Interstate 105 (I-105) is an east–west
auxiliary Interstate Highway
Auxiliary Interstate Highways (also called three-digit Interstate Highways) are a supplemental subset of the freeways within the Interstate Highway System of the United States.
Auxiliary routes are generally classified as spur routes, which con ...
in the
Greater Los Angeles
Greater Los Angeles is the second-largest metropolitan region in the United States with a population of 18.5 million in 2021, encompassing five counties in Southern California extending from Ventura County in the west to San Bernardino ...
urban area of
Southern California
Southern California (commonly shortened to SoCal) is a geographic and cultural region that generally comprises the southern portion of the U.S. state of California. It includes the Los Angeles metropolitan area, the second most populous urban ...
. It runs from
State Route 1 (SR 1) near
El Segundo and
Los Angeles International Airport
Los Angeles International Airport , commonly referred to as LAX (with each letter pronounced individually), is the primary international airport serving Los Angeles, California and its surrounding metropolitan area. LAX is located in the W ...
(LAX) to
I-605 in the
City of Norwalk. It is commonly known as the Century Freeway after
Century Boulevard which it parallels, and also officially known as the Glenn Anderson Freeway after the late congressman
Glenn M. Anderson who advocated for its construction.
Route description

The California Streets and Highways Code defines Route 105 as "from Pershing Drive near El Segundo to Route 605", but Caltrans never constructed the segment from Sepulveda Boulevard to Pershing Drive. Motorists can continue west via Imperial Highway over conventional roadway to Pershing Drive, but it is not part of Route 105 nor is it under state maintenance.
I-105 begins at
Sepulveda Boulevard (
SR 1) on the southern edge of
Los Angeles International Airport
Los Angeles International Airport , commonly referred to as LAX (with each letter pronounced individually), is the primary international airport serving Los Angeles, California and its surrounding metropolitan area. LAX is located in the W ...
(LAX), adjacent to the city of
El Segundo. It proceeds generally eastward from there on, crossing the
Los Angeles
Los Angeles ( ; es, Los Ángeles, link=no , ), often referred to by its initials L.A., is the largest city in the state of California and the second most populous city in the United States after New York City, as well as one of the wor ...
and
San Gabriel Rivers before terminating just east of the
San Gabriel River Freeway (I-605) in western
Norwalk.
The freeway stops short of intersecting with the
Santa Ana Freeway (
I-5
Interstate 5 (I-5) is the main north–south Interstate Highway on the West Coast of the United States, running largely parallel to the Pacific coast of the contiguous U.S. from Mexico to Canada. It travels through the states of Californi ...
), its parent interstate. Instead, the primary lanes of I-105 terminate at an
at-grade intersection
An intersection or an at-grade junction is a junction where two or more roads converge, diverge, meet or cross at the same height, as opposed to an interchange, which uses bridges or tunnels to separate different roads. Major intersections ...
with Studebaker Road.
Much of the length of the Century Freeway runs parallel to
Imperial Highway. It also runs parallel to (and south of)
Century Boulevard, from which its original name is derived. Century Boulevard, in turn, is named for its position equivalent to
100th Street in the Los Angeles grid.
The
Los Angeles Metro Rail C Line runs in the median of nearly the entire length of I-105. The C Line's eastern terminus is at
Norwalk, at the interchange between I-105 and I-605; from the western end of the freeway, the C Line separates onto its own right-of-way at
Aviation Boulevard
Aviation Boulevard is a major north–south thoroughfare in western and the South Bay region of Los Angeles County, California.
Route Description
It runs for 7.1 miles (11.4 km), starting near Westchester, and through the beach cities of E ...
, splitting into two branches: one turning south towards
Redondo Beach
Redondo Beach (Spanish for ''round'') is a coastal city in Los Angeles County, California, United States, located in the South Bay (Los Angeles County), South Bay region of the Greater Los Angeles area. It is one of three adjacent Beach Cities, b ...
and one (currently in the testing stages) heading north towards
near LAX and future
people mover
A people mover or automated people mover (APM) is a type of small scale automated guideway transit system. The term is generally used only to describe systems serving relatively small areas such as airports, downtown districts or theme parks. ...
, which is scheduled to open in 2023.
I-105 is part of the
California Freeway and Expressway System
The California Freeway and Expressway System is a system of existing or planned freeways and expressways in the U.S. state of California. It encompasses both State highways and federal highways in California. It is defined by Article 2 (comme ...
,
and is part of the
National Highway System,
a network of highways that are considered essential to the country's economy, defense, and mobility by the
Federal Highway Administration
The Federal Highway Administration (FHWA) is a division of the United States Department of Transportation that specializes in highway transportation. The agency's major activities are grouped into two programs, the Federal-aid Highway Program ...
.
