TRB’s Transit Cooperative Research Program (TCRP) Synthesis 55: Geographic Information Systems (GIS) Applications in Transit examines the value of GIS to transit agencies in service and cost savings. The synthesis summarizes the experiences of a variety of transit agencies, with information from small- and medium-sized transit operators, as well as from large transit agencies. It documents current practices, effective applications, and challenges.

The document is found at the following URL:
http://trb.org/publications/tcrp/tcrp_syn_55.pdf