I didn't know that question was aimed at me as it was directed at MoMoko Fan's comment.
No I have nothing to do with the creation of this material it is using the Terrain Editor.
I open scene composer -> add terrain -> edit terrain -> add layer -> paint road stripe on -> save.
The scene and terrain is built into the ,j3o.
So no it's not set in code by me in any way shape or form.
I wouldn't have taken to the forums if I did not truly believe this was a bug behind the scenes.