USA Parkway
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| USA Parkway | ||||
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| Maintained by NDOT | ||||
| Length: | 18.5 mi (29.8 km) | |||
| Major junctions | ||||
| South end: |
 US 50 in Silver Springs
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| North end: |
 I‑80 east of Sparks
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| Location | ||||
| Counties: | Washoe, Storey, Lyon | |||
| Highway system | ||||
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State Route 439 (SR 439) is a four-lane state highway in Lyon, Storey and Washoe Counties in Nevada. Better known as USA Parkway, the route connects U.S. Route 50 (US 50) in Silver Springs to Interstate 80 (I-80) east of Reno–Sparks via the Tahoe Reno Industrial Center (TRIC). The northern portion of USA Parkway was initially constructed by the industrial center's developers; however, the Nevada Department of Transportation (NDOT) agreed to assume control of the road after Tesla announced plans to build its Gigafactory at TRIC in 2014. NDOT opened the extension of SR 439 south to US 50 in Lyon County on September 8, 2017.
SR 439 serves as a four-lane highway connector of I-80 and US 50. The south end is at a roundabout with US 50 west of Silver Springs, near Silver Springs Airport in Lyon County. From there, the road heads northwest into mountainous terrain, providing access to the Tahoe Reno Industrial Center and the Tesla Gigafactory. The highway continues to its end at a modified diamond interchange with I-80 17 miles (27 km) east of Sparks, in Washoe County.
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