Upgrade routes with a project/wonder

[Gurra09]

I am modding the Roman Roads art (that came with BTS and is used in the Charlemagne mod) into my mod and would like to make it like this: There is a project/wonder and when it is finished all roads inside your cultural borders upgrades to roman roads. Does anybody know how I could code that?

 

[Gooblah]

I am modding the Roman Roads art (that came with BTS and is used in the Charlemagne mod) into my mod and would like to make it like this: There is a project/wonder and when it is finished all roads inside your cultural borders upgrades to roman roads. Does anybody know how I could code that?

I would think Python would be in order.

Try finding the code for that Nat'l Highway System event (that improves roads IIRC), and modify it so that if the wonder is built, find out which civ built it, and run through each plot that civ owns and improve any roads.

This is just a guess though, I have little experience with the Python area of Civ4.