The public bus RIPTA 99 Providence/Pawtucket Line stops right in front of the building, the line goes from Kennedy Plaza in Downtown Providence to Downtown Pawtucket and back. For Schedules:
The Downtown Providence Amtrak Station is a 5-8 minute drive and a close walk to Kennedy Plaza.
The Peter Pan Bus Lines is blocks away.
The MBTA South Attleboro Station is a 10 minute drive, some of the MBTA trains continue to Downtown Providence.
The Providence, RI Airport TF Green International (actually in Warwick, RI) is a 15 minute drive.
The Boston, MA Airport Logan International is a 50 minute drive and there are numerous buses & trains to Providence.