Foothill Freeway (English Wikipedia)

"Early California History" (PDF). Los Angeles County Arboretum & Botanic Garden. Archived from the original (PDF) on December 24, 2010. Retrieved September 9, 2009.

arcadia.ca.us (Global: low place; English: low place)

ci.arcadia.ca.us

"Santa Anita Depot" (PDF). Caminos: Newsletter of the Arcadia Historical Society. Arcadia Historical Society. July 2007. p. 5. Archived from the original (PDF) on June 8, 2011. Retrieved September 9, 2009.

ca.gov (Global: 352^nd place; English: 167^th place)

dot.ca.gov

California Department of Transportation. "State Truck Route List". Sacramento: California Department of Transportation. Archived from the original (XLS file) on September 5, 2015. Retrieved June 30, 2015.
California Department of Transportation (August 2019). "Officially Designated State Scenic Highways and Historic Parkways" (XLSX). Sacramento: California Department of Transportation. Retrieved September 15, 2017.
California Department of Transportation; California State Transportation Agency (January 2021). 2020 Named Freeways, Highways, Structures and Other Appurtenances in California (PDF). Sacramento: California Department of Transportation. p. 85. Archived from the original (PDF) on October 10, 2022.
"I-215 North SR 210/215 Connector Project Fact Sheet" (PDF). District 8. California Department of Transportation. Archived from the original (PDF) on November 17, 2009. Retrieved May 3, 2010.
"Route 210 Freeway Interchanges" (PDF). California Numbered Exit Uniform System. California Department of Transportation. March 18, 2020. Retrieved November 24, 2024.

leginfo.legislature.ca.gov

"Section 510". California Streets and Highways Code. Sacramento: California Office of Legislative Counsel. Retrieved August 17, 2025.
"Article 2 of Chapter 2 of Division 1". California Streets and Highways Code. Sacramento: California Office of Legislative Counsel. Retrieved February 6, 2019.
"Article 2.5 of Chapter 2 of Division 1". California Streets & Highways Code. Sacramento: California Office of Legislative Counsel. Retrieved February 6, 2019.
"AB-776 Route 210". California Office of Legislative Counsel. October 8, 2023. Retrieved July 14, 2025.

postmile.dot.ca.gov

"Route 210U: Postmile SBD 15.528 to SBD 20.917". Postmile Services Postmile Query Tool. Caltrans. Retrieved March 20, 2025.

sanbag.ca.gov

"Route 210 to Interstate 215 High-Speed Connectors, San Bernardino". San Bernardino Associated Governments. November 3, 2009. Archived from the original on October 6, 2010. Retrieved October 18, 2010.

cahighways.org (Global: low place; English: low place)

Faigin, Daniel P. (January 12, 2010). "Routes 185–192". California Highways. Daniel P. Faigin. Retrieved May 3, 2010.^{[self-published source]}
Faigin, Daniel P. (January 12, 2010). "Routes 105–112". California Highways. Daniel P. Faigin. Retrieved May 3, 2010.^{[self-published source]}
Faigin, Daniel P. (January 12, 2010). "Routes 25–32". California Highways. Daniel P. Faigin. Retrieved May 3, 2010.^{[self-published source]}

cityofhighland.org (Global: low place; English: low place)

"State Route 210/Victoria Avenue New Interchange Project (EA 0M730)". City of Highland California. July 11, 2023. Retrieved September 7, 2023.

dailybulletin.com (Global: low place; English: 7,551^st place)

"Why isn't the new section of the 210 Freeway called Interstate 210?". Daily Bulletin. September 16, 2018. Retrieved July 2, 2024.

dot.gov (Global: 1,620^th place; English: 841^st place)

fhwa.dot.gov

Federal Highway Administration (March 25, 2015). National Highway System: Los Angeles–Long Beach–Anaheim, CA (PDF) (Map). Scale not given. Washington, DC: Federal Highway Administration. Retrieved September 15, 2017.
Federal Highway Administration (March 25, 2015). National Highway System: Riverside–San Bernardino, CA (PDF) (Map). Scale not given. Washington, DC: Federal Highway Administration. Retrieved September 15, 2017.
"Table 1: Auxiliary Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. January 2025. Retrieved August 17, 2025.
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.

