- Having an AI that tries to monopolize and improve itself on some cities would be fun in the single game. It would create a little local competition between human VS ai instead of having AI's that always aim at the big picture.
CluelessPlus have a setting "Build new connections nearby existing ones (simple growing boundary box)", that you can enable. With it enabled, new connections will only start or end within a rectangle that is formed so that all existing connections fit within this rectangle. As it adds more connections, the rectangle grows, but it will not build new connections in a completely independent part of the map.
_________________My OpenTTD contributions
(AIs, Game Scripts, patches, OpenTTD Auto Updater, and some sprites)Junctioneer
(a traffic intersection simulator)