Updated 2026-10-20

How California's streets were built for cars

In the 1930s a federal agency graded California's neighborhoods for mortgage lending. Freeways came after. Here is the record, each entry dated and linked to a government source, and the old grades mapped over today's freeways and crashes.
A “Best”B “Still Desirable”C “Definitely Declining”D “Hazardous”Freeways today
  1. 1933

    Congress creates the Home Owners’ Loan Corporation.

    A federal agency that made long-term home loans to owners who couldn't get them elsewhere. From 1935 to 1940 it surveyed cities to judge the future value of their real estate, and mapped their neighborhoods. These are the 416 areas it drew in Los Angeles.

    National Archives, Record Group 195

  2. 1938

    The FHA writes down what protects a neighborhood.

    The Federal Housing Administration's manual for insuring mortgages, on rating a location:

    “A high speed traffic artery or a wide street parkway may prevent the expansion of inharmonious uses to a location on the opposite side of the street.”
    Underwriting Manual, paragraph 935

    The same paragraph counts “inharmonious racial groups” among the “adverse influences” a barrier keeps out.

    FHA Underwriting Manual, 1938 (HUD User)

  3. 1939

    The HOLC grades Los Angeles.

    Every area gets a letter: A, “Best”; B, “Still Desirable”; C, “Definitely Declining”; D, “Hazardous”. 57 areas are graded A and 71 are graded D.

    The map on Mapping Inequality

  4. 1939–1968

    71 areas are marked “Hazardous”.

    These are the areas the HOLC graded D.

    Courts stop enforcing racial covenants in 1948. Discrimination in the sale, rental and financing of housing is banned in 1968.

    Shelley v. Kraemer, 334 U.S. 1 (Library of Congress) · HUD

  5. 1940s

    The first freeways.

    First sections open: the Arroyo Seco Parkway (1940), the Hollywood Freeway (1940), the San Bernardino Freeway (1943), the Terminal Island Freeway (1948) and the Santa Ana Freeway (1949). Caltrans calls the Arroyo Seco Parkway California's first freeway.

    In 1944 Congress calls for a national system of interstate highways, without yet paying for it.

    Caltrans history, 1940s · Metro library, June 15 · LADOT · California Highways and Public Works, Sept–Oct 1948 · Metro library, April 4 · FHWA, Interstate history

  6. 1945–1963

    The streetcars give way to buses.

    In 1945 National City Lines buys the Los Angeles Railway; General Motors, Mack, oil and tire companies are among its stockholders. In 1949 a jury convicts the companies of conspiring to monopolize the sale of buses and supplies to the transit companies they controlled.

    The last Red Car runs to Long Beach in 1961. In 1963 the last streetcar lines in Los Angeles become bus lines.

    LA Metro library · Senate Antitrust Subcommittee hearings, 1974, pp. 1871–1886 (govinfo) · LA Metro library, April 8 · LA Metro library, March 31

  7. 1950s

    Washington pays for the Interstates.

    In 1956 the Federal-Aid Highway Act sets the federal share of the Interstate system's cost at 90 percent, paid from a trust fund filled by fuel and vehicle taxes.

    First sections open: the Harbor Freeway (1952), the Long Beach Freeway (1952), the Foothill Freeway (1955), the Golden State Freeway (1957) and the San Diego Freeway (1957).

    FHWA, Interstate cost history · California Highways and Public Works, Mar–Apr 1963 · Metro library, December 10 · Metro library, October 28 · Metro library, September 6 · Metro library, March 29

  8. 1960s

    6 more freeways.

    First sections open: the Ventura Freeway (1960), the Santa Monica Freeway (1962), the Glendale Freeway (1962), the Antelope Valley Freeway (1963), the San Gabriel River Freeway (1964) and the Pomona Freeway (1965).

    Metro library, April 5 · California Highways and Public Works, Mar–Apr 1963 · California Highways and Public Works, Sept–Oct 1963 · California Highways and Public Works, Mar–Apr 1965 · California Highways and Public Works, Nov–Dec 1965

  9. 1993

    The Century Freeway.

    Opened in 1993, “billed as the last new freeway in Los Angeles”.

    Caltrans, historic transportation context, Appendix C

  10. Today

    32 of the 71 “Hazardous” areas have a freeway through them.

