction; this prohibition was removed in 1927.

The following routes were defined by the 1923 statutes (PDF, 96 MB)

LRN First Signage Other Signage Present Route (R) and Signage (S) Action Segment
Truckee to Nevada Line
"An act declaring and establishing a state highway from the town of Truckee running in a northeasterly direction to the Nevada state line at or near Verdi."
(May 3, 1923, Chapter 100)
LRN 38 US 40   I-80 Adjust This act amended 1919, Chapter 66, which established the Truckee to Nevada State Line routing

“A certain highway in Nevada and Sierra counties, running substantially describedas follows: From a point in the town of Truckee where the present state highway branches at the subway under the Southern Pacific tracks going toward Lake Tahoe, continuing through the town of Truckee, crossing Prosser Creek and over what is known as the "Dog Valley Grade" as far as the state line about 1 mi NW of Verdi, Nevada..." and by the most practicable route to the Nevada State Line at or near Verdi, Nevada

I-80 between Truckee and the Nevada state line
Note that this is redundant with the 1919 extension of LRN 38.
Bay Shore Highway (San Francisco to San Mateo)
"An act authorizing and directing the California highway commission to lay out and acquire a right of way or rights of way for a highway or highways from the county line of the city and county of San Francisco, in, to and through San Mateo county..."
(May 18, 1923, Chapter 181)
LRN 68 US 101   US 101 Define San Mateo to San Francisco

“...to layout and construct a highway or highways from the county line separating the city and county of San Francisco in, to, and through the county of San Mateo, as such location or locations as the said California Highway Commission may select...”


1924

[Federal Shield]In November 1924, the American Association of State Highway Officials proposed the Federal Highway System to coordinate the naming and marking of interstate highways. They prepared a resolution requesting the Secretary of Agriculture to select a system of highways, and appointed a board to perform a study and make recommendations in March 1925. Initial routes were selected from the Federal Aid Road System, and it was decided that routes be marked by means of a standard highway marking sign. The basic goal was to have the US Highway milage be no more than 3% of the total certified rural miles in the state. California's eventual milage was 2,220 miles, or 3.1%.


1925

In 1925, the Legislature passed the Melville Act, which provided that the state take over all traversable highways, abolish toll roads, and build highways through the small cities that could not afford them. This extended the responsibility of the Division of Highways beyond rural road construction. The act also permitted the Highway Commission to relinquish roads, provided that they had the consent of the local governing body.

Also in 1925, AASHTO adopted the numbering system for the Federal Highway system.

The following routes were defined in the 1925 statutes (PDF, 80.4 MB):

LRN First Signage Other Signage Present Route (R) and Signage (S) Action Segment
San Rafael to San Quentin
"An act declaring the public highway extending from Irwin street within the corporate limits of the city of San Rafael, in Marin county, California, to Point San Quentin, in Marin county, California, to be a state highway."
(April 20, 1925, Chapter 82)
LRN 69 US 48   I-580 Define San Rafael to San Quentin

“All that portion of the public highway commencing at Irwin Street, within the corporate limits of the city of San Rafael, in Marin county, California, and leading therefrom to Point San Quentin, in Marin county, California, and known as the San Rafael-San Quentin road is hereby declared to be a state highway...”

Needles to Topock
"An act authorizing and directing the California highway commission to acquire necessary rights of way, and to construct and maintain...a state highway, extending from Needles...to a point...on the boundary line between the State of California and the state of Arizona opposite the town of Topock, Arizona..."
(May 22, 1925, Chapter 279)
LRN 58 US 66   I-40 Extend Needles to Topock AZ

“...to acquire necessary rights of way and to construct and maintain a highway, which shall constitute and be a state highway, extending from Needles or from a point to be selected by the California Highway Commission upon the route of the state highway extending from San Bernardino to Needles in the county of San Bernardino to a point to be selected by the California Highway Commission and the state of Arizona opposite the town of Topock, Arizona or at such other point thereon as may be selected by said California Highway Commission...”

