Interstate 380 (California)

Interstate 380
Quentin L. Kopp Freeway
Route information
Defined by
Maintained by Caltrans
Length:	1.670 mi (2.688 km)
Existed:	1964 – present
Major junctions
West end:	I-280 in San Bruno
East end:	US 101 in South San Francisco
Location
Counties:	San Mateo
Highway system
Interstate Highway System Main Auxiliary Suffixed Business State highways in California Interstate U.S. State Pre-1964 History Unconstructed Deleted Freeway Scenic ← SR 371 US 395 →

Interstate 380 (I-380) is a short 1.7-mile (2.7 km) east–west spur Interstate Highway in the San Francisco Bay Area of Northern California, connecting Interstate 280 in San Bruno to U.S. Route 101 near the San Francisco International Airport (SFO). The highway primarily consists of only three intersections: I-280, El Camino Real (State Route 82), and U.S. 101. Like nearby I-280, I-380 never connects to Interstate 80, its parent Interstate Highway. However, there is no rule that says that spur routes need to. (Similarly, the spur route Interstate 795 branches off from Interstate 695, a beltway around Baltimore, and is only indirectly linked to Interstate 95.)

I-380 is officially known as the Quentin L. Kopp Freeway, named after the prominent Calif. State Senator from San Mateo County. This highway was previously named the Portola Freeway to honor the eighteenth-century Spanish explorer Gaspar de Portolá, whose expedition in 1769-70 discovered the San Francisco Bay, from a viewpoint on the Sweeney Ridge located between San Bruno and Pacifica.

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Wikipedia