    Against 7 of the 57 areas graded A. An area counts from about 250 feet of a freeway. This shows where freeways run, not why each was routed there. In black, every freeway there today, including a few whose opening year we found no government source for.

  11. 1940s–60s

    Boyle Heights: four freeways.

    The HOLC graded area D53 D in 1939. Today I-5, I-10, US 101 and SR 60 run through it, 12.4 miles in all.

    “Two freeways were built in the 1940's and two more in the early 1960's. As a result, Boyle Heights was segmented into four smaller areas and one large area.”
    City of Los Angeles, Boyle Heights Community Plan, 1998

    CalEnviroScreen puts its traffic near homes at the 80th percentile in California and its diesel exhaust at the 93rd.

    Boyle Heights Community Plan (Metro library)

  12. 1940–2023

    Built for driving.

    California’s first freeway, the Arroyo Seco Parkway, opens in 1940.

    In 2023 Los Angeles City Planning counts 72% of the city’s land that allows housing as zoned for single-family homes only.

    Until 2020 the state’s environmental reviews counted traffic delay as a project’s impact. Now they count the miles people drive.

    Today 59.8% of Los Angeles's workers drive to work alone and 6.1% take transit (Census ACS, 2020–2024).

    Caltrans history, 1940s · OPR Technical Advisory, December 2018 · LA City Planning

  13. 2020–2024

    The state and Washington, in their own words.

    “quite literally put up barriers, divided communities, and amplified racial inequities, particularly in our Black and Brown neighborhoods.”
    California State Transportation Agency, quoted by Caltrans, 2020

    Since 2021 federal grants pay to study and rebuild freeways that divide neighborhoods. In 2024 one went to East Los Angeles, which USDOT says “was divided by the construction of I-710 in the 1960s.”

    Caltrans Equity Statement · Public Law 117-58, § 11509 (govinfo) · USDOT award fact sheets, FY 2023

The grades, over today's streets

The HOLC's areas for 8 California cities, with today's freeways drawn dark. Tap an area for the freeways through it, who lives there and their incomes, CalEnviroScreen's traffic measure, and the crashes reported inside it: pedestrians, bicyclists and motorcyclists hurt or killed (2021–2026), and everyone killed in any crash (2020–2024).

Loading the map…

Where the freeways run now.

Every area the HOLC graded in 8 California cities, laid over today's freeways.

48%

of the 155 areas graded D, “Hazardous”, have a freeway through them today.

Each square is one area. Filled: a freeway runs through it.

11%

of the 109 areas graded A, “Best”, have a freeway through them today.

Each square is one area. Filled: a freeway runs through it.

Freeways are OpenStreetMap's motorways today; an area counts from about 250 feet of one. Where freeways are, not why each was routed there. All four grades, by land area

The same maps, seven more cities.

Fresno 1936

4 of 8 D areas with a freeway

Oakland 1937

7 of 20 D areas with a freeway

Sacramento 1937

4 of 7 D areas with a freeway

San Diego 1938

8 of 10 D areas with a freeway

San Francisco 1937

9 of 17 D areas with a freeway

San Jose 1937

6 of 11 D areas with a freeway

Stockton 1938

4 of 11 D areas with a freeway

Explore every area on the map, see crashes in Boyle Heights, or read the record below.

01

The maps that graded neighborhoods

In the 1930s two new federal agencies set the terms for home loans. The Home Owners’ Loan Corporation mapped cities and graded their neighborhoods; the Federal Housing Administration wrote down how it rated a location for insuring a mortgage. California’s courts, voters and lawmakers then took up the same questions.

  1. 1933

    The Home Owners’ Loan Corporation

    Congress created the HOLC by the Home Owners’ Loan Act of 1933 to make “low interest long-term mortgage loans to homeowners unable to procure financing through normal channels.” Its records in the National Archives include a “HOLC City Survey File, 1935-40” and “City maps showing sought-after versus declining neighborhoods, and locations of black population, 1933-39.” These are the maps on this page.

    June 13, 1933 · National Archives, Record Group 195

  2. 1934

    The National Housing Act creates the FHA

    The National Housing Act of 1934 created the Federal Housing Administration, which insures mortgages made by approved lenders. HUD describes the act as “fundamentally changing the federal government’s role in housing.”

