A private non-profit association in Utah, the Utah Highway Patrol Association (UHPA), had been placing 12 foot tall white Latin crosses along roads and highways controlled by the state. The Utah Highway Patrol allowed the UHPA to use the trademark logo of the patrol as well. American Atheists filed suit in 2005 on 1st Amendment grounds and then on 10/31/2011 the US Supreme Court refused to hear the case leaving intact the ruling that the placement of crosses was unconstitutional. Supreme Court Justice Clarence Thomas’ head exploded.
This again was an effort of religious right groups to make the Latin Cross generic which is the only way it might have made them constitutional.