 Closures of Broadway in the Theater District south of 47th Street and around Herald Square in 2009 resulted in major changes to the M6's southbound service, with the northern half of the route shifting to Seventh Avenue before returning to Broadway in the vicinity of Union Square.On July 13, 2009, southbound M6 service was rerouted to run across 23rd Street instead of 14th Street to provide more consistent service.On June 27, 2010, due to budget problems, the M6 was discontinued and the M5 was extended to South Ferry via Broadway to replace former M1 and M6 service south of Houston Street.