Update: Billy has more today, including a link to another map. I have another theory though. Perhaps the N/S line does in fact link up with the E/W line in Lakeland by Lake Wire. Then both lines share that main E/W corridor between Lakeland and Auburndale. In Auburndale, the lines split, one heading East the other South. That would explain the northern section of crossing in Auburndale....where a diesel usually sits parked when not in use.

If this is the case then the new CSX facility in Winter Haven will also have a big impact on Lakeland. As Billy says:

consider this: CSX is planning to run virtually all its freight traffic in Florida on the S-line into the huge new integrated logistics center. It’s freeing up the A-line for a potential communter rail system. There’s only one route those trains on the S-line can take if they’re heade for the big new center, if I’m reading the map correctly. That route runs smack through downtown Lakeland

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Yesterday in the Polk County News Blog, Billy talked about the crossing of the two major CSX freight lines in Florida. Billy (and CSX) place the location in the Auburndale area. Could this photo be it?

Looking at Google maps, it seems that the two lines (one East/West the other North/South) might cross under the U.S. 92 bridge in Auburndale. You can see the two screen grabs below. One is a standard map, the other is the satellite view (with some cloud cover).

However I think that the North/South line shown on the map might not be the major line since there is usually a CSX diesel locomotive parked there during the weekend and at night. Not the best thing for traffic.