to keep workers safe was estimated to cost at least an additional $12 million. Work was completed without any OSHA incidents, with 14,000 air samples taken during the construction. On March 21, 2014, signs for I-11 were installed along the US 93 corridor. On May 21, 2014, NDOT submitted an application to the American Association of State Highway and Transportation Officials (AASHTO) to request the creation of the I-11 designation between the Arizona state line and the I-215/I-515 Interchange in Henderson. AASHTO approved this request at their Spring 2014 Special Committee on US Route Numbering meeting, contingent on FHWA approval. On August 16, 2017, the first southbound segment was opened to traffic, with its accompanying northbound segment opening on January 27, 2018. On February 20, 2018, NDOT opened additional ramps connecting the new Railroad Pass Casino Road to both the Boulder City Parkway (current US 93 and US 95) and to I-11 (southbound exit and northbound entrance). The final portion of Phase 1, between the new casino access road and US 95, opened on May 23, 2018. On August 9, 2018, Phase 2 was opened to traffic, officially completing the Boulder City Bypass. Phase 2, which began construction on April 6, 2015, was expected to open by October 2018; however, in May 2018, the RTC announced that the section would be open by June 2018, three months ahead of schedule. That opening date was subsequently pushed back to August 9, 2018, as it was still in the post-construction stage. In March 2019, NDOT replaced I-515 signs along its southernmost stretch with I-11 signs. In July 2022, NDOT decided to route I-11 along the existing alignments of I-515/US 93/US 95 to downtown Las Vegas, then running concurrently with US 95 northwest to SR 157 rather than use I-215 or construct a new corridor as had been proposed. Current status , the only completed sections of I-11 are the Hoover Dam Bypass, the Boulder City Bypass, and a former section of I-515. The Nevada portion of the original I-11 corridor is a full freeway that meets current Interstate Highway standards from the Mike O'Callaghan–Pat Tillman Memorial Bridge on US 93 to the northwest of Las Vegas on US 95. While the bulk of US 93 through Arizona has been upgraded to four lanes, some portions of the corridor are not built to Interstate Highway standards, as there are scattered at-grade intersections, substandard