 interstate 380 (i-380) is a short 1.7-mile (2.7&nbsp;km) east&ndash;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 portolÃ , 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 is part of the california freeway and expressway system. ==route description== i-380 begins at a junction with i-280 in san bruno. this junction is really only partially built, allowing room to build a proposed freeway extension west towards state route 1 (see below). i-380 then travels east through the city of san bruno, intersecting with state route 82, [[el camino real (ca
Interstate_80 Interstate_Highways_in_California Roads_in_San_Mateo_County,_California San_Francisco_Bay_Area_freeways Three-digit_Interstate_Highways