Advance
Expanded Infrastructure Network
Our national road network is a vital part of our commercial and administrative success. As such, we should care to maintain and improve it.
Advance tree
The game files don’t say where this goes: it has no requires, so the game places it in the 
Reformation tree itself.
Modifiers
Definitionin_game/common/advances/4_choices_adm.txt:204
206icon = road_building
207for = adm