abandoned in 1937. On March 23, 1946, what would become the southern leg of US 93 past Kingman was added to the State Highway System as State Route 93. Between 1942 and 1958, the highway was rebuilt and reworked into a suitable highway for an eventual extension of US 93. Though the state wanted US 93 to be extended over all of SR 93 through Phoenix, Casa Grande and Tucson to the Mexico border in Nogales, a southern extension was only accepted by the AASHTO to US 89 north of Wickenburg in 1965. The rest of SR 93 kept its state route designation until 1984. Until 1992, US 93 ended a short distance north of Wickenburg, Arizona at a junction with U.S. Route 89. When US 89 was decommissioned in the area, the US 93 designation was carried on into Wickenburg. Between 2006 and 2012, several widening projects were completed on the section between Wickenburg and Interstate 40. New bypass bridge US 93 (with US 60 to the southeast of Wickenburg) is the shortest route between the fast-growing cities of Las Vegas and Phoenix, two of the largest cities in the Southwest (and is an officially designated portion of the CANAMEX Corridor). Upgrades of US 60 and US 93 to four-lane freeway status are scheduled between Las Vegas and Phoenix; as of 2019, most sections north of the Santa Maria River are already at four-lane expressway status (with some of the newest portions presumably built to Interstate standards) with construction ongoing. This routing is part of Interstate 11 (I-11) which is connected with Interstate 215 (I-215), Interstate 515 (I-515), U.S. Route 95 (US 95) and State Route 564 (former SR 146) at the Henderson Spaghetti Bowl (also known as the "Hender-Bender") interchange in Henderson, Nevada and will connect Interstate 10 in Tonopah. A segment of this new highway consists of a new route across the Colorado River called the Hoover Dam Bypass. The new crossing is the Mike O'Callaghan–Pat Tillman Memorial Bridge, the first so-called concrete-steel composite arch bridge built in the United States. The bridge is with a main span. The roadway is above the Colorado River. The bypass replaced the old section of US 93 that approached and crossed directly over Hoover Dam, which was inadequate by modern standards because there was one narrow lane in each direction, including several hairpin turns, many dangerous curves, and poor sight