History

Early planning
I-105 was an integral part of a
Caltrans
The California Department of Transportation (Caltrans) is an executive department of the U.S. state of California. The department is part of the cabinet-level California State Transportation Agency (CalSTA). Caltrans is headquartered in Sacra ...
1960s master plan for the
Southern California freeway system, but did not open until 1993. The right-of-way was included on several early highway plans since at least 1947, although it was not named the "Century Freeway" until 1956, and was numbered Route 42. In 1965, the Century Freeway was added to the state system originated at State Route 1 (
Sepulveda Boulevard) east to
Central Avenue in the City of Los Angeles along an alignment very near to the current right-of-way. The current route was added to the Interstate system in 1968.
Design and local opposition
The route was designed between 1968 and 1972 by Caltrans District 7, under the direction of Design Chief Sid Elicks.
However, opposition from some of the communities through which the right-of-way would pass slowed the process and led to some reroutings. Many factors contributed to the delay. The growth of the
environmental movement in the 1960s created resistance to new freeway construction. Fiscal difficulties brought about by the 1971
Sylmar earthquake and the California
tax revolt of the late 1970s further hampered Caltrans' construction efforts.
However, the major source of resistance to the freeway's construction was
community opposition and the side effects of these demands. By the early 1970s, most of the areas in the freeway's path (and thus slated to be demolished) were predominantly
African-American
African Americans (also referred to as Black Americans and Afro-Americans) are an Race and ethnicity in the United States, ethnic group consisting of Americans with partial or total ancestry from sub-Saharan Africa. The term "African American ...
. Resentment over previous freeway projects' effects on other black communities resulted in significant modifications to the original route. Most cities along the way, weary of the noise and visual blight created by elevated freeways, demanded that the route be built far below grade in a "trench". Also, another source for resistance to the freeway's construction was that much of the I-105 path was going to be built in low income, high crime neighborhoods, which also delayed the freeway's construction until the crime in the areas went down.
Norwalk was opposed to the freeway's proposed route through its city center, and blocked the freeway from reaching its intended terminus at the
Santa Ana Freeway; however, Caltrans had already decided to abandon that section due to the inability of the severely congested Santa Ana Freeway to accommodate any more traffic.
''Keith v. Volpe''
In 1972, community opposition resulted in a federal lawsuit, ''Keith v. Volpe,'' being filed, charging a violation of various civil rights protections and the
National Environmental Policy Act (NEPA). An important figure in the freeway's history was
Harry Pregerson, a
United States federal judge
In the United States, federal judges are judges who serve on courts established under Article Three of the U.S. Constitution. They include the chief justice and the associate justices of the U.S. Supreme Court, the circuit judges of the U.S ...
who presided over the lawsuit concerning the freeway's construction and chose to continue presiding over the case despite being promoted to a higher level court. The interchange with I-110 is named the
Judge Harry Pregerson Interchange in his honor. In 1972, Judge Pregerson enjoined the further development of the freeway until it has complied with the requirements of NEPA, the
California Environmental Quality Act (CEQA), the
Federal-Aid Highway Act, and the
Uniform Relocation Assistance and Real Property Acquisition Act of 1970.
In 1979, this lawsuit resulted in a Consent Decree, amended in 1981, which imposed several conditions on development of the freeway, including additional public hearings, preparation of an environmental report, alterations to the design to reduce lanes and intersections, improve carpooling and provide for a transit way, which became the
Los Angeles Metro Rail Green Line
Green Line may refer to:
Places Military and political
* Green Line (France), the German occupation line in France during World War II
* Green Line (Israel), the 1949 armistice line established between Israel and its neighbours
** City Line ( ...
, now known as the C Line. A portion of the right-of-way was also to be constructed below grade to buffer adjacent areas from the effects of
traffic noise. After construction began in the 1980s, failure to perform a full survey of the area's
groundwater
Groundwater is the water present beneath Earth's surface in rock and soil pore spaces and in the fractures of rock formations. About 30 percent of all readily available freshwater in the world is groundwater. A unit of rock or an unconsolidat ...
deposits, combined with the below-grade trench through the city of
Downey, resulted in buckling and cracking along the eastern portions of the route. At one point, a large sinkhole opened in the Bellflower Boulevard on-ramp. This resulted in the construction of an elaborate pump system along the freeway between the interchanges with
I-710
Route 710, consisting of the non-contiguous segments of State Route 710 (SR 710) and Interstate 710 (I-710), is a major north–south state highway and List of auxiliary Interstate Highways, auxiliary Interstate Highway in th ...
and
I-605.
Century Freeway Housing Program
A significant aspect of the ''Keith v. Volpe'' Consent Decree was the requirement that the housing removed to construct the freeway be replaced, leading to the creation of the
Century Freeway Housing Program within the
California Department of Housing and Community Development.
