45 Degree Highway Turn
It may seem stupidly simple, maybe I missed something, but I found it extremely annoying that I couldn’t draw both highway directions as a single brush, because they would always end up wonky and seperating when it came to corners. This was especially annoying when I created my custom map and I tried to place the highways on it.
So, I used the grid in the asset editor to make 90 degree and 45 degree turn puzzle pieces that maintain the same distance between the highways as the default (and probably most custom) interchanges.
Now you can have perfect highways without using trees or buildings plonked down specifically for road building reference!