We asked in days of yore. Roads are both. Admin for logistics, Diplomacy for trade and culture ties.They generate diplomacy, but roads are construction projects.
We know that admin heroes are related to construction as we had Magwyna proc during the original aqueduct.
Diplomacy is highly likely to be stable, because you need that to be able to relate to people like they need to.As I just said, wouldn't it be better if you want a good character that can be king to have a Herioc Admin or Diplo rather than Genius? Our literal definition for geniuses, as shown by the priests, are the mentally or physically ill. I voted to completely erase the DB, but if I were to vote for a character, it seems smarter and less likely to go bad in an insanity roll to vote Heroic.
Well its lunch break so...
Crews could be made smaller, allowing ships to carry more stuff, and with a combination of speed and seaworthiness could easily cut across the sea directly instead of mostly following the shore.