The Sinclair Freeway refers to portions of two contiguous stretches of freeway in

California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...

: *

Interstate 280 (California) Interstate 280 (I-280) is a major north–south auxiliary Interstate Highway in the San Francisco Bay Area of Northern California. It runs from Interstate 680 (California), I-680 and U.S. Route 101 in California, US Route 101 (US ...

between Route 17 and

US 101 U.S. Route 101, or U.S. Highway 101 (US 101), is a north–south United States Numbered Highway that runs through the states of California, Oregon, and Washington, on the West Coast of the United States. It is also known as (The Royal Roa ...

Interstate 680 (California) Interstate 680 (I-680) is a north–south auxiliary Interstate Highway in Northern California. It curves around the eastern cities of the San Francisco Bay Area from San Jose to I-80 at Fairfield, bypassing cities along the eastern shor ...

between

and the

Alameda County Alameda County ( ) is a List of counties in California, county located in the U.S. state of California. As of the 2020 United States Census, 2020 census, the population was 1,682,353, making it the 7th-most populous county in the state and List ...

line The name is after Joseph P. Sinclair who was the District Engineer for District IV of the Division of Highways (now Caltrans) from 1952 to 1964. This stretch of I-280 and I-680 provided San Jose with its first freeway service. The concept for the freeway took shape during the tenure of Joseph Sinclair. It was named by Assembly Concurrent Resolution 104, Chapt. 168 in 1967."Opening Ceremonies Pamphlet--The Sinclair Freeway-Interstate 280--Calif Div. of Highways-District 4"

References

San Francisco Bay Area freeways Named freeways in California {{Roadindex