California State Route 42

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State Route 42

SR 42 last routing highlighted in red.
Route information
Maintained by Caltrans
Length20.4 mi[1] (32.8 km)
Major junctions
West end SR 1 in Westchester
Major intersections
East end I-5 in Norwalk
CountryUnited States
CountiesLos Angeles
Highway system
SR 41 SR 43

State Route 42 (SR 42) is a decommissioned state highway in the southern region part of the U.S. state of California, running along Manchester Avenue, Manchester Boulevard and Firestone Boulevard in Los Angeles and the cities south of it. After 1968, it ran from State Route 1 west of Inglewood (near Los Angeles International Airport) east to Interstate 5 in Norwalk. Though signed as SR 42, it was officially Route 105 until it was replaced by the parallel Interstate 105 on October 14, 1993.[2] The entire route was deleted from the California Freeway and Expressway System in 2000, with the remaining portion of SR 42 being relinquished to local jurisdictions in that year, but the route is still occasionally signed as SR 42.[3]

Route description

State route 42 began at Lincoln Boulevard (State Route 1) as Manchester Avenue. East of Sepulveda Boulevard, Manchester Avenue crosses into Inglewood where it is known as Manchester Boulevard. It jogs about two blocks to the north just west of Interstate 405, and back to the south after passing downtown Inglewood. Upon crossing back into Los Angeles, it is again Manchester Avenue.

At Central Avenue, the route leaves L.A. and into Florence-Graham (unincorporated LA County city). It becomes Firestone Boulevard and passes through South Gate, Downey, and ending in Norwalk at a merge with Interstate 5 (the Santa Ana Freeway); where SR 42 ended.

Metro Local line 115 operates on Manchester Avenue and Firestone Boulevard.

Manchester Avenue serves a Metro J Line station underneath the Harbor Freeway.

Firestone Boulevard intersects with the Metro A Line light rail, served by the station of the same name in Florence-Graham.


Legislative Route 174 was defined in 1933 to run from pre-1964 Legislative Route 60 west of Inglewood east to pre-1964 Legislative Route 2 near Santa Ana.[4] It was signed as State Route 10 in the initial signage of routes in 1934, running from State Route 3 (now State Route 1) to U.S. Route 101 near the present junction of Interstate 5 and Anaheim Boulevard. (US 101 and LR 2 left the current I-5 alignment north onto Anaheim Boulevard, eventually entering downtown Los Angeles via present State Route 72.)

Note: the present alignment of I-5 between Chapman Avenue in Anaheim and Main Street in Santa Ana was also part of LR 174, after a short concurrency of LR 2 and LR 174 in Anaheim. LR 2 used those two streets through Orange, but US 101 was moved to LR 174 once it was built, and so that part of LR 174 was never signed as SR 10. The bypassed section of LR 2 became State Route 51 in the 1964 renumbering, but was removed from the state highway system in 1965.[5]

By 1942, the piece of SR 10 east of State Route 19 (Lakewood Boulevard) had been designated U.S. Route 101 Bypass.[6] U.S. Route 101 moved to the present Interstate 5 alignment, formerly US 101 Bypass, by 1959, and SR 10 was truncated to the present I-5/Firestone Boulevard junction.[7]

State Route 10

LocationInglewood - Norwalk

Around 1960, SR 10 was renumbered to State Route 42 due to the nearby Interstate 10 (numbered in 1957).[3] This change, which would have normally happened in the 1964 renumbering, was done early due to the closeness of I-10. Route 42 was legislatively defined in that renumbering, running not only from SR 1 to I-5, but beyond to State Route 91 in Anaheim Hills. This route split from the existing SR 42 in Norwalk and ran east along unbuilt pre-1964 Legislative Route 176 to the intersection of State Route 39 (Beach Boulevard) and Imperial Highway. East of SR 39, Imperial Highway was state-maintained, and carried pre-1964 LR 176 and post-1964 SR 42 to its end at SR 91.[8] The whole route, from SR 1 to SR 91, had been added to the California Freeway and Expressway System in 1959.[9][10]

State Route 105

LocationInglewood - Norwalk

In 1965, the unbuilt part from Interstate 605 east to SR 39 was transferred to State Route 90, which had been defined in 1964 to end at I-605; this left a gap in SR 42. The part of SR 42 west of I-605 was added to the Interstate Highway System as Interstate 105 in March 1968,[11] and the legislative changes were made that year - that piece became Route 105, and the piece east of SR 39 became a further extension of SR 90.[3]

