The Z fighting is reduced somewhat in the latest Testing versions.
You still see a lot of flickering in the distance with building windows, signs, etc., but at least the ballast and level crossings calm down the closer you get to them. Previously they would flicker like crazy the whole time they were rendered.
Not sure if it's a Z-buffer, or if objects are now rendering at a higher LOD to "power through" the flicker. There has been a noticeable slow-down in performance, however.
"My dog got loose once, what I did was show him his leash & he came running back, thinking it was time for a walk - stupid dog."