What is the status of the Miami station move? I know they are planning to move it to the new airport intermodal center, but that was delayed due to poor planning for the length of the trains blocking a road. I just haven't been able to find a status update in a while. We just booked a roommette on the Silver Star to/from Columbia-Miami in November. Thanks!
The last public news on this was that Amtrak is going to move to the Miami Airport station in 2016. Which is a rather large window. There is a thread on the delays and screw-ups on the Miami Airport station, which was going to called Miami Central Station (until All Aboard Florida started building their station in downtown Miami):
Miami Central Station (MIA Airport).
As for the new rail and ties going in at Hialeah, the Silvers will still use the facility for overnight servicing, so the track work probably doesn't indicate anything about the plans for relocating the Miami passenger stop to the shiny new intermodal station at the airport. Likely just routine track maintenance.