    June 27, 1934 · HUD, FHA at 90 · HUD, FHA history

  3. 1938

    The FHA’s Underwriting Manual on barriers and race

    On rating a location, paragraph 935: “Natural or artificially established barriers will prove effective in protecting a neighborhood and the locations within it from adverse influences. Usually the protection from adverse influences afforded by these means includes prevention of the infiltration of business and industrial uses, lower class occupancy, and inharmonious racial groups.” It goes on: “A high speed traffic artery or a wide street parkway may prevent the expansion of inharmonious uses to a location on the opposite side of the street.” Among the deed restrictions it recommends, paragraph 980: “Prohibition of the occupancy of properties except by the race for which they are intended.”

    February 1938 revision · FHA Underwriting Manual, 1938 (HUD User)

  4. 1945

    The Sugar Hill covenant case

    White homeowners in West Adams Heights (“Sugar Hill”) sued their Black neighbors to enforce racial covenants and lost in Los Angeles Superior Court. Judge Thurmond Clarke: “the court is of the opinion that it is time that members of the Negro race are accorded without reservation and evasion the full rights guaranteed them under the 14th Amendment.”

    1945 · Los Angeles · LA City Planning, African American history (SurveyLA)

  5. 1948

    Shelley v. Kraemer

    The Supreme Court: “We hold that in granting judicial enforcement of the restrictive agreements in these cases, the States have denied petitioners the equal protection of the laws.” Courts could no longer enforce racial covenants; the covenants themselves were not struck down.

    May 3, 1948 · Shelley v. Kraemer, 334 U.S. 1 (Library of Congress)

  6. 1963

    The Rumford Fair Housing Act

    In the Supreme Court’s words, the Rumford Act was “prohibiting racial discriminations in the sale or rental of any private dwelling containing more than four units.”

    1963 · California · Reitman v. Mulkey, 387 U.S. 369 (Library of Congress)

  7. 1964

    Proposition 14

    Voters added to the state constitution that no government in California may limit “the right of any person, who is willing or desires to sell, lease or rent any part or all of his real property, to decline to sell, lease or rent such property to such person or persons as he, in his absolute discretion, chooses.” It passed 4,526,460 to 2,395,747.

    November 1964 · California · Reitman v. Mulkey (Library of Congress)

  8. 1967

    Reitman v. Mulkey

    The U.S. Supreme Court upheld the California Supreme Court, which had struck down Proposition 14. The decision’s summary says the provision “authorizes racial discrimination in the housing market and establishes the right to discriminate as a basic state policy.”

    May 29, 1967 · California · Reitman v. Mulkey (Library of Congress)

  9. 1968

    The Fair Housing Act

    Title VIII of the Civil Rights Act of 1968 “prohibited discrimination in the sale, rental, and financing of housing based on race, color, religion, and national origin.”

    April 11, 1968 · HUD · Justice Department

02

Streetcars to buses

Los Angeles had two big streetcar systems: the Los Angeles Railway’s yellow cars in the city and Pacific Electric’s red cars between cities. Both were gone by 1963.

  1. 1945

    National City Lines buys the Los Angeles Railway

    From Metro’s library: “In 1945, the controlling interest in Los Angeles Railway was purchased from the Huntington estate by National City Lines … They renamed it Los Angeles Transit Lines, and at the end of World War II, they sought to substitute buses on most of the existing streetcar lines.” And: “General Motors, Mack Truck, oil and tire companies were among NCL’s stockholders.”

    1945 · Los Angeles · LA Metro library

  2. 1947

    The government charges National City Lines and its suppliers

    The Justice Department charged National City Lines with General Motors, Firestone, Standard Oil of California, Phillips Petroleum, Mack and others. In the Supreme Court’s words, “The basic charge” was conspiring “to acquire control of local transportation companies in numerous cities … and to restrain and monopolize interstate commerce in motorbusses, petroleum supplies, tires and tubes sold to those companies.” Forty-four cities were named, Los Angeles and Oakland among them.

    April 1947 · United States v. National City Lines, 334 U.S. 573 (Library of Congress)

  3. 1949

    The conviction

    A jury found the companies guilty on one count, conspiring to monopolize the sale of buses, tires, tubes and petroleum products to the transit companies National City Lines controlled, and acquitted them on the count of conspiring to control those transit companies. The appeals court affirmed in 1951 (186 F.2d 562). The court records are reprinted in a 1974 Senate hearing.

