I can't find any real information on them; how do they influence colonial and trade range in only one direction, and by how much?
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I thought they only affect trade value, but I may be completely wrong.– mafuNov 18, 2015 at 10:58
1 Answer
I don't have confirmation, but I am guessing the one-directional system is done traveling from your capital outwards, so Europe can colonize America with a lower colonial range than America colonizing Europe because the one directional boost. Which trade nodes you can send merchants to is probably affected similarly.
I can't find information about the quantity of distance it increases.