Road Map of the State of California, 1959 (Map). 1:1,411,705. California Department of Public Works. 1959. Los Angeles and Vicinity inset. Archived from the original on August 4, 2023. Retrieved August 3, 2023 – via David Rumsey Map Collection.
Johnson, A. E. (November 10, 1958). "Route Numbering in California". Letter to G. T. McCoy. American Association of State Highway Officials. Retrieved August 3, 2023 – via AASHTO Route Numbering Archive.
Feldman, Paul (November 19, 1991). "Lights out on an era". Los Angeles Times. p. A3. Archived from the original on August 3, 2023. Retrieved August 2, 2023.
O'Brien, M. A. (May 1952). "History of United States Numbered Highways"(PDF). California Highways and Public Works. Vol. 31, no. 5–6. California Department of Public Works. pp. 54–55. Archived(PDF) from the original on August 2, 2023. Retrieved August 1, 2023 – via Metro Transportation Research Library & Archive.
Lynem, Julie (October 12, 2003). "How Highway 101 has changed". The Tribune. San Luis Obispo. p. A15. Archived from the original on July 27, 2023. Retrieved July 26, 2023 – via Newspapers.com.
"Santa Ana Parkway sector opens Today". Los Angeles Times. December 22, 1947. sec. 2, p. 2. Archived from the original on August 4, 2023. Retrieved August 3, 2023 – via Newspapers.com.
Herbert, Ray (December 9, 1968). "San Diego Freeway now reality". Los Angeles Times. sec. 2, p. 7. Archived from the original on August 10, 2023. Retrieved August 3, 2023 – via Newspapers.com.
"Central Freeway Open to Traffic". San Francisco Examiner. April 23, 1959. p. 3. Archived from the original on August 7, 2023. Retrieved August 6, 2023 – via Newspapers.com.
Merriam, Jr., Lawrence C.; Talbot, David G. (1992). "Directory of Oregon State Park Areas". Oregon's Highway Park System, 1921–1989: An Administrative History, Including Historical Overview and Park Directory. Salem, Oregon: Oregon Parks and Recreation Department. OCLC28184451. Archived from the original on July 29, 2023. Retrieved July 28, 2023 – via NPS History Electronic Library & Archive.
Dixon, Chris (April 29, 2005). "A coast less traveled". The New York Times. p. F1. Archived from the original on July 28, 2023. Retrieved July 28, 2023.
"Court to clarify Sign Act provision". California Highways and Public Works. California Department of Public Works. November 1934. p. 26. Archived from the original on August 2, 2023. Retrieved August 2, 2023 – via California Department of Transportation Library Digital Collections.
Remington, W. G. (March–April 1962). "Bayshore Freeway: San Jose to San Francisco is now all full freeway". California Highways and Public Works. Vol. 41, no. 3–4. California Department of Public Works. pp. 5–8. Archived from the original on August 2, 2023. Retrieved August 2, 2023 – via California Department of Transportation Library Digital Collections.
McCoy, Jr., George T. (January–February 1950). "Freeway Unit: New 4-lane divided section is added to Coast Highway". California Highways and Public Works. Vol. 29, no. 1–2. California Department of Public Works. p. 29. Archived from the original on August 3, 2023. Retrieved August 2, 2023 – via California Department of Transportation Library Digital Collections.
Gallagher, J. D. (September 1950). "Chapter XIV: California Highways". California Highways and Public Works. California Department of Public Works. pp. 106–108. Archived from the original on August 3, 2023. Retrieved August 2, 2023 – via California Department of Transportation Library Digital Collections.
Cortelyou, Spencer V. (July–August 1948). "New freeway: East Los Angeles motorists are saved driving time". California Highways and Public Works. Vol. 27, no. 7–8. California Department of Public Works. pp. 1, 15–17. Archived from the original on August 4, 2023. Retrieved August 3, 2023 – via California Department of Transportation Library Digital Collections.
Hetherington, J. D. (July–August 1958). "Irvine–El Toro: New Santa Ana Freeway section completed in Orange County". California Highways and Public Works. Vol. 37, no. 7–8. California Department of Public Works. pp. 23–24. Archived from the original on August 4, 2023. Retrieved August 3, 2023 – via California Department of Transportation Library Digital Collections.