    1949; affirmed 1951 · Senate Antitrust Subcommittee hearings, 1974, pp. 1871–1886 (govinfo)

  4. 1961

    The last Red Car, Los Angeles to Long Beach

    “The last Pacific Electric Railway streetcar (“Red Car”) runs between Los Angeles and Long Beach — both the first and last interurban passenger line of the former Pacific Electric.” Passenger trains came back to the same route in 1990.

    April 8, 1961 · Los Angeles · LA Metro library, April 8

  5. 1963

    The last streetcars in Los Angeles

    “A fleet of 300 new SilverLiner coaches replace the two last remaining trolley coach lines and five remaining rail lines in Los Angeles.”

    March 31, 1963 · Los Angeles · LA Metro library, March 31

03

Freeways through neighborhoods

Congress planned the Interstate system in 1944 and paid for it from 1956, 90 percent federal money from a trust fund filled by fuel and vehicle taxes. In their own documents, Los Angeles and the U.S. Department of Transportation describe the freeways built through California neighborhoods.

Laid over today's map, the HOLC's areas show where the freeways run now. 74 of the 155 areas graded D have a freeway through them, against 12 of the 109 graded A. By land, D areas hold about 7 times as many miles of freeway per square mile.

HOLC gradeAreasWith a freeway through it todayFreeway miles per square mile
A “Best”10912 (11%)0.12 (7 mi in 56 sq mi)
B “Still Desirable”27350 (18%)0.24 (24 mi in 99 sq mi)
C “Definitely Declining”331103 (31%)0.47 (97 mi in 209 sq mi)
D “Hazardous”15574 (48%)0.79 (95 mi in 121 sq mi)

All 868 graded areas in the 8 California cities the HOLC mapped. Freeways are OpenStreetMap's motorways today; a divided freeway counts once. An area counts as having a freeway through it from about 250 feet of one. This is where freeways run, not why each was routed there.

When Los Angeles's freeways opened

The year each one's first section opened to traffic, from Caltrans, LA Metro's library and LADOT. No government source we found dates the Artesia or Marina freeways.

FreewayFirst sectionWhat the source says
Arroyo Seco Parkway SR 1101940Dedicated December 30, 1940; through the four-level interchange in 1953. Caltrans history, 1940s · LADOT
Hollywood Freeway US 1011940Cahuenga Pass in 1940; the last link in 1954. Metro library, June 15 · Metro library, April 15
San Bernardino Freeway I-101943First section in 1943; through Los Angeles County in 1957. LADOT · California Highways and Public Works, May–June 1957
Terminal Island Freeway SR 1031948Completed as a freeway in 1948. California Highways and Public Works, Sept–Oct 1948
Santa Ana Freeway I-51949First section, Soto Street to Eastman Avenue in Boyle Heights, April 4, 1949. Metro library, April 4
Harbor Freeway I-1101952First section in 1952; to San Pedro in 1962. California Highways and Public Works, Mar–Apr 1963
Long Beach Freeway I-7101952First section, Pacific Coast Highway to 223rd Street, December 1952. Metro library, December 10
Foothill Freeway I-2101955First unit in Altadena and Flintridge, 1955. Metro library, October 28
Golden State Freeway I-51957First unit in 1957; continuous to the San Diego Freeway in 1963. Metro library, September 6 · California Highways and Public Works, Mar–Apr 1964
San Diego Freeway I-4051957First section in 1957; through the Sepulveda Pass in December 1962. Metro library, March 29 · Metro library, December 21
Ventura Freeway US 101 / SR 1341960Through the San Fernando Valley in 1960; to the Golden State Freeway in 1962. Metro library, April 5
Santa Monica Freeway I-101962First sections in 1962; completed to Santa Monica in 1965–66. California Highways and Public Works, Mar–Apr 1963 · Metro library, January 5
Glendale Freeway SR 21962Glendale Boulevard to Fletcher Drive, March 1962. California Highways and Public Works, Mar–Apr 1963
Antelope Valley Freeway SR 141963First 16 miles dedicated August 1963. California Highways and Public Works, Sept–Oct 1963
San Gabriel River Freeway I-6051964First miles in June 1964; completed to the San Diego Freeway in 1966. California Highways and Public Works, Mar–Apr 1965 · California Highways and Public Works, Jan–Feb 1967
Pomona Freeway SR 601965First unit, from the East Los Angeles Interchange, 1965. California Highways and Public Works, Nov–Dec 1965
Century Freeway I-1051993Opened in 1993, “billed as the last new freeway in Los Angeles”. Caltrans, historic transportation context, Appendix C
  1. 1940

    The Arroyo Seco Parkway

    Caltrans: “The Arroyo-Seco Parkway, California and the US’ first freeway, was dedicated on December 30, 1940. This project marked the beginning of the freeway era in the Golden State.”

