A federal judge’s decision Monday to strike down a national mask mandate on airplanes and mass transit won’t change the rules on Metra and the CTA — for now. A spokesman with Metra said riders will still be required to wear masks on trains "while we assess the situation." At Chicago’s Union Station, Amtrak passengers do not have to wear a mask. A Metra commuter train conductor works at Union Station on April 28, 2020 in Chicago, Illinois. The mask requirement covered airlines, airports, mass transit and taxis, and was the biggest vestige of pandemic restrictions that were once the norm across the country.