I have to second Alan as I use and recommend Gorilla Super Glue on my ELevated bridge system and on the train sheds. I would recommend that it be used on unpainted or unstained surfaces though.
I use a good yellow wood glue like Titebond 2 or 3 on all of my other bridges with great success. I have experimented w Gorilla wood glue which works well however dislike the expansion process as it cures.
jim r from bridgeboss.com