Interstate 680 (California) (English Wikipedia)

"I-680 Contra Costa Express Lanes". www.bayareafastrak.org. CalTrans. Retrieved January 12, 2025.
"I-680 Sunol Express Lanes". www.bayareafastrak.org. CalTrans. Retrieved January 12, 2025.
"Invoices and Penalties". www.bayareafastrak.org. CalTrans. Retrieved January 12, 2025.
"Benicia–Martinez Bridge". www.bayareafastrak.org. CalTrans. Retrieved August 14, 2022.

books.google.com

Howe & Peters, Engineers' Report to California State Automobile Association Covering the Work of the California Highway Commission for the Period 1911-1920, pp. 11-16

ca.gov

clerk.assembly.ca.gov

California State Assembly. "An act to amend sections 2, 3 and 5 and to add two sections to be numbered 6 and 7 to an act entitled 'An act to provide for the acquisition of rights of way for and the construction, maintenance..." Fiftieth Session of the Legislature. Statutes of California. State of California. Ch. 767 p. 2036.: "State Highway Route 75 near Walnut Creek to State Highway Route 5 near Stockton via Antioch." "State Highway Route 75 near Walnut Creek to Livermore-San Jose Mission Road near Scotts Corners." "State Highway Route 5 near Mission San Jose to State Highway Route 5 near Livermore."
California State Assembly. "An act to establish a Streets and Highways Code, thereby consolidating and revising the law relating to public ways and all appurtenances thereto, and to repeal certain acts and parts of acts specified herein". Fifty-first Session of the Legislature. Statutes of California. State of California. Ch. 29 p. 281, 283.: "Route 75 is from: (a) Oakland to Route 5 near Stockton via Walnut Creek and Antioch..." "Route 107 is from: (a) Route 75 near Walnut Creek to Route 108 near Scotts Corners..." "Route 108 is from Route 5 near Mission San Jose to Route 5 near Livermore."
California State Assembly. "An act...relating to State highways". Fifty-first Session of the Legislature. Statutes of California. State of California. Ch. 274 p. 959, 281.: "Route 74 is from a point on Route 8 near the Napa Y to Cordelia via Vallejo and Benicia."
California State Assembly. "An act...relating to state highway routes". 1949 Session of the Legislature. Statutes of California. State of California. Ch. 1467 p. 2555.: "Route 75 is from:...(b) Route (a) above, north of Walnut Creek to Martinez..."
California State Assembly. "An act to amend Section 374 of, and to add Sections 512 and 543 to, the Streets and Highways Code, relating to state highways". Fifty-seventh Session of the Legislature, 1st extraordinary session. Statutes of California. State of California. Ch. 13 p. 3812.: "Route 74 is from:...(b) (a) above near M and East Second Street to East Fifth and C Streets, in Benicia."
California State Assembly. "An act authorizing the acquisition by the Department of Public Works of the ferry system across Carquinez Straits between Benicia and Martinez..." 1953 Session of the Legislature. Statutes of California. State of California. Ch. 1737 p. 3486-3488.: "Route 75 is from:...(b) Route (a) above, north of Walnut Creek to a connection with Route 74 in Benicia." [Note that this law accidentally deleted portion (c) of Route 75; an urgency measure passed at the 1954 1st extraordinary session (chapter 8) corrected this error.]
California State Assembly. "An act to add Section 253 and Article 3 (commencing with Section 300) to Chapter 2 of Division 1 of, and to repeal Section 253 and Article 3 (commencing with Section 300) of Chapter 2 of Division 1 of, the..." 1963 Session of the Legislature. Statutes of California. State of California. Ch. 385 p. 1173, 1189.: "Route 17 is from: (a) Route 1 near Santa Cruz to Route 101 near Story Road. (b) Route 101 near San Jose to Route 680 near Warm Springs. (c) Route 680 near Warm Springs to Route 580 in Oakland..." "Route 680 is from Route 280 in San Jose to Route 80 in Vallejo passing near Warm Springs, Mission San Jose, Scotts Corners and Sunol, and via Walnut Creek and Benicia."
California State Assembly. "An act...relating to state highways". 1965 Session of the Legislature. Statutes of California. State of California. Ch. 1371 p. 3268, 3269.: "Route 262 is from Route 17 to Route 680 near Warm Springs." "Route 680 is from Route 101 near San Jose to Route 80 in Vallejo passing near Warm Springs, Mission San Jose, Scotts Corners and Sunol, and via Walnut Creek and Benicia."
California State Assembly. "An act to amend Sections 253, 307, 317, 322, 334, 342, 347, 349, 361, 363, 372, 373, 374, 379, 384, 390, 407, 408, 443, 455, 470, 486, 514, 517, 548, and 550 of, to add Sections 556, 557, 558, 560..." 1965 Session of the Legislature. Statutes of California. State of California. Ch. 1372 p. 3273.: "Route 17 is from: (a) Route 1 near Santa Cruz to Route 80 in Oakland..."
California State Assembly. "An act to amend Sections 143.2, 186, 253.1, 253.2, 253.4, 253.5, 253.6, 263.1, 263.5, 263.7, 311, 312, 333, 360, 374, 375, 378, 381, 384, 388, 411, 417, 422, 440, 441, 460, 506, 559, 563, 582, and 620 of, to add..." 1975–1976 Session of the Legislature. Statutes of California. State of California. Ch. 1354 p. 6176, 6178.: "Route 680 is from: (a) Route 101 near San Jose to Route 780 at Benicia passing near Warm Springs, Mission San Jose, Scotts Corners, and Sunol, and via Walnut Creek. (b) Route 780 at Benicia to Route 80 near Cordelia." "Route 780 is from Route 680 at Benicia to Route 80 in Vallejo."

