On Mon., Sept. 2 at 10 a.m., the 38th annual Pittsburgh Labor Day Parade, hosted by the Allegheny County Labor Council, will kickoff outside of PPG Paints Arena in Downtown. The parade will travel through on Grant Street and Boulevard of the Allies Downtown before ending up at the United Steelworkers building. The parade is one of the largest Labor Day parades in the United States, in previous years attracting 60,000-70,000 participants. There will be road closures and parking closures along the route of the parade. Due to the holiday, Port Authority buses will operate on a Sunday schedule.