Interstate 580 (Nevada)

Interstate 580
Interstate 580
	I-580 highlighted in red
Route information
	Auxiliary route of I-80
	Maintained by NDOT
Length	35.050 mi (56.408 km)
Existed	October 27, 1978–present
History	1978: Route number approved; 1964–2017: Constructed in phases; 2012: I-580 signs installed;
NHS	Entire route
Major junctions
South end	; US 50 / US 395 / US 395 Bus. in Carson City
	US 50 in Carson City
North end	I-80 / US 395 in Reno
Location
Country	United States
State	Nevada
Counties	City of Carson City, Washoe
Highway system
	Interstate Highway System; Main; Auxiliary; Suffixed; Business; Future; Nevada State Highway System; Interstate; US; State; Pre‑1976; Scenic;

Interstate 580 (I-580) is a 35.050-mile (56.408 km) auxiliary Interstate Highway in Western Nevada. It runs concurrently with US Route 395 (US 395) from an intersection with US 50 near the southern boundary of Carson City to the Reno Spaghetti Bowl interchange with I-80 in Reno. The freeway provides a high-speed direct route between Lake Tahoe and Carson City to Reno and I-80.

Construction on a freeway between Carson City and Reno was planned since 1956, but construction did not occur until 1964. The freeway opened in sections, with the final section opening on August 2, 2017. The I-580 designation was approved on October 27, 1978, but the freeway was not signed as such until the portion between Reno and Carson City was completed following the opening of the Galena Creek Bridge in late August 2012.