This highway was the principal highway between Virginia City and
Carson City and has been in use since the
Comstock Lode of the 1860s. The highway has appeared on Nevada highway maps since at least as far back as 1919 and was first numbered part of Nevada State Route 17 (modern
State Route 341) sometime in the 1920s. The 1937 edition of the official Nevada Highway Map was the first to show both routes between Virginia City and Silver City, with both routes numbered 17. The 1949 edition showed separate numbers for the two routes, with the older route now numbered 80. It retained the 80 designation at least to 1979, before being renumbered route 342. In 2015, the highway was closed for about 5 months after heavy rains caused the roadway to sink into a shaft of an nearby abandoned silver mine. The highway was rebuilt on a new alignment to pass the mine shaft to the East and the cap over the mine rebuilt. The collapsed mine also forced
AT&T to relocate a number of telephone lines in the area. ==Major intersections==