I've found that this one has an issue tiling on anything but absolutely flat ground, so I made one slightly wider that doesn't have the problem and only connects using the one-way roads (you fill in the gaps for highway) because I cannot for the life of me get it to tile perfectly in both directions yet.

I'll work on it more and update this, although updating seems broken right now so I may have to post an entirely new version.

Been looking for this, because I'm lazy and will not do it on my own in asset editor