TRB's Transit Cooperative Research Program (TCRP) Report 84: e-Transit: Electronic Business Strategies for Public Transportation, Volume 5 - Concept for an e-Transit Reference Enterprise Architecture examines the need for and uses of a reference enterprise architecture; the process for its development based on using systems engineering concepts and practices; the basic concepts behind systems engineering and enterprise architecture; and the transit-specific tasks associated with creating an e-transit reference enterprise architecture.