Halifax Regional Municipality | United States Department of Transportation | Bombardier Transportation | Southern Pacific Transportation Company | Department of Transportation | Nigerian Television Authority | National Transportation Safety Board | CSX Transportation | Tennessee Valley Authority | Larissa (regional unit) | New York City Department of Transportation | Transportation Security Administration | Port Authority of New York and New Jersey | Palestinian National Authority | Metropolitan Atlanta Rapid Transit Authority | Massachusetts Bay Transportation Authority | Coalition Provisional Authority | New York City Housing Authority | Financial Industry Regulatory Authority | Swiss inventory of cultural property of national and regional significance | Regional Railways | regional rail | Port Authority Trans-Hudson | Financial Services Authority | Chania (regional unit) | Transportation Research Board | regional theatre | New York State Department of Transportation | Namibian local and regional elections, 2010 | Land Transport Authority |
Caltrans leased an additional four bilevel coaches from Chicago's Regional Transportation Authority but these could not be used because they required head end power (HEP) for heating and the SP's locomotives used steam heat, which was not compatible.
Waccamaw Regional Transportation Authority (or Coast RTA, formerly both Waccamaw RTA and Lymo) is a public bus service along the Grand Strand in Horry County, South Carolina.
Outside of Davidson County, MTA collaborates with the Regional Transportation Authority (RTA) to provide express service to Brentwood, Franklin, Gallatin, Hendersonville, Lavergne, Smyrna, Murfreesboro, Spring Hill, Joelton and Springfield.