Oxnard Connection
"An act authorizing and directing the California highway commission to acquire necessary rights of way and to construct and maintain...a state highway, extending from the town of Oxnard to a point...upon the state highway extending from Los Angeles to Ventura, such point to be at or near the town of El Rio..."
(May 22, 1925, Chapter 309)
LRN 60 CA 3 US 101A CA 1 Extend Oxnard to El Rio

“...to acquire necessary rights of way and to construct and maintain a highway, which shall constitute and be a state highway, and to take over any existing public highway along the route hereinafter designated as a part of said state highway, from the town of Oxnard to a point to be selected by the state highway commission at or near the town of El Rio, Ventura county, upon the state highway extending from Los Angeles to Ventura.”

Crescent City to Oregon line
"An act providing for the taking over by the State of California of a certain road in the county of Del Norte, and declaring the same to be a state highway..."
(May 23, 1925, Chapter 335)
LRN 71 US 101   US 101 Define US 101 near Crescent City to the Oregon state line. Note that this may actually have been part, at one time, of LRN 1

“...to transfer and convey unto the State of California that certain road situate in the said county of Del Norte and described as follows: Commencing at a point where the Redwood highway of the state of Oregon intersects the common boundary line between the state of Oregon and the state of California, and running thence in a S-ly direction along the course of the right of way of the present county road or highway through Smith River Valley, thence crossing Smith River at the present county bridge or site more feasible to connect with the present county road on the S bank of Smith river, thence along the present county road or highway by the acreage leased [by] the California Highway Commission for repair shop sites by the County of Del Norte and connecting at Crescent City with the Redwood Highway...”

Ukiah to Mendocino State Hospital
"An act providing for the taking over by the State of California of a certain road in the county of Mendocino and declaring the same to be a state highway..."
(May 23, 1925, Chapter 351)
LRN 70 CA 222   CA 222 Define US 101 near Ukiah to Mendocino State Hospital

“...to transfer and convey unto the State of California that certain road situate in the said county of Mendocino and described as follows: Commencing at a point on the state highway 2446 ft from the S boundary of the town limits of the town of Ukiah city and running thence in an E-ly direction along the course of the right of way of the present county road to the W line of the grounds of the Mendocino State Hospital...”

Barstow-Jean Highway (Arrowhead Trail)
"An act authorizing and directing the California highway commission to acquire necessary rights of way, and to construct and maintain a highway, which is hereby declared to be a state highway, extending from Barstow...to a point...on the boundary line between the state of California and the state of Nevada...which said highway is commonly known and referred to as the Arrowhead trail."
(May 23, 1925, Chapter 369)
LRN 31 US 91 US 466 I-15 Extend Barstow to Nevada state line

“to acquire the necessary right of way and to construct and maintain a highway, which shall constitute and be a state highway extending from Barstow in the county of San Bernardino to a point to be selected by the California Highway Commission on the boundary line between the state of California and the state of Nevada near the town of Jean Nevada or at any such other point thereon as may be selected by said California highway commission, which said highway is commonly known and referred to as the Arrowhead Trail.”

Angels Camp to Calaveras Big Trees
"An act declaring the county road in Calaveras county, extending from Angels Camp through Vallecita and Murphy to Calaveras Big Trees in the national forest to be a state highway."
(May 23, 1925, Chapter 375)
LRN 24 CA 4   CA 4 Extend Route 49 near Angels Camp to Calaveras Big Trees

“That certain county road in Calaveras County commencing at a point where such highway connects with the Mother Lode State Highway at Angels Camp, extending through Vallecita and Murphy and connecting with the Alpine State Highway at Calaveras Big Trees in the national forest is hereby declared to be a state highway...”

