 Passengers boarding a Metrobus in downtown Washington, Wednesday, Dec. 7, 2022. Pablo Martinez Monsivais AP Washington, D.C., is on the verge of eliminating bus fares for city residents, joining other U.S. cities that are working to make metro bus and rail systems free to ride. Already, Boston, San Francisco and Denver are experimenting with ... The zero-fare public transit movement is picking up momentum... 