Most of the route in Utah is part of the National Highway System, including the 120-mile section referenced above as well as the concurrencies with I-15, I-70, and US 50. According to the National Highway Traffic Safety Administration, there were 519 fatal and serious injury crashes between Spanish Fork and Green River (the non-freeway portion of the eastern half of US-6) from 1996–2008, leading the stretch to be considered one of the deadliest roads in the U.S. This half passes over Soldier Summit and the historic railroad hub of Helper. The eastern half of the arch is a busy transportation corridor, with significant parts having 4 or more lanes. The western half of the arch is less traveled and almost entirely two-lane, passing through the Great Basin Desert, Sevier Lake, Delta, Eureka and the Tintic Standard Reduction Mill. US 6 forms an arch-shaped route with Spanish Fork at the apex.

US-6 and US-50 between Nevada border and Delta In 2009, the Utah State Legislature named part of the route the Mike Dmitrich Highway, which generated controversy, as the state of Utah had previously joined with all the other states through which US-6 passes in naming all of US-6 the Grand Army of the Republic highway. Although it is only about 40 miles (64 km) longer than US-50, it serves more populated areas, and in fact follows what had been US-50's routing until it was moved to follow Interstate 70 (I-70) in 1976. Route 6 ( US-6) is an east–west highway through the central part of the U.S. Millard, Juab, Utah, Wasatch, Carbon, Emery, Grand I-70 / US 6 / US 50 towards Grand Junction, CO

Uroute utah.edu