Bay Shore Highway (San Francisco to San Jose)
"An act to provide for the establishment of a highway, to be known as the Bay Shore highway, in the counties of San Francisco, San Mateo and Santa Clara."
(May 23, 1925, Chapter 471)
LRN 68 US 101   US 101 Extend San Jose to San Mateo

“...to lay out or construct a highway or highways from a point at or near the intersection of Army Street and San Bruno Avenue in the city and county of San Francisco, thence through the county of San Mateo to a point in the city of San Jose in the county of Santa Clara to be selected by the California Highway Commission....”
Note: There was a note from the governor with this indicated that the city of San Francisco must pay for the highway within the city, and is expected to help financially with the construction in San Mateo as agreed to in the 1923 act.


1926

1926 saw the design of the Federal Highway Shield. Signing didn't begin in California until 1928.


1927

In 1927, California's legislature passed the Breed Bill, adding $0.01 to the gasoline tax. The additional tax was to be used exclusively for highway construction. This act also required that 51% of construction monies be allocated to Northern California, and 49% of the monies to Southern California. This latter issue was readdressed in 1947.

Also in 1927, the DPW was reconstituted to have four divisions, including the Division of Highways, which was in charge of the State Highway Engineer. The Highway Commission was expanded to five members, and was given the power to alter state highway routes, abandon unneeded sections, and condemn rights of way.

Lastly, in 1927, the State Highway Classification Act (Chapter 794) was passed. This defined the 40 primary state highway routes.