Frischer, Don (May–June 1956). "Tough job: Santa Ana Freeway widening carried out under heavy traffic Conditions". California Highways and Public Works. Vol. 35, no. 5–6. California Department of Public Works. pp. 58–59. Archived from the original on August 4, 2023. Retrieved August 3, 2023 – via California Department of Transportation Library Digital Collections.
"San Diego Freeway: Governor opens new section". California Highways and Public Works. Vol. 36, no. 3–4. California Department of Public Works. March–April 1957. p. 32. Archived from the original on August 4, 2023. Retrieved August 3, 2023 – via California Department of Transportation Library Digital Collections.
"Route renumbering". California Highways and Public Works. Vol. 43, no. 3–4. California Department of Public Works. March–April 1964. pp. 11–13. Archived from the original on August 4, 2023. Retrieved August 3, 2023 – via California Department of Transportation Library Digital Collections.
Booker, B. W. (March–April 1958). "Report from District IV: Pushed toward completion Bay Area freeway network". California Highways and Public Works. Vol. 37, no. 3–4. California Department of Public Works. pp. 4–5. Archived from the original on August 7, 2023. Retrieved August 6, 2023 – via California Department of Transportation Library Digital Collections.
Gratreak, Leesa; Stuart, Patience; Jones, Shoshana; Becker, Anisa (February 2, 2015). Ranzetta, Kirk (ed.). US 101 Coast Highway Historic Context(PDF) (Report). AECOM. p. 22. Archived(PDF) from the original on July 27, 2023. Retrieved July 26, 2023 – via Oregon Department of Transportation.
Washington State Department of Transportation (2014). Washington State Highways, 2014–2015(PDF) (Map). 1:842,000. Olympia: Washington State Department of Transportation. Retrieved July 29, 2023.
Dixon, Chris (April 29, 2005). "A coast less traveled". The New York Times. p. F1. Archived from the original on July 28, 2023. Retrieved July 28, 2023.
Merriam, Jr., Lawrence C.; Talbot, David G. (1992). "Directory of Oregon State Park Areas". Oregon's Highway Park System, 1921–1989: An Administrative History, Including Historical Overview and Park Directory. Salem, Oregon: Oregon Parks and Recreation Department. OCLC28184451. Archived from the original on July 29, 2023. Retrieved July 28, 2023 – via NPS History Electronic Library & Archive.
Gratreak, Leesa; Stuart, Patience; Jones, Shoshana; Becker, Anisa (February 2, 2015). Ranzetta, Kirk (ed.). US 101 Coast Highway Historic Context(PDF) (Report). AECOM. p. 22. Archived(PDF) from the original on July 27, 2023. Retrieved July 26, 2023 – via Oregon Department of Transportation.
O'Brien, M. A. (May 1952). "History of United States Numbered Highways"(PDF). California Highways and Public Works. Vol. 31, no. 5–6. California Department of Public Works. pp. 54–55. Archived(PDF) from the original on August 2, 2023. Retrieved August 1, 2023 – via Metro Transportation Research Library & Archive.
"Court to clarify Sign Act provision". California Highways and Public Works. California Department of Public Works. November 1934. p. 26. Archived from the original on August 2, 2023. Retrieved August 2, 2023 – via California Department of Transportation Library Digital Collections.
Remington, W. G. (March–April 1962). "Bayshore Freeway: San Jose to San Francisco is now all full freeway". California Highways and Public Works. Vol. 41, no. 3–4. California Department of Public Works. pp. 5–8. Archived from the original on August 2, 2023. Retrieved August 2, 2023 – via California Department of Transportation Library Digital Collections.
McCoy, Jr., George T. (January–February 1950). "Freeway Unit: New 4-lane divided section is added to Coast Highway". California Highways and Public Works. Vol. 29, no. 1–2. California Department of Public Works. p. 29. Archived from the original on August 3, 2023. Retrieved August 2, 2023 – via California Department of Transportation Library Digital Collections.
Masters, Nathan (August 15, 2012). "L.A.'s first freeways". KCET. Archived from the original on August 3, 2023. Retrieved August 2, 2023.
Gallagher, J. D. (September 1950). "Chapter XIV: California Highways". California Highways and Public Works. California Department of Public Works. pp. 106–108. Archived from the original on August 3, 2023. Retrieved August 2, 2023 – via California Department of Transportation Library Digital Collections.
