In 2020, American Airlines and Republic Airways parked more than 100 planes at Pittsburgh International after the COVID-19 pandemic caused them to cut flights out of their schedules. Airport officials estimated they could store about 140 planes on unused taxiways, runways, deicing pads, and other surfaces. The parked planes included American's Airbus A319, A320, A321, and wide-body A330 aircraft, as well as American's smaller Embraer E-190 Republic's E-170 jets. Also due to the coronavirus, Spirit Airlines began flights between Pittsburgh and Arnold Palmer Regional Airport, about 60 miles away in Latrobe, Pennsylvania, as part of a triangular route to Orlando in order to consolidate passengers going to Orlando onto one flight. Alaska Airlines also modified its nonstop service from Pittsburgh to Seattle to begin in Baltimore, stop in Pittsburgh, and continue to Seattle. The airport became the first US airport to deploy robotic floor scrubbers that use UV-C light to disinfect high-traffic areas. The coronavirus pandemic led to severe drops in traffic from the airport, as much as 95%. It also led to the delay of the airport modernization project. In September 2017, Allegheny County Airport Authority officials announced a $1.1 billion plan to reconfigure the terminal complex, including a new landside terminal and a new parking garage. Under this proposal, the current landside building would be demolished if another use is not found, and the number of gates be reduced from 75 down to 51. A new landside building would be constructed between the airside terminal's concourses C and D, with new security and baggage facilities, a new international arrivals area, and many other amenities to serve passengers. The board chairman of the Airport Authority, David Minnotte, said that "The people of Pittsburgh finally get an airport built for them and not USAir". No taxpayer dollars would be used to construct the new facility, and it will be instead financed with floating bonds, grants, passenger facility charges, and revenue from natural gas drilling on airport property. Construction was expected to begin in summer 2020 and the new terminal was slated to open in 2023. However, in April 2020 airport officials decided to delay the selling of bonds and start of construction due to the coronavirus pandemic, though the design work is continuing. They did not provide an estimate on when construction would begin or whether opening in 2023 was still possible. On November 13, 2019, plans were announced for a Hyperloop between Pittsburgh and Chicago via Cleveland, making a stop at the airport.