LRN First Signage Other Signage Present Route (R) and Signage (S) Action Segment
LRN 1 US 101
US 199
   US 101
US 199
CA 254
CA 271
CA 283
Define as Primary From a point in Marin County opposite San Francisco to the Oregon Line by way of the Smith River
LRN 2 US 101   US 101
I-5
San Diego
County Route S21
CA 72
CA 1
CA 135
CA 82
Define as Primary From San Francisco to San Diego
LRN 3 US 40
CA 65
US 99E
US 99
US 99E
CA 256
CA 160
CA 51
Business Route 80
I-80
CA 65
CA 99
I-5
CA 3
CA 263
CA 265
CA 275
Business Route 5
Define as Primary From Sacramento to the Oregon Line
LRN 4 US 99 US 6
CA 7
US 50
I-5
CA 14
CA 99
CA 204
Business Route 99
Define as Primary From Sacramento to Los Angeles
LRN 5 CA 13
CA 21
CA 9
US 48
US 50
CA 17
CA 21
I-5W
US 50
CA 4
CA 17
I-880
I-680
CA 262
CA 238
I-580
CA 4
Define as Primary From Stockton to Santa Cruz by way of Hayward, together with a connection from Hayward to Oakland
LRN 6 US 40
US 50 
US 99W
CA 275
I-80
CA 51
Business Route 80
Define as Primary From Sacramento to Woodland Junction
LRN 7 US 40
US 40A
US 99W
US 99W I-80
CA 113
I-5
Define as Primary  From Benecia to Tehama Junction
LRN 8 CA 48
CA 37
CA 28
CA 12
CA 37
CA 29
CA 37
CA 221
CA 29
CA 12
Define as Primary From Ignacio to Cordelia by way of Napa
LRN 9 CA 118
US 66
CA 118
I-210
Define as Primary From San Fernando to San Bernardino
LRN 10 CA 198   CA 198  Define as Primary That part of [LRN 10] from Hanford to Sequoia National Park
LRN 11 US 50    US 50  Define as Primary That part of [LRN 11] from Sacramento to Placerville
LRN 12 US 80    I-8
San Diego County Route S80 
Define as Primary From San Diego to El Centro
LRN 13 CA 108
CA 120 
CA 108  CA 219
CA 108
CA 120 
Define as Primary That part of [LRN 13] from Salida to Sonora
LRN 14 US 40    CA 123  Define as Primary From Albany to Martinez
LRN 15 CA 20    CA 20  Define as Primary That part of [LRN 15] from Williams to Colusa
LRN 16 Unknown    CA 175  Define as Primary From Hopland to Lakeport
LRN 17 US 40
CA 49 
  I-80
CA 49 
Define as Primary From Roseville to Nevada City
LRN 18 CA 140
CA 120 
  CA 140
CA 120
CA 108 
Define as Primary From Merced to Yosemite National Park
LRN 19 US 60  US 395
I-15E
CA 194
CA 71 
I-215  Define as Primary From [LRN 9] W of Claremont to Riverside
LRN 20 CA 44  US 299  CA 299  Define as Primary That part of [LRN 20] from Redding to Watsonville
LRN 21 CA 162
CA 24 
US 40 CA 162
CA 70 
Define as Primary From [LRN 3] near Richvale via Oroville to Quincy
LRN 22 CA 156
CA 152 
  CA 156
CA 152 
Define as Primary From San Juan Bautista to Hollister
LRN 23 CA 7
CA 89 
US 395
US 6
CA 4 
US 395
CA 14
CA 89 
Define as Primary That part of [LRN 23] from Saugus to Markleville
LRN 24 CA 12
CA 4 
  CA 12
CA 4 
Define as Primary That part of [LRN 24] from [LRN 4] near Lodi to San Andreas
LRN 25 CA 49    CA 49  Define as Primary From Nevada City to Downieville
LRN 26 CA 18
US 70
US 99 
US 99
US 60 
CA 18
I-10
CA 86 
Define as Primary From San Bernardino to El Centro
LRN 27 US 80    I-8
CA 115 
Define as Primary From El Centro to Yuma
LRN 28 CA 41  US 299 CA 299  Define as Primary That part of [LRN 28] from Redding to Alturas
LRN 29 CA 7
CA 36 
CA 172  CA 36
US 395
CA 172 
Define as Primary That part of [LRN 29] from Red Bluff to Susanville
LRN 31 US 91  US 395 
I-15E
CA 194
US 66
I-215
I-15 
Define as Primary From San Bernardino to the Nevada State Line near Calada, by way of Barstow
LRN 34 Unknown    CA 104
CA 88 
Define as Primary That part of [LRN 34] from [LRN 4] near Arno to Jackson
LRN 37 US 40    I-80 Define as Primary That part of [LRN 37] from Auburn to Truckee
LRN 38 CA 89
US 40 
  CA 89
I-80 
Define as Primary That part of [LRN 38] from Truckee to the Nevada State Line near Verdi by way of the Truckee River Canyon
LRN 58 US 466
US 66 
  CA 58
I-40 
Define as Primary From Barstow to Needles to the Colorado river near Topoc Arizona
LRN 58a US 466    CA 58  Define as Primary From Mojave to Barstow
LRN 60 CA 1
CA 3 
US 101 CA 1  Define as Primary From [LRN 2] near El Rio to [LRN 2] S of San Juan Capistrano
LRN 64 US 70  US 60
CA 195 
I-10  Define as Primary From Mecca to Blythe
LRN 66 CA 120    CA 120  Define as Primary From Manteca to [LRN 5] near Mossdale School
LRN 68 US 101    US 101  Define as Primary The Bay Shore Highway from San Francisco to San Jose
LRN 71 US 101    US 101  Define as Primary From Crescent City N to the Oregon State Line near Chetco

All other highways now or hereafter included within or constituting any part of the state highway system were classified as secondary state highways.


1928

In 1928, the California State Automobile Association and the Automobile Club of Southern California began erecting Federal Highway shields and other highway signs in California.


1929

In 1929, the Legislature created the California Toll Bridge Authority, which was authorized to acquire or construct and operate toll bridges within the state, and to issue bonds for this purpose.

LRN First Signage Other Signage Present Route (R) and Signage (S) Action Segment
Bakersfield, Maricopa and Ventura State Highway
"An act to amend section 1 of an act entitled "An act declaring and establishing a state highway from the city of Bakersfield through a portion of the counties of Kern, San Luis Obispo, Santa Barbara and Ventura to the city of San Buenaventura, designated and known as the Bakersfield, Maricopa and Ventura state highway," approved June 16, 1913, relating to state highways."
(May 28, 1929, Chapter 541)
LRN 138 US 399   Route 33,
Route 119
Adjust This act amended the 1913 definition of this highway, truncating the route to the Ventura-Cuyama Valley.