Lynem, Julie (October 12, 2003). "How Highway 101 has changed". The Tribune. San Luis Obispo. p. A15. Archived from the original on July 27, 2023. Retrieved July 26, 2023 – via Newspapers.com.
"Santa Ana Parkway sector opens Today". Los Angeles Times. December 22, 1947. sec. 2, p. 2. Archived from the original on August 4, 2023. Retrieved August 3, 2023 – via Newspapers.com.
Cortelyou, Spencer V. (July–August 1948). "New freeway: East Los Angeles motorists are saved driving time". California Highways and Public Works. Vol. 27, no. 7–8. California Department of Public Works. pp. 1, 15–17. Archived from the original on August 4, 2023. Retrieved August 3, 2023 – via California Department of Transportation Library Digital Collections.
Hetherington, J. D. (July–August 1958). "Irvine–El Toro: New Santa Ana Freeway section completed in Orange County". California Highways and Public Works. Vol. 37, no. 7–8. California Department of Public Works. pp. 23–24. Archived from the original on August 4, 2023. Retrieved August 3, 2023 – via California Department of Transportation Library Digital Collections.
Road Map of the State of California, 1959 (Map). 1:1,411,705. California Department of Public Works. 1959. Los Angeles and Vicinity inset. Archived from the original on August 4, 2023. Retrieved August 3, 2023 – via David Rumsey Map Collection.
Frischer, Don (May–June 1956). "Tough job: Santa Ana Freeway widening carried out under heavy traffic Conditions". California Highways and Public Works. Vol. 35, no. 5–6. California Department of Public Works. pp. 58–59. Archived from the original on August 4, 2023. Retrieved August 3, 2023 – via California Department of Transportation Library Digital Collections.
"San Diego Freeway: Governor opens new section". California Highways and Public Works. Vol. 36, no. 3–4. California Department of Public Works. March–April 1957. p. 32. Archived from the original on August 4, 2023. Retrieved August 3, 2023 – via California Department of Transportation Library Digital Collections.
Herbert, Ray (December 9, 1968). "San Diego Freeway now reality". Los Angeles Times. sec. 2, p. 7. Archived from the original on August 10, 2023. Retrieved August 3, 2023 – via Newspapers.com.
"Route renumbering". California Highways and Public Works. Vol. 43, no. 3–4. California Department of Public Works. March–April 1964. pp. 11–13. Archived from the original on August 4, 2023. Retrieved August 3, 2023 – via California Department of Transportation Library Digital Collections.
Booker, B. W. (March–April 1958). "Report from District IV: Pushed toward completion Bay Area freeway network". California Highways and Public Works. Vol. 37, no. 3–4. California Department of Public Works. pp. 4–5. Archived from the original on August 7, 2023. Retrieved August 6, 2023 – via California Department of Transportation Library Digital Collections.
"Central Freeway Open to Traffic". San Francisco Examiner. April 23, 1959. p. 3. Archived from the original on August 7, 2023. Retrieved August 6, 2023 – via Newspapers.com.
Feldman, Paul (November 19, 1991). "Lights out on an era". Los Angeles Times. p. A3. Archived from the original on August 3, 2023. Retrieved August 2, 2023.
Executive Committee (November 12, 1928). "Minutes of Executive Committee"(PDF) (Report). Washington, DC: American Association of State Highway Officials. p. 9. Retrieved August 2, 2023 – via Wikimedia Commons.
Executive Committee (May 28, 1938). "Addendum to Minutes of Executive Committee"(PDF) (Report). Washington, DC: American Association of State Highway Officials. p. 12. Retrieved August 2, 2023 – via Wikimedia Commons.
U.S. Route Numbering Committee (June 19, 1963). "U.S. Route Numbering Committee Agenda"(PDF) (Report). Washington, DC: American Association of State Highway Officials. p. 11. Retrieved August 3, 2023 – via Wikimedia Commons.
Merriam, Jr., Lawrence C.; Talbot, David G. (1992). "Directory of Oregon State Park Areas". Oregon's Highway Park System, 1921–1989: An Administrative History, Including Historical Overview and Park Directory. Salem, Oregon: Oregon Parks and Recreation Department. OCLC28184451. Archived from the original on July 29, 2023. Retrieved July 28, 2023 – via NPS History Electronic Library & Archive.