"About Amtrak California". State of California Department of Transportation. 2013. Archived from the original on January 2, 2014. Retrieved December 22, 2013.
Taylor, Mac. "The 2016–17 Budget Transportation Proposals"(PDF). Legislative Analyst's Office. Legislative Analyst's Office of California. Archived(PDF) from the original on October 5, 2016. Retrieved September 21, 2016.
lab.data.ca.gov
"Caltrans Districts". California Open Data Portal. Retrieved April 18, 2026. Kern County remains the only split county in the state, between Districts 6 and 9 respectively
Karner, Alex (June 2013). "Multimodal dreamin': California transportation planning, 1967–77". The Journal of Transport History. 34 (1): 39–56. doi:10.7227/TJTH.34.1.4. S2CID108503981. Available through ProQuest.
Karner, Alex (June 2013). "Multimodal dreamin': California transportation planning, 1967–77". The Journal of Transport History. 34 (1): 39–56. doi:10.7227/TJTH.34.1.4. S2CID108503981. Available through ProQuest.
Taylor, Mac. "The 2016–17 Budget Transportation Proposals"(PDF). Legislative Analyst's Office. Legislative Analyst's Office of California. Archived(PDF) from the original on October 5, 2016. Retrieved September 21, 2016.
"About Amtrak California". State of California Department of Transportation. 2013. Archived from the original on January 2, 2014. Retrieved December 22, 2013.