State Route 180 (SR 180) is a state highway in the U.S. state of California. It runs through the heart of the San Joaquin Valley from State Route 33 in Mendota through Fresno, and then east towards the Sierra Nevada to Kings Canyon National Park. An unbuilt segment of SR 180 is defined west to Paicines. Nearly the entire stretch from the Kings River crossing to Cedar Grove is eligible for the State Scenic Highway System, and nearly the entire route from Paicines to Cedar Grove is part of the California Freeway and Expressway System. Two segments travel through national parks, so are not state maintained and are thus exceptions to the above: a segment through the General Grant Grove section of Kings Canyon National Park, and the far eastern end of the road inside of Kings Canyon National Park. The freeway through Fresno has the distinction of having the most heavily traveled section of road in the San Joaquin Valley. Major plans include an extension west from Mendota to Interstate 5. Route description The actual western terminus of SR 180 is at SR 33 in Mendota, with an unconstructed portion defined west across Interstate 5 to SR 25 in Paicines, currently signed as County Route J1. (See Future) In Mendota, the route is carried on Oller Street and San Benito Avenue, then travels along Whitesbridge Avenue through Kerman to Fresno. Through Fresno, from Brawley Avenue to DeWolf Avenue, it is a 4-to-10-lane freeway intersecting SR 99 in a 2-level stack, SR 41 in a 4-level stack, and the southern terminus of SR 168; officially, CalTrans considers the freeway SR 180S (supplemental) until the old highway on downtown surface streets is relinquished. SR 180 is a busy commercial route along most of its urban length, being a main street of Mendota, Kerman, Minkler, and Fresno's Squaw Valley, as was the old highway through Fresno. In east Fresno, the Kings Canyon corridor is one of the largest multicultural business districts in the city, together with east Belmont a mile north. The old Fresno "main street" of Broadway has long been torn down for Chuckchansi Park and Fulton Mall parking, but Stanislaus, Tuolumne, and Ventura Streets remain commercially viable, despite having fallen into some neglect over the years. This segment is being redeveloped as part of the Ventura Widening and Downtown Entryway Beautification Project, as well as the preservation or relocation of