Of the 40 busiest U.S. airports, 10 don’t allow pickups unless drivers have a chauffeur’s license or livery plates, including Atlanta, Orlando, Detroit, Boston and Philadelphia. Seattle, Minneapolis and New Orleans started allowing legal ride-sharing pickups only this year. Miami-Dade County approved an ordinance on May 3 allowing ride-sharing companies. Lyft Inc. has a permit to operate at the airport but Uber Technologies Inc. doesn’t yet, the airport says. In Kansas City and both Houston airports, Uber is permitted but Lyft isn’t.