    December 30, 1940 · Los Angeles · Caltrans history, 1940s

  2. 1944

    The Federal-Aid Highway Act of 1944

    The act “called for designation of a National System of Interstate Highways, to include up to 40,000 miles.” FHWA notes that “neither the 1944 act nor later legislation in the 1940’s authorized funds specifically for the Interstate System.”

    December 20, 1944 · FHWA, Interstate history · 58 Stat. 838 (govinfo)

  3. 1947

    The Collier-Burns Act

    Caltrans: the act “provided $76 million annually for new highway construction. Gas and diesel taxes were raised by 1-1/2 cents a gallon and driver license and registration fees were increased.”

    1947 · California · Caltrans history, 1940s

  4. 1956

    The Federal-Aid Highway Act of 1956

    The act “set the Federal Government’s share of project cost at 90 percent,” and its Title II “created the Highway Trust Fund as a dedicated source for the Interstate System,” filled by federal fuel and vehicle taxes.

    June 29, 1956 · FHWA, Interstate cost history · U.S. Senate history

  5. 1998

    Los Angeles on Boyle Heights’ four freeways

    The city’s Boyle Heights Community Plan: “the construction of four major freeways took place. Two freeways were built in the 1940’s and two more in the early 1960’s. As a result, Boyle Heights was segmented into four smaller areas and one large area.”

    Adopted November 10, 1998 · Los Angeles · Boyle Heights Community Plan (Metro library)

  6. 2023

    USDOT on I-980 in West Oakland

    “The I-980 freeway divides disadvantaged communities in West Oakland from downtown Oakland.” “Construction of the project resulted in the loss of 503 homes, 22 businesses, and four churches – almost all of which belonged to disadvantaged communities.” Caltrans received $680,000 to study what to do with it.

    February 2023 award · Oakland · USDOT award fact sheets, FY 2022 · Caltrans copy

  7. 2023

    USDOT on Shoreline Drive in Long Beach

    “Shoreline Drive was historically part of California’s interstate freeway network (as I-710), a post-World War II “urban renewal” project, which demolished the working-class Magnolia and West Beach neighborhoods, removing homes and businesses and replacing them with the existing divided road that operates at highway speeds.” Long Beach received $30 million to rebuild it.

    February 2023 award · Long Beach · USDOT award fact sheets, FY 2022 · Caltrans copy

  8. 2023

    USDOT on the SR-710 stub in Pasadena

    “From the 1960s onward, targeted investments to increase freeway size, connection, and access ultimately began displacing thriving and mixed-income communities of color in Northwest Pasadena.”

    February 2023 award · Pasadena · USDOT award fact sheets, FY 2022 · Caltrans copy

  9. 2023

    USDOT on SR 99 in Fresno

    “The construction of California State Route 99 ushered in a period of sharp decline for the Jane Addams Neighborhood.”

    February 2023 award · Fresno · USDOT award fact sheets, FY 2022 · Caltrans copy

  10. 2024

    USDOT on I-710 and SR-60 in East Los Angeles

    “The East L.A. neighborhood was divided by the construction of I-710 in the 1960s.” And: “The construction of SR-60 (Pomona Freeway) divided the community in the 1960s, separating Belvedere Park into northern and southern halves.”

    March 2024 award · Los Angeles County · USDOT award fact sheets, FY 2023

  11. 2024

    USDOT on I-5 and the Coronado Bridge in Barrio Logan

    “Interstate 5 bisects the Barrio Logan and Logan Heights communities, and the I-5/SR 75 interchange and Coronado Bridge further dissects Barrio Logan on the west side of I-5.” SANDAG received $2 million to study lids over the freeway.

    March 2024 award · San Diego · USDOT award fact sheets, FY 2023

  12. 2024

    USDOT on US 101 in Hollywood

    From the project summary USDOT published: “US 101 is an open-air below grade eight lane limited access freeway that transformed the landscape by replacing the small middle-class homes, duplexes, and bungalow courts with a concrete trench separating low-income and middle-class families.” $3.6 million went to planning a park over it.

