[Lee Stewart]

green is a “cool” color that won’t be distracting. Being on an interstate or highway is already hazardous because of high-speed limits. Because of this, you have to keep your eyes on the road at all times.

“It blends in enough to be considered part of the scenery, but sticks out enough to notice when you need it,” says ADOT’s John LaBarbera.

If highway signs, mile marker signs, or any other non-emergency signs were a different color, like red, our eyes would be darting all over the place, making driving even more hazardous.