Carson City Freeway

Interstate 580
Route information
Maintained by NDOT
Length:	30.090 mi (48.425 km)
Existed:	October 27, 1978 – present
History:	Number approved on October 27, 1978; constructed in phases 1964–2012; signed in 2012
Major junctions
South end:	US 50 / US 395 in Carson City
	US 395 Bus. in Carson City SR 431 in Reno US 395 Bus. in Reno
North end:	I‑80 / US 395 in Reno
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future Highways in Nevada Interstate U.S. State pre-1976 Scenic ← SR 579 SR 582 →

Interstate 580 (I-580) is an Interstate Highway in northwestern Nevada. It runs concurrently with U.S. Highway 395 (US 395) from I-80 in Reno, to the east leg of US 50 in Carson City. Although the freeway has existed in Reno with the I-580 designation since the 1970s, the Interstate was signed only as US 395 until the portion between Reno and Carson City was completed in 2012. I-580 is not complete; the highway is expected to be signed between the east and west legs of US 50 in Carson City in August 2017 with the extension of the freeway to its final terminus. However the final phase, a grade separation at the interchange at the southern end, has been postponed with no scheduled completion date.

I-580 is still under development. The freeway exists today from I-80 near downtown Reno south to Fairview Drive in Carson City. Eventually, the highway will continue in a southerly direction from Fairview Drive to terminate at the junction of US 395 and US 50 just south of Carson City. Fairview Drive is being temporarily used as a connector to Carson Street and US 395.

The constructed portion begins at Fairview Drive along the eastern edge of Eagle Valley, where most of the population of Carson City lives. The highway loosely follows the former alignments of Edmonds Drive and Lompa Lane along the eastern half of the city, which were relocated or truncated to make room for the freeway.

...
Wikipedia