Wikipedia
Tri-Rail is a commuter rail line linking Miami, Fort Lauderdale, and West Palm Beach, Florida, United States. It is managed by the South Florida Regional Transportation Authority (SFRTA) along CSX Transportation's former Miami Subdivision, the line now wholly owned by the Florida DOT. The system has 18 stations along the Southeast Florida coast, and connects directly to Amtrak at numerous stations, and to Metrorail at the Tri-Rail and Metrorail Transfer Station and at Miami Airport station.
A second Tri-Rail line on the Florida East Coast Railway corridor, dubbed the "Coastal Link", is being planned, to be operational by 2020. The planned line will operate between Jupiter and Government Center in Downtown Miami, and add passenger rail between the downtown areas of West Palm Beach, Fort Lauderdale, and Miami. Combined with the existing Tri-Rail line, the Tri-Rail system would have a daily passenger ridership of almost 30,000; or approximately 9 million passengers per annum, doubling Tri-Rail's current ridership.