“…is amended to read as follows: A certain highway now partly constructed by the several counties through which the same passes and by joint highway district number six of the State of California and running substantially along the following lines: Commencing at a point in the Cuyama river valley on the state highway running between Santa Maria, Maricopa, and Bakersfield, and known as [LRN 57] of the state highway system, and running thence SE-ly up the Cuyama river valley to a point in Ventura County; thence S-ly over the Coast Range mountains and through the Santa Barbara national forest to Matilja Hot Springs; thence SE-ly to the city of San Buenaventura. The entire length from San Buenaventura (Ventura) to [LRN 57] of the state highway in the Cuyama valley is hereby declared to be, and is hereby constituted, a state highway... provided that said highway shall not become a state highway ... until said highway shall have been fully completed.”

Big Oak Flat and Yosemite Road
“An act to amend section 1 of an act entitled "An act to take title to and thereafter maintain as a state highway, the toll road in Tuolumne and Mariposa counties, known as the Big Oak Flat and Yosemite road, also a section of Tuolumne county road to connect said toll road with the Sonora lateral of the state highway," approved May 19, 1915, providing for the rerouting of said highway and the improvement and maintenance thereof.”
(May 28, 1929, Chapter 537)
LRN 18
LRN 40
CA 120   CA 120/RS
CA 108/S
Adjust This act amended the 1915 definition of this highway.

“That all that certain highway in Tuolumne and Mariposa Counties known as the Big Oak Flat and Yosemite road, beginning on the Sonora lateral, [LRN 13], and running thence in a general E-ly direction through Big Oak Flat and Buck Meadows to the Yosemite national park boundary at Crane Flat is hereby declared a state highway...”


1930

In a report from the California Highway Commission, specific criteria were established for the designation of a route as a state highway. These required that the potential state highway carry a large volume of state traffic, afford relief to heavy traffic on present state roads, and serve as important interstate links.


1931

This is another year of minor growth with the passage of Chapter 82 (approved March 25, 1931) and Chapter 96 [which said the same thing] (approved April 1, 1931, effective August 14, 1931) of the 1931 Statutes (PDF, 165.4 MB), which established "certain additional state highways and classifying them as secondary highways". Note that most of the routes extended in this year were parts of the US highway system.

