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 (2012). Scenic Highway Guidelines(PDF). Sacramento: California Department of Transportation. p. 5. Retrieved June 8, 2017.
leginfo.legislature.ca.gov
"Article 2 of Chapter 2 of Division 1". California Streets and Highways Code. Sacramento: California Office of Legislative Counsel. Retrieved February 6, 2019.
Federal Highway Administration (March 25, 2015). National Highway System: California (North)(PDF) (Map). Scale not given. Washington, DC: Federal Highway Administration. Retrieved September 24, 2017.
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.
Payson, H. (September 1939). "Pacheco Pass Realignment Job Completed Abolishing 31 Curves"(PDF). California Highways and Public Works. 17 (9). Sacramento, California, United States: Department of Public Works, State of California: 6–7. Retrieved April 26, 2014.
Skeggs, Jno. (February 1939). "Pacheco Pass Realignment Deletes 31 Curves, Steep Grades"(PDF). California Highways and Public Works. 17 (2). Sacramento, California, United States: Department of Public Works, State of California: 10–12. Retrieved April 26, 2014.
Weavern, R. (July–August 1965). "Pacheco Pass, Route 152 Now Skirts San Luis Reservoir Site"(PDF). California Highways and Public Works. 44 (7–8). Sacramento, California, United States: Department of Public Works, State of California: 2–7. Retrieved April 26, 2014.
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 2007). "Log of Bridges on State Highways". Sacramento: California Department of Transportation.