Input (grade 13): The Billups Neon Crossing Signal was a prototypical grade crossing signal installed at a dangerous Illinois Central crossing on Mississippi Highway 7 (now Mississippi Highway 332) in Grenada, Mississippi.
Output (grade 8): The Billups Neon Crossing Signal was a special signal to warn car and truck drivers that a train was coming. It was placed at a dangerous Illinois Central railroad crossing on Mississippi State Route 7 in Grenada.