dot.ca.gov

California Department of Transportation (August 2019). "Officially Designated State Scenic Highways and Historic Parkways" (XLSX). Sacramento: California Department of Transportation.
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 July 29, 2017.
California Department of Transportation (2012). Scenic Highway Guidelines (PDF). Sacramento: California Department of Transportation. p. 5. Retrieved June 8, 2017.
"High-Occupancy Vehicle (HOV) & Express Lanes Northern California Region" (PDF). HOV_NorCal.pdf. CalTrans. Retrieved June 2, 2016.
California Department of Transportation, State Highway Routes: Selected Information, 1994 with 1995 revisions, pp. 342, 348
"Interstate 680 Freeway Interchanges" (PDF). California Numbered Exit Uniform System. California Department of Transportation. September 7, 2018. Retrieved October 21, 2020.

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.
"Article 2.5 of Chapter 2 of Division 1". California Streets & Highways Code. Sacramento: California Office of Legislative Counsel. Retrieved February 6, 2019.

traffic-counts.dot.ca.gov

California Department of Transportation, All Traffic Volumes on CSHS, 2005 and 2006

danvillesanramon.com

"Southbound I-680 express lane from Martinez to Walnut Creek to begin toll operations Aug. 20". danvillesanramon.com. July 7, 2021.

davidrumsey.com

Rand McNally & Company, San Francisco and Vicinity, 1927

dot.gov

fhwa.dot.gov

"Table 2: Auxiliary Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. December 31, 2021. Retrieved July 12, 2022.
Federal Highway Administration (March 25, 2015). National Highway System: California (North) (PDF) (Map). Scale not given. Washington, DC: Federal Highway Administration. Retrieved July 29, 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.

google.com

"Google Maps". Google Maps. Retrieved April 13, 2018.
"Google Maps". Google Maps. Retrieved April 13, 2018.

performance.gov

permits.performance.gov

"I-680 Northbound Express Lane Completion Project". Retrieved February 29, 2024.
"Interstate 680 Express Lanes from State Route 84 to Alcosta Boulevard Project". Retrieved February 29, 2024.

sfgate.com

Berton, Justin (July 3, 2010). "Governor sorry about flag Caltrans painted over". San Francisco Chronicle. Retrieved July 20, 2012.

web.archive.org

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.
"I-680 Smart Lane". 680expresslane.org. Archived from the original on April 30, 2009. Retrieved January 26, 2013.
"I-680 Sunol Express Lanes". www.bayareafastrak.org. CalTrans. Archived from the original on November 4, 2022.
"Commuters confused about new express lanes coming to I-680". KGO-TV. October 5, 2017. Archived from the original on June 21, 2023.
California Department of Transportation (July 2007). "Log of Bridges on State Highways". Sacramento: California Department of Transportation.

worldcat.org

search.worldcat.org

Dennis, T.H. (August 1934). "State Routes Will Be Numbered and Marked with Distinctive Bear Signs". California Highways and Public Works. 11 (8): 20–21, 32. ISSN 0008-1159 – via Archive.org.