User:MatthewAnderson707/sandbox/County Road 91 (Mohave County, Arizona)

Mohave County Road 91 (CR 91) is a north–south county–maintained highway in Mohave County, Arizona and acts as the secondary route between Mesquite, Nevada and St. George, Utah through the Arizona strip. The highway roughly parallels the Virgin River and Interstate 15 between the Nevada state line and Littlefield before heading directly north on its own into Utah, continuing across the state line as Washington County Road 91.

Before 1974, present-day CR 91 comprised the entirety of U.S. Route 91 (US 91) through Arizona and was among the original U.S. Highways commissioned within the state back in 1926. It was the original main highway between Las Vegas, Nevada and Salt Lake City, Utah, with the national termini of US 91 being in Long Beach, California and the Canada–United States border near Sweetgrass, Montana. Following the completion of I-15, which effectively replaced the entire route, US 91 was completely decommissioned in Arizona as a U.S. Highway and a part of the state highway system. Despite the fact US 91 was decommissioned in 1974, the old highway wasn't formally commissioned by Mohave County as CR 91 until 2009.

History
Mohave County Road 91 (CR 91) was originally designated as the Arizona section of U.S. Route 91 (US 91) on November 11, 1926, by the Bureau of Public Roads, which was a division of the United States Department of Agriculture. Between the Nevada state line east of Henderson and the Utah state line south of St. George. Nationally, US 91 ran from US 66 in Daggett, California to the Canadian border in Sweet Grass, Montana. The US 91 designation was formally recognized and established by the Arizona State Highway Department (ASHD), during the numbering of the Arizona State Highway System on September 9, 1927. At the time of its designation by the ASHD, US 91 had a total length of 17 mi. US 91 also served as the main route through Littlefield. The route was also designated as part of the "7-Percent System". This was a was a nationwide network of state highways receiving federal aid, as designated following the passage of the Federal Aid Highway Act of 1921.

In 1928, US 91 was entirely unimproved and unpaved between Nevada and Utah. The section through Arizona also had no major junctions or intersections with any other state or numbered highway. By 1929 the entire highway had been graded. Further construction and improvements to the roadway quality and surface of US 91 were being carried out through 1930. All 17 mi of US 91 in Arizona was paved by 1931.

On June 25, 1974, the American Association of State Highway and Transportation Officials (AASHTO) approved the Arizona State Highway Department's application to remove US 91 from within the entire state of Arizona, officially decommissioning the highway. This left I-15 as the only major highway servicing the corridor through the Arizona strip and Littlefield. Mohave County adopted the entire Arizona section of former US 91 on August 3, 2009, officially designating it as Mohave County Road 91.