extension to the airport than one to downtown Las Vegas. On December 7, 2006, Clark County commissioners granted permission for the proposed extension to Harry Reid Airport. Funding had not yet been identified. On September 9, 2008, the monorail company provided details of the proposed expansion to the Las Vegas Convention and Visitors Authority board. The intended airport extension would begin at the new Terminal 3, with the first stop near Terminal 1, turn north on Swenson Street, then continue west on Tropicana Avenue before turning north at Koval Lane to meet up with the existing system behind the MGM Grand. This route was proposed to be built with private funds and would have added approximately four miles to the existing route, doubling the length of the system. When the monorail company announced details of the extension in September 2008, the airport extension was to be built with private funds and was expected to be built by 2012. However, as of March 2011, the Las Vegas Monorail Company was still in the planning phases of the proposed extension to Harry Reid International Airport with a proposed stop on the UNLV campus. The monorail company announced in May 2015 that it is proposing instead an extension to the Mandalay Bay Resort and Casino and an infill station at the Sands Expo & Convention Center. Subsequently, the Regional Transportation Commission of Southern Nevada announced that a new underground light rail system under the Las Vegas Strip, which would connect Downtown Las Vegas with the airport, is in the long-term planning phase. Mandalay Bay extension In March 2018, the Clark County Commission approved a proposed extension to Mandalay Bay, putting the monorail closer to Allegiant Stadium. The monorail company planned to start construction on the extension in June 2018 and have it completed by September 2020, in time for the completion of the stadium and Las Vegas Raiders inaugural season in Las Vegas. In November 2018 it was confirmed that two new Monorail stations would be built; one at Mandalay Bay and another at the MSG Sphere with completion by 2021. In May 2019, it was revealed that lack of funding has delayed the start of construction on a Mandalay Bay extension. As of March 2020, there is no timetable to begin construction on an extension nor a completion date. See also List of monorail systems List of rail transit systems in North