branch of the trail called Hastings Cutoff. The cutoff rejoins the main route of the trail in the Humboldt River canyon. Through this portion of Nevada, the main route of the California Trail ran north of modern SR 233. From Elko west to Lovelock, I-80 faithfully follows the California Trail. West of Lovelock, in the middle of the Humboldt Sink, the California Trail again splits into two branches. These branches, the Carson River route and the Truckee River route, are named for the waterways that guide each branch up the Sierra Nevada. I-80 follows the Truckee route, the Carson route is approximated by US 95, US 50, US 395, and SR 88/California State Route 88. Transcontinental railroads The route of modern I-80 was also previously used for the construction of two transcontinental railroads. The first transcontinental railroad, completed in 1869, closely follows the main line of the California Trail and I-80 west of Wells. The Feather River Route was constructed in 1909 and generally follows the Hastings Cutoff through Eastern Nevada. It also runs parallel to I-80 in Nevada east of Winnemucca. Highways The first paved road across this portion of Nevada was the Victory Highway, designated in Nevada as SR 1. With the formation of the US Numbered Highway System, this route was numbered US 40. From the formation of the Interstate Highway System, the highway was gradually upgraded to Interstate Highway standards and signed as I-80. In 1974, officials in Utah initiated meetings with officials in Nevada and California to truncate the route of US 91. By that time, US 91 was mostly redundant with I-15. Nevada officials agreed and further suggested that both US 91 and US 40 be truncated. Nevada officials recommended the changes occur in 1975, when the last Nevada piece of I-15 was expected to be completed. The 1976 edition of the official highway map for Nevada was the first not showing the US 40 designation. Even though the US Route designation was removed, the freeway was not yet completed. The last piece of I-80 in Nevada to be finished was the Lovelock bypass which started construction in 1981. The 1982 Official Nevada Highway Map was the first to note I-80 as a contiguous freeway across the state. All of the business loops for I-80 in Nevada use the historical route of US 40. I-80 is also known in Nevada as the Dwight D.