California State Route 12

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State Route 12
Defined by S&HC § 312, maintained by Caltrans
Length: 140.64 mi[1] (226.34 km)
Formed: 1934[2]
West end: SR 116 in Sebastopol
Major
junctions:		 US 101 in Santa Rosa
SR 29 near Napa
I-80 near Fairfield
SR 99 in Lodi
East end: SR 49 at San Andreas
State highways in California (list - pre-1964)
County routes in California (list)
< I-10 SR 13 >
History - Unconstructed - Deleted - Freeway - Scenic
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State Route 12 is a state highway in the U.S. state of California that travels in an east-west direction from Sebastopol in Sonoma County to State Route 49 just north of San Andreas in Calaveras County. It is constructed to freeway standards from the Fulton Road/South Wright Road stoplight in Santa Rosa, to its partial interchange with Farmers Lane (also in Santa Rosa).

This route is part of the California Freeway and Expressway System[3] and is eligible for the State Scenic Highway System[4].

Contents

[edit] Route description

Major cities
Bolded cities are officially-designated control cities for signs

State Route 12 overlaps with Interstate 80 near Fairfield from near I-80's junction (the Cordelia Junction) with Interstate 680, to just southwest of Fairfield near the Budweiser plant. Entering Sonoma Valley it proceeds north through the Sonoma Creek watershed, with a crossing of Calabazas Creek; Route 12 exits the Sonoma Valley with Mount Hood dominating the skyline on the east. Further west State Route 12 crosses Santa Rosa Creek in the eastern part of the city of Santa Rosa. Just east of the Santa Rosa downtown it crosses Brush Creek and makes a ninety degree left turn at Farmers Lane. Proceeding west from Farmers Lane, State Route 12 attains a freeway status for a length of about four miles up to approximately the western city limit of the city of Santa Rosa. It has freeway interchanges with U.S. Route 101 in Santa Rosa, with I-80/I-680 (West) near Fairfield, with I-80 (East) near Fairfield with Interstate 5 outside of Lodi, and with California (former US) State Route 99 in Lodi.

[edit] History

Route 12 between Lodi and Jackson
Route 12 between Lodi and Jackson

Before the 1964 renumbering, this route was signed as Sign Route 12 for most of its length. However, SR 12 was designated as LRN 51 from SR 116 to SR 121 before the 1964 renumbering. Portions of the route from SR 29 to I-80 ran concurrently with State Route 29 or with State Route 37; this was also LRN 8 and a former routing of U.S. Route 40. The portion from I-80 to then-US 99 was designated as LRN 53 in 1919; from US 99 to SR 49, it was designated as LRN 24.[5]

In 1976, the discontinuity resulting from the concurrency with State Route 84 was removed.[5]

[edit] Future aspirations

Plans call for a western extension of its western terminus to State Route 1 near Bodega Bay. Plans also call for Route 12 to be built from Farmers Lane to Melita Road, however this project was delayed due to community opposition. There will be interchanges at Yulupa Avenue, Summerfield Road, Channel Drive and Sonoma Highway.

