Interstate 11 is the designation adopted for the U.S. 93 corridor between Phoenix, Arizona, and Las Vegas, Nevada. Future I-11 corridor signs were posted along U.S. 93 south along the Hoover Dam Bypass freeway, and beyond its split with Interstate 40 east by 2014.
The initial portion of Interstate 11 built was the Hoover Dam Bypass, a four mile stretch of freeway traversing the El Dorado Mountains and Colorado River Canyon east of Boulder City. Signed as U.S, 93, the four lane freeway shifted through traffic away from Hoover Dam onto the Mike O’Callaghan – Pat Tillman Memorial Bridge. The twin-rib concrete arch span opened to traffic on October 19, 2010.
Succeeding sections of I-11 constructed included the Boulder City Bypass. Split into two phases, Phase 2 involved a new terrain route looping 12.5 miles southwest from the interchange with SR 172 (Exit 2) toward Boulder City Municipal Airport (BVU) and the U.S. 95 expressway leading south toward Laughlin. Under the direction of the Regional Transportation Commission (RTC) of Southern Nevada, the $235 million design-build contract for work was awarded in January 2015 and completed October 2018.6
Phase 1 extended the RTC portion of the bypass north from U.S. 95 to Railroad Pass, and upgraded a portion of U.S. 93-95 northwest to Interstate 515. Costing $83 million, work on the 2.5 mile section broke ground in May 2015 and was completed on January 27, 2018.6 It included a new parclo interchange for Railroad Pass Hotel and Casino, and a south side frontage road leading back to Dawson Avenue in Henderson.
The future travel lanes of Interstate 11 ran along the west side of the old U.S. 93-95 roadway at Railroad Pass. Southbound U.S. 93-95 shifted to the new roadway on August 15, 2017.7 07/21/17
Installation of I-11 signs began appearing in Fall 2017 when initial southbound lanes of the bypass opened to Railroad Pass.5 I-11 formally replaced I-515 from the exchange with I-215/SR 564 southeast once the entire Boulder City Bypass opened. U.S. 93-95 was also realigned onto I-11 following the completion on January 27, 2018 of the northbound roadway from the interchange with U.S. 95 at Exit 14 to Foothills Drive in Henderson.6 The American Association of State Highway and Transportation Officials (AASHTO) ultimately approved this routing on May 29, 2014.
Discussion continues from Nevada politicians for the concept of extending the Interstate 11 corridor beyond Las Vegas to at least Reno or Fallon. Improved freight travel and trade with Mexico are cited as potential benefits of the extension.
New guide signs posted along Interstate 15 at I-515/U.S. 93-95 in 2021 included a space reserved for an I-11 shield beside U.S. 95 for Exit 42 A. Additionally signs for U.S. 95 along CC-215 (Bruce Woodbury Beltway) at the Centennial Bowl Interchange included space for Interstate 11 markers.
AASHTO approved a request by the Nevada Department of Transportation (NDOT) during the October 2022 meeting of the Special Committee on U.S. Route Numbering for the northwestern extension of Interstate 11 through Las Vegas. I-11 replaced the remainder of I-515 between I-215/SR 564 and the Spaghetti Bowl interchange joining I-15, U.S. 93 and U.S. 95 near Downtown Las Vegas. I-11 also overlays U.S. 95 northwest to SR 157 (Kyle Canyon Road) beyond the Centennial Bowl interchange with CC-215.