So, getting off topic like we so LOVE to do in this forum,
, Why do you think George, that it's going to take them so long to double track what used to already be double tracked in NC?
Without looking at the place, I would be guessing, but there are several reasons:
Remember the second main has been gone for about 40 years, so a lot could have happened.
1. The original was probably on 13 foot centers. Generally the current standard is 14 feet or more. I would want to see at least 15 feet, so some roadbed widening would be needed even if everything else is still as was when the track was pulled up.
2. There may be some single track bridges that need replacing.
3. The remaining track may have been shifted in some areas so new roadbed is required for at least part of the distance. (I know this has happened in quite a few places on Southern and other railroads, but not sure if true for any of this.
4. There may be washouts, ditch widening, and other things that have taken away part of the old roadbed.
5. There may be, and probably are signal masts in the old roadbed that need moving, but the signal system must be kept functional at all times. This may include buried cable that need to be relocated.
6. You are working next to a very busy active track, so there will be a lot of pauses in the work as trains go by.
Probably several other issues I have not thought about.