[2] SR 789 parallels I-80 in its southeasterly direction for over two miles (3.2 km) before turning sharply to the northeast.

The route passes through Emigrant Canyon, briefly paralleling the Humboldt River on its trek northward.

[6] By 1963, construction of future Interstate 80 reached the Golconda area, bypassing the original US 40 route.

[7] State Route 18 remained unchanged for several years after gaining mileage at its west end.

However, the route ended up being altered in the 1976 renumbering of Nevada's state highway system that began on July 1, 1976.