Not exactly sure if this one has been posted, I looked though this thread and didn’t see it.
I got to 531/531 a few minutes ago, this was my last road:

Don’t know how this entire road evaded me, the terrain around it wasn’t hiding it like it was a part of the natural road color, like the road in Express Railyard on a previous post.
Also, I too got “The Noisy Cartographer” achievement at 529/531 roads, must be a glitch with the achievement or something.
I hope that helps someone!
Edited by user Saturday, December 1, 2018 6:28:52 PM(UTC)
| Reason: Not specified