California State Route 16

State Route 16 (SR 16) is a state highway in the northern region of the U.S. state of California that runs from Route 20 in Colusa County to Route 49 just outside Plymouth in Amador County, primarily crossing the Sacramento Valley. Much of the route through the Sacramento area is unsigned as it runs on a concurrency with the I-5 and US 50 freeways.

"CA 16" redirects here. For the congressional district, see California's 16th congressional district.

State Route 16
The signed portion of SR 16 highlighted in red
Route information
Defined by Streets and Highways Code § 316
Maintained by Caltrans
Length111.17 mi[1] (178.91 km)
(includes 28.82 mi (46.38 km) on I-5 and US 50)
Existed1934[2]–present
Section 1
West end SR 20 near Rumsey
Major
junctions
East end I-5 in Woodland
Section 2
West end US 50 in Sacramento
Major
junctions
East end SR 49 near Drytown
Location
CountiesColusa, Yolo, Sacramento, Amador
Highway system
← SR 15→ SR 17

Route description

SR 16 is part of the California Freeway and Expressway System,[3] but is not part of the National Highway System,[4] a network of highways that are considered essential to the country's economy, defense, and mobility by the Federal Highway Administration.[5] SR 16 is eligible to be included in the State Scenic Highway System,[6] but it is not officially designated as a scenic highway by the California Department of Transportation.[7] It is known as the Stanley L. Van Vleck Memorial Highway from Dillard Road in Sacramento County to the Amador County line, honoring a former prominent leader in the state's agricultural organizations.[8]

State Route 16 begins in Colusa County near Wilbur Springs at the junction with State Route 20. SR 16 goes south alongside Bear Creek, which enters a narrow canyon and joins with Cache Creek near the Yolo County line. SR 16 continues in the canyon, running close to the river, passing Cache Creek Canyon Regional Park, and emerging from the canyon north of Rumsey. This section is so prone to rock slides that there are permanent gates at each end.

SR 16 continues to parallel Cache Creek, at a greater distance, going south-east through Capay Valley, with Blue Ridge to its west and the Capay Hills (including Bald Mountain) to its east. It goes through Rumsey, Guinda, Brooks, Cache Creek Casino Resort, Capay, Esparto (intersecting with County Route E4 to Dunnigan), and Madison.

East of Madison, and now in the Central Valley, SR 16 interchanges with Interstate 505 before heading east toward Woodland. In west Woodland it merges with County Road 22 and then turns north, concurrently with County Route E7 and Interstate 5 Business, until it meets its interchange with Interstate 5.[9]

SR 16 then runs on I-5 from Woodland towards Sacramento in an unsigned concurrency. At the junction with US 50 in the southeastern part of Downtown Sacramento, SR 16 turns eastward on an unsigned concurrency with US 50. It then diverges from US 50 via Howe Ave., goes southward on Howe Ave. for a short distance, then runs eastbound on Folsom Blvd. SR then peels off from Folsom Blvd. less than a mile later as Jackson Road

SR 16 then heads east through Perkins. After it passes near Bridge House and Rancho Murieta, where it crosses the Cosumnes River, SR 16 enters Amador County. SR 16 then ascends into the Sierra Nevada foothills, leaving the Central Valley. In Amador County, SR 16 passes near Forest Home before intersecting with State Route 124 and terminating at State Route 49.[9]

History
SR 16 heading east through Yolo County, California.

The two ends of SR 16 were added to the state highway system by the third bond issue, passed by the state's voters in 1919: Route 50 from Lower Lake east to Rumsey and Route 54 from the Sacramento-Amador County line east to Drytown.[10] Each was connected to Sacramento by existing or planned paved county highways.[11] Although the exact alignment of Route 50 was not specified, the state Department of Engineering had already surveyed a 35-mile (56 km) route through Cache Creek Canyon pursuant to a 1915 law, which defined the Yolo and Lake Highway "following generally, the meanderings of Cache creek" but did not make it a state highway.[12][13] By 1924, the California Highway Commission's engineers had realized that building Route 50 through the canyon was impractical, and adopted a substitute plan for two highways connecting Lower Lake and Rumsey with the planned Route 15 (Tahoe-Ukiah Highway, now State Route 20) to the north[14] in September 1925.[15][16] The western connection, to Lower Lake, became part of Route 49 (now State Route 53 there), which continued south from Lower Lake to Calistoga.