Notable demolished homes and buildings
The childhood home of
Brian,
Carl and
Dennis Wilson of
The Beach Boys was demolished in the mid-1980s to make way for the freeway, as was the house across the street where their bandmate
David Marks grew up. In 2005, the
Beach Boys Historic Landmark was built on the former site of the Wilson brothers' home and declared a California Historic Landmark.
The birthplace of
Metallica
Metallica is an American heavy metal band. The band was formed in 1981 in Los Angeles by vocalist/guitarist James Hetfield and drummer Lars Ulrich, and has been based in San Francisco for most of its career. The band's fast tempos, instru ...
, former bassist
Ron McGovney's house, stood directly in the path of the route nearby to I-605 in
Downey.
Another home in
Downey, California
Downey is a city located in Southeast Los Angeles County, California, United States, southeast of downtown Los Angeles. It is considered part of the Gateway Cities. The city is the birthplace of the Apollo space program. It is also the home ...
, where siblings
Richard
Richard is a male given name. It originates, via Old French, from Old Frankish and is a compound of the words descending from Proto-Germanic ''*rīk-'' 'ruler, leader, king' and ''*hardu-'' 'strong, brave, hardy', and it therefore means 'stro ...
and
Karen Carpenter grew up before forming the musical duo
The Carpenters, was also razed for I-105.
Post-construction

Throughout the difficulties, Congressman
Glenn M. Anderson (
D-
San Pedro) tirelessly advocated for the route's construction, making claims it would provide congestion relief along
Century
A century is a period of 100 years. Centuries are numbered ordinally in English and many other languages. The word ''century'' comes from the Latin ''centum'', meaning ''one hundred''. ''Century'' is sometimes abbreviated as c.
A centennial ...
, Manchester, and Firestone Boulevards and the
Imperial Highway, as well as relieving pressure on the
Santa Monica
Santa Monica (; Spanish: ''Santa Mónica'') is a city in Los Angeles County, situated along Santa Monica Bay on California's South Coast. Santa Monica's 2020 U.S. Census population was 93,076. Santa Monica is a popular resort town, owing to ...
(
I-10) and
San Diego
San Diego ( , ; ) is a city on the Pacific Ocean coast of Southern California located immediately adjacent to the Mexico–United States border. With a 2020 population of 1,386,932, it is the eighth most populous city in the United States ...
(
I-405 Interstate 405 may refer to:
* Interstate 405 (California), a bypass of Los Angeles, California
* Interstate 405 (Oregon)
Interstate 405 (I-405), also known as the Stadium Freeway No. 61, is a short north–south Interstate Highway in Portl ...
) Freeways for travelers between
Downtown Los Angeles and
LAX. After Anderson's death in 1994, Caltrans honored him by renaming the freeway in his honor. However, the route's original name, "Century Freeway", is still used on a number of maps.
The freeway was originally signed with El Segundo as its westbound
control city; however, in recent years, many of the El Segundo signs have been replaced and/or covered with "LAX Airport" signage due to the western terminus' proximity to
Los Angeles International Airport
Los Angeles International Airport , commonly referred to as LAX (with each letter pronounced individually), is the primary international airport serving Los Angeles, California and its surrounding metropolitan area. LAX is located in the W ...
.
Shortly before opening, filmmakers had access to use the empty freeway for a number of weeks to film the 1994 motion picture ''
Speed
In everyday use and in kinematics, the speed (commonly referred to as ''v'') of an object is the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity ...
''.
Interstate 105 (1964–68)
Previously, the I-105 designation was used for
U.S. Route 101 (the
Santa Ana Freeway, US 101) from
I-5
Interstate 5 (I-5) is the main north–south Interstate Highway on the West Coast of the United States, running largely parallel to the Pacific coast of the contiguous U.S. from Mexico to Canada. It travels through the states of Californi ...
(the
Golden State Freeway) at the
East Los Angeles Interchange to the connection to
I-10 (the
San Bernardino Freeway
Interstate 10 (I-10) is a transcontinental Interstate Highway in the United States, stretching from Santa Monica, California to Jacksonville, Florida. The segment of I-10 in California runs east from Santa Monica through Los Angeles, San Bernar ...
; this connection had been
I-110); it went back to US 101 in 1968.
Exit list
See also
*
*
References
External links
California @ AARoads.com - Interstate 105Caltrans: Route 105 highway conditions
{{I-5 aux
05-1
1 (California)
105 105 may refer to:
*105 (number), the number
*AD 105, a year in the 2nd century AD
*105 BC, a year in the 2nd century BC
* 105 (telephone number)
* 105 (MBTA bus)
* 105 (Northumberland) Construction Regiment, Royal Engineers, an English military unit ...
05-1 California
Interstate 05-1
Inglewood, California
Hawthorne, California