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| State Route 12 | |||||||||||||
| Defined by S&HC § 312, maintained by Caltrans | |||||||||||||
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| Length: | 140.64 mi[1] (226.34 km) | ||||||||||||
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| Formed: | 1934[2] | ||||||||||||
| West end: |  SR 116 in Sebastopol |
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| Major junctions: |
 US 101 in Santa Rosa SR 29 near Napa I-80 near Fairfield SR 99 in Lodi |
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| East end: |  SR 49 at San Andreas |
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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].
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Route description
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 (6 km) up to approximately the western city limit of the city of Santa Rosa. It has freeway interchanges with U.S. 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.
History
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. 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]
Future
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.
Major intersections
- 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 | Bodega Avenue – Bodega Bay | Continuation beyond SR 116 | |
| 9.12 | SR 116 (Petaluma Avenue, Main Street) – San Francisco, Jenner |
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| Santa Rosa | R12.94 | Fulton Road, Wright Road to Sebastopol Road – Business District | |||
| West end of freeway | |||||
| 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 | ||||
| 20.10 | Calistoga Road – Calistoga | ||||
| Kenwood | 27.03 | Warm Springs Road, Helmick Road – Kenwood | |||
| 30.07 | Trinity Road – Oakville | ||||
| 30.65 | Arnold Drive – Glen Ellen | ||||
| Sonoma | 36.55 | Riverside Drive – El Verano | |||
| 38.69 | Napa Road, Leveroni Road – Petaluma | ||||
| Schellville | 41.36 121 7.44 |
 SR 121 south (Fremont Drive) – Petaluma, San Francisco |
West end of SR 121 overlap | ||
| 121 R10.79 | Napa Road | ||||
| 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 / Soscol Ferry Road – Downtown Napa, Lake Berryessa |
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| 29 4.71 0.00 |
SR 29 south / Airport Boulevard – Vallejo, Napa County Airport |
East end of SR 29 overlap | |||
| Solano SOL 0.00-26.41 |
.svg){kind=small} Red Top Road to I-80 west – San Francisco |
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| West end of freeway on I-80 | |||||
| Fairfield | R2.79 80 R11.98 |
I-80 west – San Francisco |
West end of I-80 overlap; westbound exit and eastbound entrance | ||
| 80 12.74 | 40 | Green Valley Road | Westbound exit is part of exit 41 | ||
| 80 12.84 | 40 |  I-680 south – Benicia, Martinez, San Jose |
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| 80 13.49 | 41 | Suisun Valley Road, Pittman Road | |||
| 80 15.82 L1.80 |
I-80 east – Sacramento |
East end of I-80 overlap; eastbound exit and westbound entrance | |||
| L2.22 | 56 | Chadbourne Road to I-80 east – Fairfield Auto Mall, Sacramento |
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| East end of freeway | |||||
| R3.21 | Beck Avenue | ||||
| R4.07 | Pennsylvania Avenue | ||||
| Suisun City | R4.47 | 58A | Webster Street, Jackson Street – Fairfield | Interchange | |
| R4.57 | 58B | Main Street – Suisun City Business District | Interchange | ||
| 5.76 | Sunset Avenue, Grizzly Island Road | ||||
| Walters Road, Lawler Ranch Parkway – Travis AFB | |||||
| 19.17 |  SR 113 north / Birds Landing Road – Dixon, Birds Landing, Collinsville |
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| Rio Vista | 26.28 |  SR 84 / Front Street – Rio Vista, Ryer Island |
Interchange | ||
| Rio Vista Bridge over Sacramento River | |||||
| Sacramento SAC 0.00-6.20 |
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| 0.57 |  SR 160 (River Road) – Isleton, Sacramento, Antioch |
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| 5.64 | Terminous Road – Isleton | ||||
| San Joaquin SJ 0.00-27.64 |
10.17 |  I-5 – Sacramento, Stockton, Los Angeles |
Interchange | ||
 CR J8 south (Thornton Road) |
West end of CR J8 overlap; no left turn from SR 12 west | ||||
| 10.30 | CR J8 north (Thornton Road) / Star Street |
East end of CR J8 overlap | |||
| Lodi | 15.16 |  CR J10 (Lower Sacramento Road) |
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| 16.44 | Ham Lane | ||||
| 16.93 |  CR J3 (Hutchins Street) |
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| 17.95 |  SR 99 Bus. (Cherokee Lane) – Central District |
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| 18.07 99 29.50 |
SR 99 south / Kettleman Lane – Fresno, Los Angeles |
Interchange; west end of SR 99 overlap | |||
| West end of freeway on SR 99 | |||||
| East end of freeway on SR 99 | |||||
| 99 30.97 18.08 |
SR 99 north / Victor Road – Sacramento |
Interchange; east end of SR 99 overlap | |||
| 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) |
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| Clements | Clements Road – Linden | ||||
| 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 / Laurel Street – Linden |
West end of SR 26 overlap | |
| 13.87 | SR 26 east – Mokelumne Hill |
East end of SR 26 overlap | |||
| 18.20 | SR 49 – Mokelumne Hill, San Andreas |
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Other names
 |
This article is in a list format that may be better presented using prose. You can help by converting this article to prose, if appropriate. Editing help is available. (July 2009) |
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]
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 dubbed Delta and Dawn 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.
References
- ^ January 1, 2006 California Log of Bridges on State Highways
- ^ California Highways: State Route 12
- ^ CA Codes (shc:250-257)
- ^ CA Codes (shc:260-284)
- ^ a b California Highways (www.cahighways.org): Routes 9 through 16
- ^ California Department of Transportation, State Truck Route List (XLS file), accessed February 2008
- ^ California Department of Transportation, Log of Bridges on State Highways, July 2007
- ^ California Department of Transportation, All Traffic Volumes on CSHS, 2005 and 2006
- ^ California Department of Transportation, California Numbered Exit Uniform System, State Route 12 Freeway Interchanges, Interstate 80 Freeway Interchanges, Retrieved on 2009-02-05.
- ^ 2007 Named Freeways, Highways, Structures and Other Appurtenances in California. Caltrans. pp. 122–123. http://www.dot.ca.gov/hq/tsip/hseb/products/Named_Freeways.pdf. Retrieved 2007-03-28.
- ^ STA Projects and Construction: Highway 12 - Jameson Canyon. Solano Transportation Authority. Accessed on 2007-10-01.
- ^ California Highway Patrol: CADWEB Name from CHP traffic reports. Archived on Google cache on 2007-09-24. Accessed on 2007-10-01.
- ^ Google, Inc. Google Maps – map of Route 12 showing Rio Vista Highway name from I-80 to SR 160 [map]. Cartography by Tele Atlas. Retrieved on 2007-10-01.
- ^ Deaths on Highway 12. San Joaquin Record All Eyes on Blood Alley. Recordnet.com. Accessed on 2008-05-12.. http://www.recordnet.com/apps/pbcs.dll/section?Category=A_SPECIAL45.
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