You may choose your custom reflective sign depending on the visibility desired. Where engineer-grade reflective signs can be seen from approximately 500 feet away, high-intensity reflective signs can be seen from 1000 feet away, and diamond-grade from 1500 feet. Engineer-grade reflective signs are the most pocket-friendly out of the three and are suitable for parking lots, private drives, and other low-traffic areas. High-intensity reflective signs are three times more reflective than engineer-grade and cost a little more. They are best for regular road and traffic signs. Diamond-grade reflective signs are by far the most reflective, three times more than their high-intensity counterparts and consequently, are the most expensive. Due to high reflectivity, they are best suited for crucial intersections, construction zones, highways, and other high-traffic areas.