Cities skylines has a tool (I think it is a mod but not sure) that kinda does this, except better! [haha] Basically it allows you to draw splines on the map, and spawn props using a certain interval. Let's say you want a neat row of threads next to one of your roads (or paths in PC). Instead of placing each individual tree, you just draw the bezier curve following the road and it places all the trees at once! I really hope we get to see a feature like this in Planet Coaster, as it would make placing everything from trees and hedges to lanterns and fences so much more easy. But more importantly, it would place them at the exact distance you specified from each other and it would save a lot of time.
Currently placing custom fences, curbs or whatever alongside paths is the most boring thing ever. It's such a chore.