TRB’s Transit Cooperative Research Program (TCRP) Synthesis 99: Uses of Social Media in Public Transportation explores the use of social media among transit agencies and documents successful practices in the United States and Canada.

For the purposes of the report, social media are defined as a group of web-based applications that encourage users to interact with one another, such as blogs, Facebook, LinkedIn, Twitter, YouTube, Flickr, Foursquare, and MySpace.

An eReader friendly PDF version of TCRP Synthesis 99 is also available.