Each route was extended to Sacramento in 1933 over the aforementioned county highways, taking Route 50 southeast from Rumsey to Woodland near Cache Creek and then alongside the Sacramento River to the I Street Bridge, and Route 54 west from the county line to Route 11 just outside Sacramento.[17][18] The entirety of both routes, from SR 20 near Wilbur Springs through Sacramento to State Route 49 just north of Drytown (and initially overlapping SR 49 to Jackson), was included in the initial state sign route system in 1934 as Sign Route 16.[2] Through downtown Sacramento, SR 16 followed U.S. 40 (Legislative Route 6) and U.S. 50 (Legislative Route 11), mostly on Capitol Avenue, while Legislative Route 50 continued south on 5th Street (later a one-way pair of 3rd and 5th Streets) and turned east on Broadway, carrying Sign Route 24 most of the way to Freeport Boulevard.[19][20] In the 1964 renumbering, Route 16 became the new legislative designation,[21] and Sign Route 24 through Sacramento was replaced with State Route 99 and State Route 160. As neither of these used what had been Sign Route 24 along 3rd and 5th Streets and Broadway, part of Route 16's new definition ("Route 5 near Woodland to Sacramento") was used for several years on this alignment until it became part of State Route 99 later that decade. This left the western segment of SR 16 ending at Interstate 5 near the east end of the I Street Bridge[22] until 1984, when the Woodland-Sacramento portion, which had become redundant with the parallel Interstate 5 complete, was deleted from the legislative definition.[23] After this, SR 16 was rerouted from the intersection with County Route E7 to continue north on a bypass of Woodland instead of east to Interstate 5.[9]

On September 15, 2014, Assembly Bill No. 1957 was passed, authorizing relinquishment of the segment of SR 16 in Eastern Sacramento near US 50.[24]

Major intersections

Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, based on the alignment that existed at the time, and do not necessarily reflect current mileage. R reflects a realignment in the route since then, M indicates a second realignment, L refers an overlap due to a correction or change, and T indicates postmiles classified as temporary (for a full list of prefixes, see the list of postmile definitions).[25] Segments that remain unconstructed or have been relinquished to local control may be omitted. The numbers reset at county lines; the start and end postmiles in each county are given in the county column.

CountyLocationPostmile
[25][1][26]		DestinationsNotes
Colusa
COL 0.00-7.26		​0.00 SR 20 – Williams, Clearlake, UkiahWest end of SR 16
Yolo
YOL 0.00-R43.42		Capay​ CR E4 (Road 85) – Dunnigan
​32.23 I-505 – Redding, VacavilleInterchange
WoodlandR40.57 I-5 BL south (West Main Street) / CR E7 (Road 98)West end of I-5 Bus. overlap; West Main Street was former SR 16 east
​R43.42 I-5 / Road 18 – Redding, SacramentoInterchange; east end of western section of SR 16; east end of I-5 Bus. overlap
Gap in route
Sacramento
SAC T1.66-R23.96		SacramentoT1.66 US 50 (El Dorado Freeway) / Howe Avenue – South Lake Tahoe, SacramentoInterchange; west end of eastern section of SR 16
T1.95Folsom Boulevard west, Power Inn RoadFormer SR 16 west / US 50 west
T2.53Folsom Boulevard east, Notre Dame DriveFormer US 50 east
Rancho CordovaR11.47 CR E2 (Sunrise Boulevard)
Amador
AMA R0.00-9.37		​9.09 SR 124 – Ione
​9.37 SR 49 – Plymouth, Placerville, Sutter Creek, JacksonEast end of SR 16
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also
  •  California Roads portal

