The purpose of STA is to jointly and cooperatively develop programs of mutual interest that would benefit the citizens of the communities served. These transit systems (also referred to as Suburban Transit Association Providers) provide flexible transit services through a variety of programs including: flex routes, reverse commute services, local service between communities and/or regional transit centers, dial-a-ride services, and elderly/disabled transportation services.

The primary product of the systems, however, is express service during peak congestion periods.  Innovative approaches and strong customer service are hallmarks of the STA Providers. Such approaches include the use of penalties and incentives to manage the private providers who operate the transit service.  Other innovations include the use of coach-style buses, focused service from transit hubs and park & rides, and development at many of the transit sites, which helps cover the ongoing cost of such sites.