    March 2024 award · Los Angeles · USDOT award fact sheets, FY 2023

  13. 2024

    USDOT on SR-91 in North Long Beach

    From the project summary USDOT published: “SR-91 bisects North Long Beach, a community that is home to roughly 30,000 residents who are primarily low-income and people of color. The freeway has served as a physical barrier for decades.” Long Beach received $1.2 million to plan a loop of paths and parks across it.

    March 2024 award · Long Beach · USDOT award fact sheets, FY 2023

  14. 2024

    USDOT on the Geary expressway in San Francisco

    From the project summary USDOT published: “Geary has an underpass at Fillmore that was constructed in 1961 as an ‘urban renewal’ expressway for commuters to bypass this area and quickly travel downtown. The expressway project widened Geary and decimated existing housing, displacing Black, Asian, and Jewish communities, and creating a division between the Japantown/Fillmore neighborhoods.” San Francisco received $2 million to study it.

    March 2024 award · San Francisco · USDOT award fact sheets, FY 2023

  15. 2024

    USDOT on the Sacramento region

    The Sacramento Area Council of Governments received $22.5 million for ten communities that, in the summary USDOT published, “share the challenge of high volume, autocentric facilities that bisect existing neighborhoods and limit both economic and transportation mobility.”

    March 2024 award · Sacramento · USDOT award fact sheets, FY 2023

04

Why so much driving

Freeways are one part of the record. Zoning, parking rules and the way environmental reviews measured traffic decide what can be built where, and since 2008 California has changed several of those rules. The state’s air board reports that driving per person is still rising.

  1. 1938

    The FHA manual on new and older neighborhoods

    The manual told appraisers that “Successful new areas are recognized as the best mortgage lending areas” (paragraph 976), and that “A location with harmonious surroundings will not decline at the same rate as will a location in a neighborhood containing old structures mixed with new” (909).

    February 1938 · FHA Underwriting Manual, 1938 (HUD User)

  2. 1938

    The FHA manual on cars

    The manual says “The development of modern transportation systems, extensions of, and changes in the routes of transportation lines within individual communities, and the making available of automobiles to families of comparatively low purchasing power, have promoted the development of new residential districts and greatly speeded the rate of declines in the desirability and value of the established ones” (paragraph 1379). It did not favor places reached only by car: “Reliance upon private automobiles alone cannot be considered adequate transportation for any except the higher income groups, and even in these groups suitable public transportation facilities greatly increase the desirability of the area” (983).

    February 1938 · FHA Underwriting Manual, 1938 (HUD User)

  3. 1983

    A transit account in the Highway Trust Fund

    The Surface Transportation Assistance Act of 1982 raised the federal gas tax by 5 cents and, in FHWA’s words, “created a Mass Transit Account in the Highway Trust Fund with 1 cent of the gas tax increase reserved for capital mass transit projects.” Of today’s 18.4-cent federal gas tax, 15.44 cents go to the Highway Account and 2.86 cents to the Mass Transit Account.

    Signed January 6, 1983 · FHWA, 1983 · FHWA Highway Statistics 2024, Table FE-21B

  4. 2008

    SB 375: regional targets for driving emissions

    Each metropolitan region must adopt a “sustainable communities strategy” in its transportation plan, and the Air Resources Board sets each region “greenhouse gas emission reduction targets for the automobile and light truck sector for 2020 and 2035.”

    September 30, 2008 · California · SB 375 (2008)

  5. 2013

    SB 743: traffic delay stops counting as an environmental impact

    The Legislature found that environmental reviews of transportation “typically study changes in automobile delay,” and provided that, once new guidelines were adopted, “automobile delay, as described solely by level of service or similar measures of vehicular capacity or traffic congestion shall not be considered a significant impact on the environment.”

    September 27, 2013 · California · SB 743 (2013)

  6. 2018

    From level of service to miles driven

    The new CEQA Guidelines section 15064.3: “Generally, vehicle miles traveled is the most appropriate measure of transportation impacts,” and “a project’s effect on automobile delay shall not constitute a significant environmental impact.” It applied statewide from July 1, 2020.

