Interstate 80 (I-80) is a transcontinental limited-access highway in the United States that runs from downtown San Francisco, California to Teaneck, New Jersey in the New York City Metropolitan Area. The highway was designated in 1956 as one of the original routes of the Interstate Highway system. Its final segment was opened to traffic in 1986. It is the second-longest Interstate Highway in the United States, following Interstate 90. The Interstate runs through many major cities including Oakland, California, Sacramento, California, Salt Lake City, Utah, Omaha, Nebraska, Des Moines, Iowa and Toledo, Ohio, and passes within 10 miles (16 km) of Chicago, Cleveland, Ohio and New York City.

I-80 is the Interstate highway that most closely approximates the route of the historic Lincoln Highway, the first road across America. The highway roughly traces other historically significant travel routes in the Western United States: the Oregon Trail across Wyoming and Nebraska, the California Trail across most of Nevada and California, the first transcontinental airmail route, and except in the Great Salt Lake area, the entire route of the First Transcontinental Railroad. From near Chicago, Illinois east to near Youngstown, Ohio, Interstate 80 is a toll road, containing the majority of both the Indiana Toll Road and the Ohio Turnpike. I-80 runs concurrent with Interstate 90 from near Portage, Indiana to Elyria, Ohio. In Pennsylvania, I-80 is known as the Keystone Shortway, a non-tolled freeway that crosses rural north-central portions of the state on the way to New Jersey and New York City.

Interstate 80 (I-80) traverses the northern portion of the U.S. state of Nevada. The freeway serves the Reno–Sparks metropolitan area, and also goes through the towns of Fernley, Lovelock, Winnemucca, Battle Mountain, Elko, Wells, and West Wendover on its way through the state.

I-80 follows the historical routes of the California Trail, First Transcontinental Railroad, and Feather River Route throughout portions of Nevada. Throughout the entire state I-80 follows the historical routes of the Victory Highway, State Route 1, and U.S. Route 40 (US 40). The freeway corridor follows the paths of the Truckee and Humboldt Rivers. These rivers have been used as a transportation corridor since the California Gold Rush of the 1840s.

Route description

Truckee River

I-80 enters Nevada in the canyon of the Truckee River, paralleling the California Trail and the First Transcontinental Railroad. Upon exiting the canyon the freeway serves the Truckee Meadows, a name for the urban area consisting of Verdi, Reno, and Sparks. The freeway passes north of Downtown Reno in a depressed alignment before intersecting Interstate 580 / U.S. Route 395. The intersection with US 395 is the busiest portion, averaging 122,000 vehicles per day in 2006. The freeway passes through downtown Sparks via a viaduct over the casino floor of John Ascuaga's Nugget Casino Resort. After leaving the Reno/Sparks metropolitan area the freeway resumes following the Truckee River in a canyon to Fernley. Traffic volumes drop to 26,600 vehicles per day by Fernley and continue dropping to 8,400 by the time the freeway reaches the center of the state. The freeway exits the Truckee River corridor near Wadsworth.

Interstate 80 (I-80) is a part of the Interstate Highway System that runs from San Francisco to Teaneck, New Jersey. In Wyoming, the Interstate Highway runs 402.780 miles (648.212 km) from the Utah state line near Evanston east to the Nebraska state line in Pine Bluffs. I-80 connects Cheyenne, Wyoming's capital and largest city, with several smaller cities along the southern tier of Wyoming, including Evanston, Green River, Rock Springs, Rawlins, and Laramie. The highway also connects those cities with Salt Lake City to the west and Omaha to the east. In Cheyenne, I-80 intersects I-25 and has Wyoming's only auxiliary Interstate, I-180. The Interstate runs concurrently with U.S. Route 30 (US 30) for most of their courses in Wyoming. I-80 also has shorter concurrencies with US 189 near Evanston, US 191 near Rock Springs, and US 287 and Wyoming Highway 789 (WYO 789) near Rawlins. The Interstate has business loops through all six cities along its course as well as a loop serving Fort Bridger and Lyman east of Evanston.