LRN First Signage Other Signage Present Route (R) and Signage (S) Action Segment
LRN 73 “(a) Alturas to Oregon State Line near New Pine Creek” (Chapter 82)
CA 7   US 395 Define Alturas to the Oregon state line
LRN 21 “(b) Quincy to [LRN 29] via Chats” (Chapter 82)
US 40A   CA 70 Extend Quincy to US 395 (LRN 29) via Chats
LRN 74 “(c) Vallejo to [LRN 8]” (Chapter 82)
CA 141   None Define Extension of I-780 from I-80 into Vallejo
CA 29   CA 29 Define I-80 near Vallejo to Route 12 near Napa
LRN 75 “(d) Walnut Creek to Oakland” (Chapter 82)
CA 24   CA 24 Extend I-580/I-980 junction near Oakland to I-680 near Walnut Creek
LRN 72 “(e) Weed to California-Oregon State Line, near Calor” (Chapter 82)
US 97   US 97 Define I-5 near Weed to the Oregon state line
LRN 76 “(f) Bishop to California-Nevada State line (Montgomery Pass)” (Chapter 82)
CA 168 US 6 US 6 Define US 395 near Bishop to Nevada state line
LRN 58 “(g) Bakersfield to Mojave” (Chapter 82)
US 466   CA 58 Extend Route 99 to Route 14 (former US 6)
LRN 61 “(h) Red Box Divide to Pine Flats ([LRN 61] to [LRN 62])” (Chapter 82)
CA 2   CA 2 Extend Mt. Wilson Road (Red Box Gap) to Route 39
LRN 26
LRN 77
“(i) [LRN 26] near Colton via Pomona to Los Angeles” (Chapter 82)
US 60 US 70
US 99
CA 212
None Define LRN 77: Downtown Los Angeles to Holt along Valley Blvd
US 70 US 99
US 60
I-10 Extend LRN 26: Monterey Park to Colton via Pomona
LRN 43 “(j) [LRN 43], Waterman Canyon via Santa Ana Canyon to Newport Beach” (Chapter 82)
CA 55   CA 55 Extend Newport Beach to Route 91
CA 18 US 91 CA 91 Extend Route 55/Route 91 junction to Route 60
US 91 US 395
I-15E
CA 18
I-215
CA 18
Extend Route 91/Route 60 junction to Route 30
LRN 19 “(k) Beaumont to Riverside” (Chapter 82)
US 60   CA 60 Extend Riverside to Beaumont (I-10)
LRN 77
LRN 78
“(l) Riverside to San Diego (Inland Route)” (Chapter 82)
US 395   I-15 Define LRN 77/I-15: I-215 near Temecula to Route 163/I-15 junction
US 395   CA 163 Define LRN 77/CA 163: Route 163/I-15 junction to I-5
US 395 I-15E
CA 194
I-215 Define LRN 78/I-215: I-15 near Temecula to Route 60 near Riverside
US 395   CA 74 Define LRN 77 (later LRN 64): I-15 near Lake Elsinore to I-215 near Perris
LRN 77 “(m) Pomona to Temecula” (Chapter 82)
CA 71   CA 71 Define I-10 near Pomona to Route 91 near Corona
CA 71   I-15 Define Route 91 near Corona to I-215 near Temecula
LRN 64 “(n) Blythe to California-Arizona state line at the Colorado River and [LRN 64] to [LRN 26] near Indio” (Chapter 82)
US 70 US 60 I-10 Extend Indio to Shavers Summit
US 70 US 60 I-10 Extend Blythe to the Arizona state line
LRN 2 “(o) National City to International Boundary Line near Tia Juana” (Chapter 82)
US 101   I-5 Extend San Diego to the Mexico border
LRN 26 “(p) El Centro to Calexico” (Chapter 82)
US 99   CA 111 Extend Route 86/Route 111 E of Haber to Calexico
LRN 63 “(q) Oasis to California-Nevada State Line” (Chapter 82)
CA 266   CA 266 Extend Route 168 near Oasis to the Nevada state line
LRN 79 “(r) [LRN 2] near Ventura to [LRN 4] at Castaic Junction” (Chapter 82)
CA 126   CA 126 Define US 101 to I-5 via Santa Paula
LRN 59 “(s) From [LRN 31] near Cajon Pass to [LRN 23] near Lancaster” (Chapter 82)
CA 138   CA 138 Extend Route 48 to I-15 (former US 91)
LRN 19 “(t) Pomona to Fullerton via Brea Canyon” (Chapter 82)
Unknown   CA 57 Extend I-5 to Route 60 near Walnut
CA 71 CA 215 None Extend Route 60 near Pomona to US 66 along Garey Avenue
LRN 56 “(u) Cambria to San Luis Obispo” (Chapter 82)
CA 1   CA 1 Extend US 101 in San Luis Obispo to Cambria
LRN 80 “(v) Santa Barbara to [LRN 2] at Zaca via San Marco Pass” (Chapter 82)
CA 154   CA 154 Define US 101 near Zaca to Santa Ynez
CA 150   CA 154 Define Santa Ynez to Santa Barbara
LRN 7 “(w) [LRN 14] near Crockett to American Canyon Route near Vallejo” (Chapter 82)
US 40   I-80 Extend Pomona Street near Crockett to Route 29 near Vallejo


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