Interstate 380 (California)

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.

Interstate 380

Interstate 380 may refer to:

Interstate 380 (Pennsylvania)

Interstate 380 (abbreviated I-380) is a spur highway in northeast Pennsylvania that connects Interstate 80 with Interstate 81 and Interstate 84. The northern terminus of I-380 is at Interstate 81 at the Throop-Dunmore Interchange in Dunmore; the southern terminus is in Tunkhannock Township at the junction with Interstate 80. The entire length of the highway is 28.2 miles (45.4 km).

Route description

I-380 begins at an interchange with I-80 in the northeastern corner of Tunkhannock Township in Monroe County, heading north as a four-lane freeway. The road soon crosses into Tobyhanna Township and runs through forested areas in the Pocono Mountains with nearby development. The highway comes to an interchange with PA 940 to the west of Pocono Summit. I-380 continues north and crosses into Coolbaugh Township, where it curves northwest and runs through dense forests. The road passes through part of Pennsylvania State Game Lands Number 127 before it comes to a northbound exit and southbound entrance at PA 423 near Tobyhanna. A short distance later, the highway comes to a southbound exit and northbound entrance serving the northern terminus of PA 611. Following this interchange, I-380 passes to the southwest of the Tobyhanna Army Depot before it runs along the border between Pennsylvania State Game Lands Number 127 to the southwest and Gouldsboro State Park to the northeast. Farther northwest, the highway comes to a diamond interchange with the southern termini of PA 435 and PA 507 near Gouldsboro.

Interstate 380 (Iowa)

Interstate 380 (I-380) is a 73-mile (117 km) auxiliary Interstate Highway located in eastern Iowa. The route extends from Interstate 80 near Coralville to Waterloo. I-380 connects the cities of Cedar Rapids and Waterloo, the second- and sixth-largest cities in the state, respectively, to the Interstate Highway System. Except for its last 1 ¹⁄₂ miles (2.4 km) north of U.S. Route 20 (US 20), I-380 runs concurrent with Iowa Highway 27, which represents Iowa's portion of the 560-mile (900 km) Avenue of the Saints Highway connecting St. Louis, Missouri, with St. Paul, Minnesota.

Construction of I-380 took 12 years to complete, ending in 1985. After the interstate opened, US 218 was moved onto the new freeway. In the 1990s, the I-380 corridor was selected as part of the Avenue of the Saints corridor, which Iowa designated as Iowa Highway 27 in 2001. I-380 has been affected by two major floods, the Great Flood of 1993 and the Iowa flood of 2008, both of which closed the road at the Iowa River for two weeks.