Tri-Rail is a commuter rail service linking Miami, Fort Lauderdale and West Palm Beach in Florida, United States. The Tri prefix in the name refers to the three counties served by the railroad: Palm Beach, Broward, and Miami-Dade. Tri-Rail is managed by the South Florida Regional Transportation Authority (SFRTA) along CSX Transportation's former Miami Subdivision; the line is now wholly owned by the Florida DOT. The 80.0-mile-long (128.7 km) system has 19 stations along the Southeast Florida coast, and connects directly to Amtrak at numerous stations, to Metrorail at the Metrorail Transfer station, Miami Airport station, and MiamiCentral, and to Brightline at MiamiCentral.