[edit] Major intersections and exit list

Note: Except where prefixed with a letter, postmiles were measured in 1964, based on the alignment as it existed at that time, and do not necessarily reflect current mileage. The numbers reset at county lines; the start and end postmiles in each county are given in the county column.
County Location Postmile
[6][7][8]		 #[9] Destinations Notes
Sonoma
SON 9.12-41.36		 Sebastopol 9.12 SR 116 – San Francisco, Jenner
R12.94 Fulton Road, Wright Road to Sebastopol Road – Business District
West end of freeway
Santa Rosa R14.45 5 Stony Point Road
R15.30 6 Dutton Avenue
R16.04 7A US 101 – San Francisco, Eureka Signed as exits 7A (south) and 7B (north) westbound
R16.63 7B South E Street – Downtown Santa Rosa Signed as exit 7C westbound
East end of freeway
T17.53 Farmers Lane
41.36
121 7.44		 SR 121 south West end of SR 121 overlap
Napa
NAP 0.00-3.31		 Napa 121 R4.47
29 R8.66		 SR 29 north / SR 121 north – Napa, Calistoga East end of SR 121 overlap; west end of SR 29 overlap
29 R6.20 SR 221 – Downtown Napa, Lake Berryessa
29 4.71
0.00		 SR 29 south – Vallejo East end of SR 29 overlap
Solano
SOL 0.00-26.41		 To I-80 west / Red Top Road – San Francisco
West end of freeway
R2.79
80 R11.98		 I-80 west – San Francisco West end of I-80 overlap; westbound exit and eastbound entrance
See I-80 (exits 39B-43)
Fairfield 80 15.82
L1.80		 I-80 east – Sacramento East end of I-80 overlap; eastbound exit and westbound entrance
L2.22 To I-80 east / Chadbourne Road, Fairfield Auto Mall – Sacramento
East end of freeway
R3.21 Beck Avenue
R4.07 Pennsylvania Avenue
Suisun City R4.47 58A Webster Street, Jackson Street – Fairfield
R4.57 58B Main Street – Suisun City Business District
5.76 Sunset Avenue, Grizzly Island Road
19.17 SR 113 – Dixon
Rio Vista 26.28 SR 84 / Front Street – Rio Vista, Ryer Island Interchange
Rio Vista Bridge over the Sacramento River
Sacramento
SAC 0.00-6.20
0.57 SR 160 (River Road) – Sacramento, Antioch
San Joaquin
SJ 0.00-27.64		 10.17 I-5 – Sacramento, Stockton, Los Angeles Interchange
10.30 CR J8 (Thornton Road)
Lodi 15.16 CR J10 (Lower Sacramento Road)
16.93 CR J3 (Hutchins Street)
17.95 Cherokee Lane (Bus. 99)
18.07
99 29.50		 SR 99 south – Fresno, Los Angeles West end of SR 99 overlap; interchange
99 30.97
18.08		 SR 99 north – Sacramento East end of SR 99 overlap; interchange
L23.29
88 L12.24		 SR 88 west – Stockton West end of SR 88 overlap
Lockeford 88 14.08 CR J5 (Elliott Road, Tully Road)
88 19.17
23.17		 SR 88 east – Jackson East end of SR 88 overlap
Calaveras
CAL 0.00-18.20		 Valley Springs 9.93 SR 26 west West end of SR 26 overlap
13.87 SR 26 east East end of SR 26 overlap
18.20 SR 49

[edit] Other names

Route 12 has the following names, as designated by various state laws:[10]

  • Luther Burbank Memorial Highway: From Santa Rosa to Sebastopol. Named for botanist Luther Burbank.
  • Officer Rick Charles Cromwell Memorial Freeway: From Lower Sacramento Road to Route 99 at the Lodi city limits.
  • Valley of the Moon Scenic Route[citation needed]

Route 12 also has the following names:

  • Jameson Canyon Road: between Route 29 and Interstate 80.[11]
  • Rio Vista Highway: from Interstate 80 to Route 160 east of Rio Vista.[12][13]
  • Blood Alley: stretch of Highway 12 that connects Lodi and Fairfield [14]

[edit] Rio Vista Bridge and the "Wayward Whales"

Highway 12 crosses the Sacramento River at Rio Vista. This stretch of river has twice been the site of much-publicized inland excursions by humpback whales, presumably veering off course while making their annual migrations along the Pacific coast. In 1985 Humphrey the whale swam about as far as the Rio Vista Bridge. In 2007 a humpback mother and calf circled for several days just upstream of the bridge, seemingly reluctant to pass under it again after having spent the previous three or four weeks upriver near Sacramento.

[edit] References

  1. ^ January 1, 2006 California Log of Bridges on State Highways
  2. ^ California Highways: State Route 12
  3. ^ CA Codes (shc:250-257)
  4. ^ CA Codes (shc:260-284)
  5. ^ a b California Highways (www.cahighways.org): Routes 9 through 16
  6. ^ California Department of Transportation, State Truck Route List (XLS file), accessed February 2008
  7. ^ California Department of Transportation, Log of Bridges on State Highways, July 2007
  8. ^ California Department of Transportation, All Traffic Volumes on CSHS, 2005 and 2006
  9. ^ California Department of Transportation, California Numbered Exit Uniform System, SR-12 Eastbound and SR-12 Westbound, accessed February 2008
  10. ^ 2007 Named Freeways, Highways, Structures and Other Appurtenances in California. Caltrans, 122-123. Retrieved on 2007-03-28. 
  11. ^ STA Projects and Construction: Highway 12 - Jameson Canyon. Solano Transportation Authority. Accessed on 2007-10-01.
  12. ^ California Highway Patrol: CADWEB Name from CHP traffic reports. Archived on Google cache on 2007-09-24. Accessed on 2007-10-01.
  13. ^ Google Maps. Map of Route 12 showing Rio Vista Highway name from I-80 to SR 160. Accessed on 2007-10-01.
  14. ^ Deaths on Highway 12. San Joaquin Record All Eyes on Blood Alley. Recordnet.com. Accessed on 2008-05-12..