    December 2018; statewide from July 1, 2020 · California · OPR Technical Advisory, December 2018 · CEQA Guidelines, 2018 text

  7. 2021

    SB 9: duplexes and lot splits on single-family lots

    Cities must approve, without a hearing, up to two homes on a lot in a single-family zone, and an “urban lot split” that meets the law’s conditions. HCD: “SB 9 facilitates the creation of up to two primary housing units on a parcel typically used for one single-family home.”

    September 16, 2021 · California · SB 9 (2021) · HCD fact sheet

  8. 2022

    AB 2097: no parking minimums near major transit

    “A public agency shall not impose or enforce any minimum automobile parking requirement on a residential, commercial, or other development project if the project is located within one-half mile of public transit,” meaning a major transit stop, with limited exceptions.

    September 22, 2022 · California · AB 2097 (2022) · LA City Planning

  9. 2022

    AB 2147: crossing outside a crosswalk

    Police may no longer stop someone on foot for crossing outside a crosswalk “unless a reasonably careful person would realize there is an immediate danger of a collision with a moving vehicle or other device moving exclusively by human power.” San Diego’s police told officers the “Freedom to Walk Act” “does not legalize ‘jaywalking.’”

    September 30, 2022; in effect January 1, 2023 · California · AB 2147 (2022) · San Diego Police training bulletin

  10. 2023

    Most of Los Angeles’s housing land is single-family only

    Los Angeles City Planning: “In Los Angeles, 72% of land permitting residential uses is restricted to the development of single-family housing.”

    October 2023 · Los Angeles · LA City Planning

  11. 2023

    The air board: driving per person still rising

    The California Air Resources Board’s 2022 progress report: “California is still not reducing GHG emissions from personal vehicle travel as needed to meet climate commitments and as targeted under SB 375. Per capita GHG emissions and per capita VMT continued to increase.” It also found that “In 2019, around 75 percent of California’s commuters drove alone to work.”

    June 2023 · California · CARB 2022 SB 150 Progress Report

  12. 2024

    How much California drives

    Vehicles traveled 325,959 million miles on California roads in 2024, against 340,836 million in 2019 (FHWA, Highway Statistics, Table VM-2).

    2024 · California · FHWA Table VM-2, 2024 · FHWA Table VM-2, 2019

05

Who pays for streets

Property taxes in California are capped by Proposition 13, and most of what they raise goes to schools. City streets are paid from several sources: state fuel taxes, federal money and cities’ own funds.

  1. 1978

    Proposition 13

    “Proposition 13 rolled back most local real property, or real estate, assessments to 1975 market value levels, limited the property tax rate to 1 percent plus the rate necessary to fund local voter-approved bonded indebtedness, and limited future property tax increases.” A property’s taxable value rises by at most 2 percent a year until it is sold.

    June 6, 1978 · California · Board of Equalization, Publication 29 · Legislative Analyst’s Office

  2. 2017

    What paid for local streets

    The State Controller counted about $6.8 billion for city and county streets and roads: 23 percent from the state, 11 percent federal and 66 percent local. For city streets, “The majority of state funding came from money allocated from the Highway Users Tax Fund. Most of the local revenue came from local general fund money,” 29 percent of all money for city streets. Property tax revenue goes mostly to schools: 53 percent in 2022-23, with 12 percent to cities.

    Fiscal year 2016-17 · California · State Controller, Streets and Roads 2016-17 · Board of Equalization, Publication 29

  3. 2017

    SB 1 road repair taxes

    The Road Repair and Accountability Act of 2017 raised the gasoline tax by 12 cents a gallon, indexed to inflation, and added other fuel and vehicle taxes and fees. Its Local Streets and Roads Program “provided nearly $1.5 billion to cities and counties in fiscal year 2022–23.”

    April 2017 · California · California State Auditor, Report 2023-124

06

What’s being done now

Since 2020 Caltrans and the federal government have described the harm in their own words, and both now fund studies and projects to reconnect neighborhoods that freeways divided.

  1. 2020

    Caltrans’ equity statement

    Caltrans “acknowledges that communities of color and under-served communities experienced fewer benefits and a greater share of negative impacts associated with our state’s transportation system,” and that some of these disparities reflect decisions that “quite literally put up barriers, divided communities, and amplified racial inequities, particularly in our Black and Brown neighborhoods.” The quoted words are the state Transportation Secretary’s.

