Tri-Rail worked for my January AAF joyride when starting from Miami, I did not have an auto to get to Ft. Lauderdale. My itinerary was set forth over at the FEC Forum AAF topic.
Of course it took a long time, considering Metro Mover and Rail from my hotel to Airport and the 1.6 mile walk to AAF, but it worked. The Tri Rail equipment was definitely run-down, but it ran. Aboard, I met a young couple from of of the countries that was once within Yugoslovia who had arrived "Red Eye"; she spoke good English, he knew as much English as I do of whatever (I've found on my trips in as many years to Austria you need not know the local lingo). They were going to a cruiseship, and we're all set to get a taxicab or Uber (they had the app). Since they were flush for time, I suggested the transfer bus to the Airport (FLL), then just find Carnival's stand there and say "here we are; get us to the dock". We arrived at Dania and I could see the bus. I pointed to it; and after a "hug from her", they were on their way. It was about 11, and I'm confident they made Their 5P sailing.
My February joyride (actually a ride for a good Ribeye at Ruth's in WP) from Boca and with "Red Lex" (my Lexus GS), it was a drive to the free parking at Ft. Lauderdale, thence a ride North in Business with its comp Grape Juice, walk to/from Ruth's, return in Coach, lest I not be tempted by "the Grapes" on the return having to drive back to Boca.