TRB’s Transit Cooperative Research Program (TCRP) Report 118: Bus Rapid Transit Practitioner's Guide explores the costs, impacts, and effectiveness of implementing selected bus rapid transit (BRT) components.  The report examines planning and decision making related to implementing different components of BRT systems, updates some of the information presented in TCRP Report 90: Bus Rapid Transit, and highlights the costs and impacts of implementing various BRT components and their effectiveness.