Is there an advantage to building a road to a city-state before they request one?
Occasionally city-states will request that you build a road to connect them to your trade network, giving influence when you do. Is there any advantage to building a road to a city-state before they request it?
Solution 1:
No. You can't form trade routes with city states, (at least with vanilla/G&K), so there isn't much a of a point to paying the cost of a road for nothing. Unless you want to set up a route for invasion... ;)
See Affine's comment if you're wondering about BNW