MIAMI — The man who oversees south Florida’s Tri-Rail commuter rail system is retiring after 15 years with the operation, the last five in the top job.

Jack Stephens, executive director of the South Florida Regional Transportation Authority since February 2014, will retire with the end of his contract on Dec. 31, the South Florida Sun-Sentinel reports.

Stephens told the paper his biggest achievement is leading the effort to extend Tri-Rail into Brightline’s MiamiCentral station, a project scheduled to be completed in late 2019. [For a look at the station, see “Brightline moves forward with start of Miami service,” Trains News Wire, May 14, 2018.] He also cited the system’s reliability: in July, Tri-Rail trains had a 96.6 percent on-time rate, the best since the service began in 1989.

Stephens joined Tri-Rail as deputy executive director in 2003.