Share 'Transportation at Worlds in Louisville 2013'

Does anyone know if there will some sort of public shuttle available in Louisville to get between the downtown hotels and the race course?  I called the Galt House Hotel and they had no idea, having not been told anything by the organizers (and they weren't providing one themselves). Any help? I really don't want to rent a car there.  Seems silly to rent one to drive 2.5 miles--and then not have…