glendora.ca.us (Global: low place; English: low place)

ci.glendora.ca.us

"City Minutes referencing colloquial name" (PDF).^{[permanent dead link]}

redlandscommunitynews.com (Global: low place; English: low place)

Cano, Alejandro (February 21, 2020). "Project to add two more lanes to SR-210 finally ready to start". Redlands News. Retrieved April 17, 2021.

sandimas.net (Global: low place; English: low place)

"Glendora Interchange".{{cite web}}: CS1 maint: deprecated archival service (link)

sbsun.com (Global: low place; English: 6,809^th place)

"210 Freeway project that adds a lane welcomed at Highland ceremony". July 22, 2023.

twitter.com (Global: 43^rd place; English: 43^rd place)

I-215 Project [@215NEWS] (December 23, 2011). "GREAT NEWS! NB #I215/ WB #SR210 Connector now OPEN to commuters! Drive and enjoy!" (Tweet) – via Twitter.
I-215 Project [@215NEWS] (July 23, 2012). "Great news! EB SR-210 to SB I-215 connector and SB Mt. Vernon Ave./27th St. on-ramp are now open!" (Tweet) – via Twitter.

web.archive.org (Global: 1^st place; English: 1^st place)

California Department of Transportation. "State Truck Route List". Sacramento: California Department of Transportation. Archived from the original (XLS file) on September 5, 2015. Retrieved June 30, 2015.
California Department of Transportation (July 2009). "Log of Bridges on State Highways". Sacramento: California Department of Transportation.
California Department of Transportation; California State Transportation Agency (January 2021). 2020 Named Freeways, Highways, Structures and Other Appurtenances in California (PDF). Sacramento: California Department of Transportation. p. 85. Archived from the original (PDF) on October 10, 2022.
"Early California History" (PDF). Los Angeles County Arboretum & Botanic Garden. Archived from the original (PDF) on December 24, 2010. Retrieved September 9, 2009.
"Santa Anita Depot" (PDF). Caminos: Newsletter of the Arcadia Historical Society. Arcadia Historical Society. July 2007. p. 5. Archived from the original (PDF) on June 8, 2011. Retrieved September 9, 2009.
Nitzman, Alex. "Former State Route 30 Business". AARoads. Archived from the original on August 7, 2025. Retrieved November 12, 2025.
"I-215 North SR 210/215 Connector Project Fact Sheet" (PDF). District 8. California Department of Transportation. Archived from the original (PDF) on November 17, 2009. Retrieved May 3, 2010.
"Route 210 to Interstate 215 High-Speed Connectors, San Bernardino". San Bernardino Associated Governments. November 3, 2009. Archived from the original on October 6, 2010. Retrieved October 18, 2010.

Foothill Freeway (English Wikipedia)

aaroads.com (Global: low place; English: low place)

arboretum.org (Global: low place; English: low place)

arcadia.ca.us (Global: low place; English: low place)

ci.arcadia.ca.us

ca.gov (Global: 352nd place; English: 167th place)

dot.ca.gov

leginfo.legislature.ca.gov

postmile.dot.ca.gov

sanbag.ca.gov

cahighways.org (Global: low place; English: low place)

cityofhighland.org (Global: low place; English: low place)

dailybulletin.com (Global: low place; English: 7,551st place)

dot.gov (Global: 1,620th place; English: 841st place)

fhwa.dot.gov

glendora.ca.us (Global: low place; English: low place)

ci.glendora.ca.us

redlandscommunitynews.com (Global: low place; English: low place)

sandimas.net (Global: low place; English: low place)

sbsun.com (Global: low place; English: 6,809th place)

twitter.com (Global: 43rd place; English: 43rd place)

web.archive.org (Global: 1st place; English: 1st place)

ca.gov (Global: 352^nd place; English: 167^th place)

dailybulletin.com (Global: low place; English: 7,551^st place)

dot.gov (Global: 1,620^th place; English: 841^st place)

sbsun.com (Global: low place; English: 6,809^th place)

twitter.com (Global: 43^rd place; English: 43^rd place)

web.archive.org (Global: 1^st place; English: 1^st place)