In 1977, the

Utah State Legislature The Utah State Legislature is the state legislature of the U.S. state of Utah. It is a bicameral body, comprising the Utah House of Representatives, with 75 state representatives, and the Utah Senate, with 29 state senators. There are no term ...

changed its system of how state route numbers were used and assigned. Prior to 1977 Utah used a system where every

U.S. Highway The United States Numbered Highway System (often called U.S. Routes or U.S. Highways) is an integrated network of roads and highways numbered within a nationwide grid in the contiguous United States. As the designation and numbering of these h ...

and

Interstate Highway The Dwight D. Eisenhower National System of Interstate and Defense Highways, commonly known as the Interstate Highway System, or the Eisenhower Interstate System, is a network of controlled-access highways that forms part of the National Hi ...

traversing the state was assigned a different Utah state route number. There were many instances where having different route numbers for signing and legislative purposes could cause confusion. For example, the highway signed

Interstate 15 in Utah Interstate 15 (I-15) runs north–south in the U.S. state of Utah through the southwestern and central portions of the state, passing through most of the state's population centers, including St. George, Utah, St. George and those compris ...

was legislatively defined State Route 1, not route 15. State Route 15 also existed, but was a different route that passed through

Zion National Park Zion National Park is a national park of the United States located in southwestern Utah near the town of Springdale. Located at the junction of the Colorado Plateau, Great Basin, and Mojave Desert regions, the park has a unique geography and a ...

. In 1977, the state changed to a system where all highways would have the same legislative route number as its signed route number. For example, Interstate 15 would also be route 15 for legislative purposes. Many state routes were re-numbered to eliminate instances where a state route used the same number as a

traversing the state. In cases where two or more routes overlapped, only one of the route numbers sharing the same roadbed would be used in the legislative designation. The other routes in the overlap would have a discontinuity in the legislative description. For example, the stretch of highway between Green River and Crescent Junction is legislatively designated only

Interstate 70 Interstate 70 (I-70) is a major east–west Interstate Highway in the United States that runs from Interstate 15, I-15 near Cove Fort, Utah, to Interstate 695 (Maryland), I-695 and Maryland Route 570 (MD 570) in Woodlawn, Baltimo ...

. The other highways using this same pavement,

U.S. Route 6 U.S. Route 6 (US 6) or U.S. Highway 6 (US 6), also called the Grand Army of the Republic Highway, honoring the American Civil War veterans association, is a main route of the United States Numbered Highway System. While it ...

U.S. Route 50 U.S. Route 50 or U.S. Highway 50 (US 50) is a major east–west route of the U.S. Highway system, stretching from Interstate 80 (I-80) in West Sacramento, California, to Maryland Route 528 (MD 528) in Ocean City, Maryland, on the Atlantic ...

and

U.S. Route 191 U.S. Route 191 (US 191) is a north–south highway in the Western United States and a spur of parent route U.S. Route 91 that has two segments. The southern segment runs for from Douglas, Arizona on the Mexican border to the southern part o ...

all have legislative gaps in their routes for this portion.

References

External links

*{{UDOT Resolutions , routenum=1-901 Renumbering Utah State Route Renumbering, 1977 Utah State Route Renumbering, 1977 1977 renumbering 1977 establishments in Utah 1977 disestablishments in Utah Highway renumbering in the United States