Here's a map proposal from the 1890's showing the best and still most logical route:
Totally wreaking havoc on the Costa Rican border. The Ticos will not be happy, and they already have border disputes with Nicaragua.
To which Nicaragua will say, "Oh yeah, have many divisions do they have?", and the answer to that is none -- Costa Rica is proud of the fact that they have no standing army.
Except an army of Birkenstock-wearers who will lie in front of the bulldozers in protest.
This will be several billion dollars worth of ditch digging, who is putting up the money for this? China?
Big dig???? Did somebody say BIG DIG????
Now I know what's going on..
The bozos from Boston who presided over the Big Dig farce are looking for their next "money pit", or "glory hole" as it may be!
I wonder if Nicaragua has extradition?