U.S. Secretary of Transportation Pete Buttigieg speaks to Amtrak employees during a visit to Union Station in Washington, D.C., last month.

WASHINGTON, DC – FEBRUARY 05: U.S. Secretary of Transportation Pete Buttigieg speaks to Amtrak employees during a visit at Union Station February 5, 2021 in Washington, DC. Secretary Buttigieg placed visit to front line rail workers as well as officials from Amtrak, Washington Metropolitan Area Transit Authority, Maryland Transit Administration and the Virginia Railway Express to discuss the mask requirements and the administration’s support for additional COVID-19 relief funding for public transportation. (Photo by Alex Wong/Getty Images)