common => fichier "building", Ctrl+F "railroad", et c'bon.
T'auras un truc de cette forme :
railroad = {
type = infrastructure
goods_cost =
{
timber = 100
cement = 100
steel = 100
}
time = 720
visibility = yes
onmap = yes
max_level = 6
province = yes
infrastructure = 0.16
movement_cost = -0.05
pop_build_factory = yes
spawn_railway_track = yes
}