Don't get me wrong, I love having a choice of different roads. Having the ability to place cobblestone roads in my halloween area and dirt roads in my wild west area is fabulous. Not so fabulous is t...
The only way to keep those characters way from dirt roads is using the only barrier characters don’t walk though: land not purchased
Put all your West Town below a barrier like that and this characters will try, but will not be smart enough to go around it. I will try to upload a picture.