My mother is in an area that is affected as well and why I know the little bit about it that I do. I cannot imagine the traffic problems all those additional train trips per day is going to cause.
The thing is there isn’t any passenger service that is profitable. So what are they really up to? Some say it is to take advantage of expanded freight capacity planned for the Port of Miami (Panama canal container ships. FEC (parent company, freight) plans some sort of expansion of rails at the port and AAF (passenger subsidiary of FEC) plans to double or triple track sections en route to Orlando (the rails shared with the freight service). So this passenger service scheme could be a ruse to gain advantages, like tax exempt bonds. At one point I think they were going for taxpayer guaranteed loans, but that was dead once people found out about it.