TRB's Transit Cooperative Research Program (TCRP) Synthesis 121: Transit Agency Practices in Interacting with People Who Are Homeless reports on effective practices, approaches, and outcomes regarding interactions within the transit industry with people who are homeless. A literature review summarizes policies and practices used in both the transit and library communities. Because public libraries are similar to public transportation in offering services to all members of the general public and in being viewed as a safe haven for people who are homeless, the literature review includes an examination of library policies and procedures related to people who are homeless.