Originally Posted by ardecila
If the track is built to high-speed standards with the possibility of future electrification, that's fine by me.
Look at the Beeline Expressway using Google Earth or another mapping program. It's almost straight as an arrow. Building within the median of the tollway would require grade separation, at least on the new tracks. So, it'll be perfect for upgrading to HSR operations in the future.
The only real problems I see with using the median of the Beeline is once that corridor reaches Orlando. There's several highway bridges over the Beeline, I assume with concrete pillars in the median holding the overpasses up that the rail line would have to avoid, while at the same time the width of the median shrinks to almost nothing just north of the airport property. Of course, the rail line could leave the median and enter airport property. It'll have to to reach the existing wye just south of the Beeline anyways. I'm just not sure of the geography of that area, if such a rail routing would be possible. Don't forget, freight trains don't like grades, and we all know FEC would also want to run freights over the new line.