California State Route 12
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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 (SR 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).
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[edit] Route description
State Route 12 is part of the California Freeway and Expressway System[3] and is eligible for the State Scenic Highway System[4]. However, it is only designated as a scenic highway from its intersecton with Danielli Avenue east of Santa Rosa to its junction with London Way near Aqua Caliente.[5] SR 12 has been designated by various state laws as the Luther Burbank Memorial Highway from Santa Rosa to Sebastopol (after botanist Luther Burbank),[6] and as Valley of the Moon Scenic Route.[citation needed] SR 12 is also known as Rio Vista Highway from Interstate 80 to Route 160 east of Rio Vista,[7][8] and as Blood Alley from Lodi to Fairfield.[9]
SR 12 overlaps with Interstate 80 (I-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. Route 101 (US 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.
SR 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.
[edit] 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.[10]
In 1976, the discontinuity resulting from the concurrency with State Route 84 was removed.[10]
[edit] 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.
[edit] 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 [11][12][13] |
#[14] | 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 | |||
| 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 | |||||
| 20.10 | Calistoga Road – Calistoga | ||||
| Kenwood | 27.03 | Warm Springs Road | |||
| 30.07 | Trinity Road – Oakville | ||||
| 30.65 | Arnold Drive – Glen Ellen | ||||
| Sonoma | 38.69 | Napa Road, Leveroni Road – Petaluma | |||
| Schellville | 41.36 7.44[N 1] |
 SR 121 south (Fremont Drive) – Petaluma, San Francisco |
West end of SR 121 overlap | ||
| R10.79[N 1] | Napa Road | ||||
| Napa NAP 0.00-3.31 |
Napa | R4.47[N 1] R8.66[N 2] |
SR 29 north / SR 121 north – Napa, Calistoga |
East end of SR 121 overlap; west end of SR 29 overlap | |
| R6.20[N 2] |  SR 221 / Soscol Ferry Road – Downtown Napa, Lake Berryessa |
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| 4.71 0.00[N 2] |
SR 29 south / Airport Boulevard – Vallejo, Napa County Airport |
East end of SR 29 overlap | |||
| Solano SOL 0.00-26.41 |
West end of freeway on I-80 | ||||
| Fairfield | R2.79 R11.98[N 3] |
I-80 west – San Francisco |
West end of I-80 overlap; westbound exit and eastbound entrance | ||
| 12.74[N 3] | 40 | Green Valley Road | Eastbound exit and entrance; westbound entrance | ||
| 12.84[N 3] | 40 |  I-680 south – Benicia, Martinez, San Jose |
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| 13.49[N 3] | 41 | Suisun Valley Road, Pittman Road | |||
| 15.82[N 3] L1.80 |
I-80 east – Sacramento |
East end of I-80 overlap; eastbound exit and westbound entrance | |||
| L2.22 | 56 | .svg){kind=small} Chadbourne Road to I-80 east – Fairfield Auto Mall, Sacramento |
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| East end of freeway | |||||
| 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 | ||||
| Walters Road | |||||
| 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 | ||
| Sacramento SAC 0.00-6.20 |
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 | ||
| 10.30 |  CR J8 north (Thornton Road) / Star Street |
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| Lodi | 15.16 |  CR J10 (Lower Sacramento Road) |
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| 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 29.50[N 4] |
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 | |||||
| 30.97[N 4] 18.08 |
SR 99 north / Victor Road – Sacramento |
Interchange; east end of SR 99 overlap | |||
| L23.29 L12.24[N 5] |
 SR 88 west – Stockton |
West end of SR 88 overlap | |||
| Lockeford | 14.08[N 5] |  CR J5 (Elliott Road, Tully Road) |
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| Clements | 19.17[N 5] 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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- ^ a b c Indicates that the postmile represents the distance along SR 121 rather than SR 12.
- ^ a b c Indicates that the postmile represents the distance along SR 29 rather than SR 12.
- ^ a b c d e Indicates that the postmile represents the distance along I-80 rather than SR 12.
- ^ a b Indicates that the postmile represents the distance along SR 99 rather than SR 12.
- ^ a b c Indicates that the postmile represents the distance along SR 88 rather than SR 12.
[edit] 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)
- ^ California Department of Transportation, Officially Designated Scenic Highways, accessed 2010-01-03
- ^ 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.
- ^ 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.
- ^ 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.
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