    December 10, 2020 · California · Caltrans Equity Statement

  2. 2021

    The Reconnecting Communities Pilot Program

    The Infrastructure Investment and Jobs Act funds studies and construction “to remove, retrofit, or mitigate” a “highway or other transportation facility that creates a barrier to community connectivity, including barriers to mobility, access, or economic development, due to high speeds, grade separations, or other design factors.” Caltrans: “$1 billion over the next 5 years.”

    November 15, 2021 · Public Law 117-58, § 11509 (govinfo) · Caltrans

  3. 2022

    Highways to Boulevards

    Caltrans’ pilot “was established to plan for and fund the conversion of key underutilized highways in the State into multi-modal corridors to reconnect communities divided by transportation infrastructure,” with $149 million in the 2022-23 budget.

    2022-23 state budget · California · Caltrans · Caltrans FAQ

  4. 2024

    The first Highways to Boulevards places

    The state picked Arcata, South San Francisco and southeast San Diego with National City, “communities historically divided by the construction of highways.” Caltrans’ director: “Caltrans will work hand-in-hand with community-based partners and cities on solutions to reconnect neighborhoods that have been split by highway projects and help heal past harms.”

    March 12, 2024 · California · Governor of California

What this page leaves out

The record below each chapter is a selection, not every law, case or decision, and it covers California. It says what each document says; where a source gives a reason for a decision, the entry quotes it, and where it doesn't, the page doesn't guess one.

The crash counts on the map are for one area at a time. With no counts of how many people walk, ride or drive in each area, comparing areas by crashes would mostly measure how busy they are, so the page doesn't. If you know of a record that belongs here, or find something wrong, tell us on the contact page and include the source.

Common questions

What were the HOLC maps?
Between 1935 and 1940 the Home Owners' Loan Corporation, a federal agency, graded neighborhoods in American cities from A ("Best") to D ("Hazardous") for mortgage lending. 8 California cities were mapped: Fresno (1936), Los Angeles (1939), Oakland (1937), Sacramento (1937), San Diego (1938), San Francisco (1937), San Jose (1937), Stockton (1938). The original maps are in the National Archives (Record Group 195); the outlines on this page are Mapping Inequality's digitized copies.
Do freeways run through the areas the HOLC graded D?
In 74 of the 155 California areas graded D (48%), a freeway runs through the area today, against 12 of the 109 graded A (11%). By land, that is 0.79 miles of freeway per square mile in D areas and 0.12 in A areas, from OpenStreetMap. It shows where freeways are, not why each was routed there.
Does this page say how dangerous a neighborhood is?
No. The map counts the crashes reported inside each area, one area at a time. There are no counts of how many people walk, bike or drive in each area, so the counts are not rates and the page does not compare areas or grades by them.
Why do Californians drive so much?
This page lists the records, not a single cause. In 2019 about 75% of California commuters drove alone to work, and driving per person kept rising, by the California Air Resources Board’s count. Los Angeles City Planning says 72% of the city’s land that allows housing is limited to single-family homes. Until 2020, California’s environmental reviews counted traffic delay as a project’s impact; now they count vehicle miles traveled. Since 2021 state law allows duplexes on most single-family lots (SB 9) and bars parking minimums near major transit (AB 2097).
Are California streets paid for by property taxes?
The State Controller’s figures don’t say how much. For the 2016-17 fiscal year, the State Controller counted about $6.8 billion for city and county streets and roads: 23% from the state, 11% federal and 66% local. For city streets, most local money came from cities’ general funds (29% of all money for city streets), and the Controller doesn’t say which taxes that money came from. Property tax revenue goes mostly to schools: 53% in 2022-23, with 12% to cities (Board of Equalization).

Sources: each entry links its own, all government. HOLC outlines: Mapping Inequality (University of Richmond Digital Scholarship Lab, CC BY-NC 2.5), from the Home Owners’ Loan Corporation residential security maps, National Archives, Record Group 195. Crashes: CCRS with NHTSA FARS deaths merged in (2021–2026); all deaths: FARS (2020–2024). Freeways: OpenStreetMap. Traffic and diesel: CalEnviroScreen 4.0, OEHHA (October 2021). Residents by race and ethnicity, poverty and income: Census ACS 2020–2024 (tables B03002, B17001 and B19013), by tract. Updated 2026-10-20. How the data works.