State Route 11 and 12 in California

State Route 11 and 12 in California

State Route 11 in California

Begin Otay Table
End Otay Mesa (MEX)
Length 2.7 mi
Length 4 km
Enrico Fermi Drive

Always Vieva Road

According to a2zdirectory, State Route 11 is a state route and freeway in the U.S. state of California. The highway is located at the border with Mexico south of San Diego and is 4 kilometers long.

Travel directions

At Otay Mesa, State Route 11 begins at an interchange with the South Bay Expressway and State Route 905. The highway first heads east and curves to a new border crossing with Mexico, where it joins the Carretera Federal 2.


State Route 11 was added to the California State Routes network in 1994, and in 1999 to the so-called “California Freeway and Expressway System,” meaning it’s an important high-quality connection. In 2008 a permit was granted for a new border crossing with Mexico.

On December 10, 2013, construction began on the first section, which included an interchange with SR-125 and SR-905, and a connection with Enrico Fermi Drive. This part cost $103 million, much of which went into the interchange. This first section of 2.7 kilometers in length opened to traffic on March 19, 2016. A full interchange with the SR-125 and SR-905 was still missing. In October 2015, the construction of grade-separated connecting roads at the interchange started. In 2017, the connecting road from SR-905 to SR-125 was put into operation. The entire node was commissioned on December 16, 2021.


The entire project will cost more than $700 million, half of it for the actual border crossing and the rest for the new freeway. On October 26, 2015, the groundbreaking ceremony for the construction of the interchange with SR-11, SR-125 and SR-905 was held. In July 2016, a contract was awarded for segment 2 in Otay Mesa. However, the actual border crossing has yet to be constructed. In June 2017, $45 million was made available for the land acquisition of the border crossing. The construction of the last segment started on August 1, 2019, this part is to be opened in mid-2023.

Traffic intensities

In the year of first opening, 6,000 vehicles used State Route 11 daily.

State Route 12 in California

Get started Sevastopol
End San Andreas
Length 141 mi
Length 226 km

Santa Rosa

Fulton Road

5 Stony Point Road

6 Dutton Avenue

7 → San Francisco / Eureka

8 E Street

9 Brookwood Avenue

10 Farmers Lane

Santa Rosa




→ Sacramento

→ San Francisco

Chadbourne Road

Beck Avenue

Pennsylvania Avenue

Jackson Street

Main Street


Rio Vista


→ Stockton / Sacramento



Valley Springs

San Andreas

According to Agooddir, State Route 12 is a state route in the U.S. state of California. The road forms an east-west route through Northern California and the San Joaquin Valley, from Sebastopol via Santa Rosa, Napa, Fairfield and Lodi to San Andreas. The route is in Santa Rosa a short freeway. State Route 12 is 226 kilometers long.

Travel directions

State Route 12 begins in the town of Sevastopol, some distance from the Pacific Ocean. After 5 kilometers you reach the larger town of Santa Rosa and the freeway begins, which leads through the west and past the center of Santa Rosa, and has an interchange with US 101. East of downtown, the highway ends abruptly and traffic has to travel a long stretch through the built-up area of ​​Santa Rosa.

The road is a regular single-lane road and bends to the southeast, and runs between two mountain ridges of 800 meters height. One then reaches the town of Sonoma. The road then turns east and passes south of the city of Napa. At Cordelia, State Route 12 then merges onto Interstate 80 toward Sacramento.

Six miles east, State Route 12 splits off I-80 again and continues along the south side of Fairfield. This is a limited-access highway, with 2×2 lanes and a mix of grade separated connections and traffic lights. East of Fairfield the road becomes a single carriageway and runs north of Suisun Bay. This is a fairly dry area. At Rio Vista, the Sacramento River is crossed by a lift bridge. Then the road leads through the delta of the Sacramento and San Joaquin Rivers. On the east side of this one crosses Interstate 5.

State Route 12 then passes through the town of Lodi, where the road is a 2×2 urban arterial. Then follows a short double numbering with State Route 99, the highway from Stockton to Sacramento. After that, State Route 12 leads through the agricultural northern part of the San Joaquin Valley. The road then gradually runs into the foothills of the Sierra Nevada, this is a somewhat more secondary part. At San Andreas, the road ends at State Route 49.


State Route 12 is a fairly important route, especially on the western part between Sebastopol and Fairfield, but has only been developed to a limited extent to meet higher design requirements. Part of the passage through Santa Rosa has been constructed as a freeway. The highway section was mainly put into use in 1964, a small part east of the center was opened around 1969. The interchange with US 101 dates from 1964.

It was originally planned to extend the freeway further east in Santa Rosa. A room reservation has been made for this. However, due to local opposition, this was never implemented.

Fairfield’s southern bypass was constructed in the period 1984-1987. The bridge over the Sacramento River in Rio Vista was opened in 1944 and expanded in 1960. In 2014, State Route 12 between Napa and I-80 was widened to 2×2 lanes.


Several parts of State Route 12 are congested. On single-lane sections between Sebastopol, Santa Rosa, Sonoma, Napa and I-80, more than 20,000 vehicles per day, sometimes around 30,000 vehicles per day. State Route 12 is not a fast route between these places, but it is often the only logical connection. The places on the route have gradually grown into quite large places without the infrastructure being adapted to this.

Traffic intensities

23,000 vehicles drive daily between Sebastopol and Santa Rosa, rising to 40,000 to 77,000 vehicles on the highway section through Santa Rosa. The part through the east of Santa Rosa has 20,000 to 40,000 vehicles per day. There are 15,000 vehicles between Santa Rosa and Sonoma and 24,000 vehicles between Sonoma and Napa. There are 30,000 vehicles between Napa and I-80.

The section along the south side of Fairfield has 30,000 to 40,000 vehicles per day, dropping to 10,000 vehicles east of Fairfield. 21,000 vehicles cross the bridge over the Sacramento River at Rio Vista, descending to 18,000 vehicles at I-5. This rises again to 32,000 vehicles in Lodi. East of Lodi this drops from 18,000 to 9,000 vehicles and about 6,000 vehicles further to San Andreas.

State Route 12 in California

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