California State Route 83

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State Route 83

Euclid Avenue
SR 83 highlighted in red, with relinquished portions in pink
Route information
Maintained by Caltrans
Length13.998 mi[1] (22.528 km)
SR 83 between I-10 and SR 210 was Relinquished in 2010 and is no longer included in the route
History1934 as a highway, 1964 for a number [2]
Major junctions
South end SR 71 in Chino Hills
Major intersections SR 60 in Ontario
North end I-10 at Upland - Ontario border (State Maintenance)[3]
CountryUnited States
CountiesSan Bernardino
Highway system
SR 82 SR 84

State Route 83 (SR 83), also or primarily known as Euclid Avenue, is a state highway and city street in the U.S. state of California. Officially, SR 83 runs from the Chino Valley Freeway (State Route 71) in Chino Hills north to the San Bernardino Freeway (Interstate 10) in Upland.[3] Euclid Avenue then continues north through Upland to the unincorporated community of San Antonio Heights.

Euclid Avenue passes through several historic districts. A segment of the road is listed on the National Register of Historic Places.[4]

Route description

Route 83 is a major north–south arterial serving the cities and communities of Western San Bernardino County. Known as Euclid Avenue for its entire 14-mile (23 km) length, the route begins at its southern terminus at the Chino Valley Freeway (State Route 71) and traverses the communities of Chino, Ontario, and Upland before reaching its northern terminus at the San Bernardino Freeway (Interstate 10). Euclid Avenue, as a city street in Upland, and later a county road in unincorporated San Bernardino County, then continues north into the unincorporated community of San Antonio Heights and provides direct access to Mount Baldy.

North of the Pomona Freeway (State Route 60), Route 83 follows an expanded right of way with six lanes of traffic and a 30-foot (9.1 m) wide landscaped median. Through the communities of Ontario, and Upland, the route traverses several designated historic districts, with craftsman homes and civic buildings dating from the late 19th century lining either side of the street. South of the Pomona Freeway (State Route 60), Route 83 assumes the characteristics of a rural highway, narrowing to two lanes while passing through what was traditionally agricultural land.

SR 83 is part of the California Freeway and Expressway System,[5] and is part of the National Highway System,[6] a network of highways that are considered essential to the country's economy, defense, and mobility by the Federal Highway Administration.[7]


The segment of Euclid Avenue from Philadelphia Street in Ontario north to 24th Street in Upland was added to the National Register of Historic Places as a historic district in 2005. The historic district includes a Madonna of the Trail monument, one contributing site, one contributing structure, and three contributing objects over a 203 acres (82 ha).[4]

Originally, SR 83 extended north from I-10 to the Foothill Freeway (State Route 210) in Upland, but the state relinquished that segment and turned it over to local control.[3] There has never been any direct connection from Euclid Avenue to the Foothill Freeway (State Route 210) in Upland. During the planning stages for the construction of the Foothill Freeway through the area, Upland residents (in conjunction with the residents of other communities along the route) successfully petitioned the State and local governments to require Caltrans to construct the new freeway 'below grade', i.e. build the road surface of the freeway below the elevation of the surrounding terrain. Furthermore, due to concerns of existing traffic volume, noise, etc. along major thoroughfares, such as Euclid Avenue, many Upland residents who lived along or near Euclid Avenue did not want a fully functional interchange at the junction between the new freeway and the street as it was anticipated that doing so would increase traffic and noise, thereby undermining the aesthetic qualities of the street and negatively affecting the residents' "quality of life". Thus, at the intersection of SR 83 and SR 210, there are no on/offramps or associated improvements like traffic lights - direct access between the highways is not possible. Instead, on both sides of the Euclid Avenue overpass there are two wide landscaped areas that provide a visual (and to a lesser extent, acoustic) buffer between the street and the freeway passing below . The landscaped area also serves to provide continuity with the landscaped segments of the street to the north and south of the intersection.

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).[1] Segments that remain unconstructed or have been relinquished to local control may be omitted. The entire route is in San Bernardino County.

Chino HillsR0.00Butterfield Ranch RoadContinuation beyond SR 71
R0.00 SR 71 (Chino Valley Freeway) – CoronaInterchange; SR 71 exit 4
Ontario7.18 SR 60 (Pomona Freeway) – Riverside, Los AngelesInterchange; SR 60 exit 35
8.88Mission BoulevardRiverside, PomonaFormer US 60
9.46Holt BoulevardFormer US 70 / US 99
OntarioUpland line11.11 I-10 (San Bernardino Freeway) – Los Angeles, San BernardinoInterchange; I-10 exit 51; north end of state maintenance.
Upland11.99Arrow Highway
12.49 SR 66 (Foothill Boulevard)Former US 66
13.4616th Street (Baseline Road)
14.1919th StreetFormer SR 30
14.19Euclid Avenue – Mount BaldyContinuation beyond 19th Street
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ a b c 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.
  2. ^ Los Angeles-Orange County Highway history 1930s to 1964 growth
  3. ^ a b c "CA Codes (shc:300-635)". Archived from the original on 2014-10-06. Retrieved 2013-10-19.
  4. ^ a b Cite error: Invalid <ref> tag; no text was provided for refs named nris
  5. ^ "Article 2 of Chapter 2 of Division 1". California Streets and Highways Code. Sacramento: California Office of Legislative Counsel. Retrieved February 6, 2019.
  6. ^ Federal Highway Administration (March 25, 2015). National Highway System: Riverside–San Bernardino, CA (PDF) (Map). Scale not given. Washington, DC: Federal Highway Administration. Retrieved October 10, 2017.
  7. ^ Natzke, Stefan; Neathery, Mike & Adderly, Kevin (June 20, 2012). "What is the National Highway System?". National Highway System. Washington, DC: Federal Highway Administration. Retrieved July 1, 2012.
  8. ^ California Department of Transportation (July 2007). "Log of Bridges on State Highways". Sacramento: California Department of Transportation.
  9. ^ California Department of Transportation, All Traffic Volumes on CSHS Archived July 21, 2011, at the Wayback Machine, 2006

External links