Despite being officially Route 105 since 1968, the route continued to be signed as SR 42, not only along its defined alignment from SR 1 to I-605, but past I-605 to Interstate 5 (which had loosely become part of SR 90 in 1965).[12]

Interstate 105 was constructed from 1982 to 1994.[9] Even after the new route was finished, the old route continued to be signed as SR 42, even after the last section was relinquished in mid-2000.[3] Some signs still remained in 2004.[13] Since the widening of Interstate 5 between Interstate 605 and the Los Angeles-Orange County line, Firestone Boulevard does not connect with it anymore, instead ending at Bloomfield Avenue. Access to Firestone Boulevard from I-5 is now via Rosecrans Avenue.[14]

Major intersections

Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, based on the alignment that existed at the time, and do not necessarily reflect current mileage. R reflects a realignment in the route since then, M indicates a second realignment, L refers to an overlap due to a correction or change, and T indicates postmiles classified as temporary (for a full list of prefixes, see California postmile § Official postmile definitions).[16] Segments that remain unconstructed or have been relinquished to local control may be omitted. The entire route was in Los Angeles County.

Los Angeles0.00Manchester AvenueContinuation beyond SR 1
0.00 SR 1 (Lincoln Boulevard)West end of SR 42
1.32Sepulveda Boulevard
InglewoodLa Cienega Boulevard
2.91 I-405 (San Diego Freeway)Interchange
3.83La Brea AvenueFormer SR 107
5.42Crenshaw Boulevard
Los Angeles6.42Western AvenueFormer SR 213
7.42Vermont Avenue
7.93Figueroa Street
8.04 I-110 (Harbor Freeway) – Los Angeles, San PedroInterchange
9.44Central Avenue
Los Angeles10.97Alameda StreetFormer SR 47
South Gate11.61Long Beach Boulevard
14.53 I-710 (Long Beach Freeway) – Pasadena, Long BeachInterchange
14.81Garfield Avenue
Downey17.45 SR 19 (Lakewood Boulevard) – Long Beach, Pasadena
Norwalk18.82 I-605 (San Gabriel River Freeway)Interchange
Imperial HighwayFormer SR 90

I-5 south (Santa Ana Freeway) – Santa Ana
Interchange; eastbound exit and westbound entrance; east end of SR 42. The entrance and exit were permanently closed in 2013 with the widening of Interstate 5. Motorists are redirected south on Bloomfield Avenue and east on Rosecrans Avenue.
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ Google (September 25, 2023). "Overview map of former SR 42" (Map). Google Maps. Google. Retrieved September 25, 2023.
  2. ^ a b California Department of Transportation (July 2007). "Log of Bridges on State Highways". Sacramento: California Department of Transportation.
  3. ^ a b c d California Highways: Former State Route 42
  4. ^ California Highways: Legislative Route 174
  5. ^ California Highways: Unsigned State Route 51
  6. ^ 1942 Gousha Los Angeles and vicinity map Archived 2006-04-24 at the Wayback Machine
  7. ^ 1955 Gousha Los Angeles district map Archived July 26, 2011, at the Wayback Machine
  8. ^ District VII State Highway Numbering Map, September 20, 1963
  9. ^ a b California Highways: Interstate 105
  10. ^ California Highways: State Route 90
  11. ^ California Highways: Interstate Highway Types and the History of California's Interstates
  12. ^ "October 21, 2000 photo of signage on Interstate 5 north at former SR 42". Archived from the original on November 5, 2005. Retrieved March 23, 2006.
  13. ^ "July 6, 2004 photo of signage on Interstate 710 south approaching Firestone Boulevard". Archived from the original on September 29, 2007. Retrieved March 23, 2006.
  14. ^ Upton, Kim (March 3, 2013). "Firestone Boulevard Ramps Will Close Permanently, plus Other Closures and Work on the I-5 South". TheSource. Retrieved April 11, 2018.
  15. ^ California Department of Transportation, All Traffic Volumes on CSHS, 1996
  16. ^ California Department of Transportation. "State Truck Route List". Sacramento: California Department of Transportation. Archived from the original (XLS file) on June 30, 2015. Retrieved June 30, 2015.

External links