References
  1. California Department of Transportation (July 2007). "Log of Bridges on State Highways". Sacramento: California Department of Transportation.
  2. 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.
  3. "Article 2 of Chapter 2 of Division 1". California Streets and Highways Code. Sacramento: California Office of Legislative Counsel. Retrieved February 6, 2019.
  4. Federal Highway Administration (March 25, 2015). National Highway System: California (North) (PDF) (Map). Scale not given. Washington, DC: Federal Highway Administration. Retrieved October 19, 2017.
  5. 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.
  6. "Article 2.5 of Chapter 2 of Division 1". California Streets & Highways Code. Sacramento: California Office of Legislative Counsel. Retrieved February 6, 2019.
  7. California Department of Transportation (August 2019). "Officially Designated State Scenic Highways and Historic Parkways" (XLSX). Sacramento: California Department of Transportation. Retrieved October 19, 2017.
  8. California Department of Transportation; California State Transportation Agency (January 2015). 2014 Named Freeways, Highways, Structures and Other Appurtenances in California. Sacramento: California Department of Transportation. pp. 43, 295. Archived from the original (PDF) on May 30, 2015. Retrieved May 30, 2015.
  9. Google (October 19, 2017). "California State Route 16" (Map). Google Maps. Google. Retrieved October 19, 2017.
  10. California State Assembly. "Senate Constitutional Amendment No. 27—Resolution to propose to the people of the State of California an amendment to the constitution of said state, by adding to article sixteen thereof a new section to be numbered two, providing for the..." Forty-third Session of the Legislature. Statutes of California (Resolution). State of California. Ch. 46 p. 1520.: "Rumsey to Lower Lake"; "county line near Michigan Bar via Huot's ranch to Drytown"
  11. Ben Blow, California Highways: A Descriptive Record of Road Development by the State and by Such Counties as Have Paved Highways, 1920 (Archive.org or Internet Archive), pp. 115-116, 206-207, 284-285
  12. Department of Engineering, Fifth Biennial Report of the Department of Engineering of the State of California, December 1, 1914, to November 30, 1916, 1917, pp. 185-186
  13. California State Assembly. "An act to establish the Yolo and Lake highway; to define its course; to provide for its location and survey; and to make an appropriation therefor". Forty-first Session of the Legislature. Statutes of California. State of California. Ch. 283 p. 478.
  14. California Highway Advisory Committee and Arthur Hastings Breed, Report of a Study of the State Highway System of California, California State Printing Office, 1925, p. 91
  15. Oakland Tribune, Highway Commission Lays Plans for Building Lake Connection, September 6, 1925
  16. Fresno Bee, Route Follows Lake Shore, September 27, 1925
  17. 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. 2035.: "State Highway Route 50 near Rumsey to State Highway Route 7 near Woodland." "Woodland to Sacramento." "State Highway Route 11 near Perkins to State Highway Route 54 near Michigan Bar."
  18. 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. 278-279.: "Route 50 is from Route 15 to Sacramento via Rumsey and Woodland." "Route 54 is from Route 11 near Perkins to Drytown, passing near Michigan Bar and via Huot's Ranch."
  19. Division of Highways, Sacramento, 1944
  20. Division of Highways, Sacramento, 1963
  21. 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.: "Route 16 is from: (a) Route 20 to Route 5 near Woodland via Rumsey and Woodland. (b) Route 5 near Woodland to Sacramento. (c) Route 50 near Perkins to Route 49 near Drytown."
  22. Division of Highways, Annual Traffic Census: 1964, 1966, 1968
  23. California State Assembly. "An act...relating to state highways". 1983–1984 Session of the Legislature. Statutes of California. State of California. Ch. 409 p. 1770.
  24. California State Assembly. "An act to amend Section 316 of the Streets and Highways Code, relating to state highways". State of California. 2014 Session of the Legislature.
  25. California Department of Transportation. "State Truck Route List". Sacramento: California Department of Transportation. Archived from the original (XLS file) on June 30, 2015. Retrieved June 30, 2015.
  26. California Department of Transportation, All Traffic Volumes on CSHS, 2005 and 2006

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