Retro-reflectivity is a term used to describe how light is reflected off of a surface and return to its original source (“retro”-reflector). Traffic Sign Sheeting materials now use technology with small glass beads or prismatic reflectors that allow light from vehicle headlights to be reflected by to the vehicle and the driver’s eyes, thus making the Sign appear more bright and visible to the driver.

For retro-reflectivity to work properly, there needs to be a light source (vehicle headlights), a target (traffic sign), and a receptor (driver’s eyes).

• Reflective Sheeting is the material placed over the bare aluminum on Traffic Signs to make them reflective. Sheeting comes in Engineer Grade, High Intensity Grade, and Diamond Grade (see below for details.) Most people think that Highway Signs are painted, but the finish is actually the Reflective Sheeting.

• Engineer Grade Reflective Sheeting is the minimum reflective finish put on Traffic Signs. This is also the cheapest and least reflective option. The life span is about 5-7 years. This application is primarily used for Handicap and Parking Signs.

High Intensity Grade Reflective Sheeting is more reflective than the standard reflective finish. The average life span is 10 years. High Intensity Sheeting is now the minimum required sheeting for all MUTCD Traffic Signs.

Additional Benefits of High Intensity Prismatic Sheeting:

• Meets ASTM D4956 Type III and Type IV Specifications.
• Tougher topcoat provides improved scuff, scratch and gouge resistance and increased durability for the demanding need of the work zone.
• Vivid daytime colors provide 24-hour performance with increased daytime visibility.
• The improved optical packages increase nighttime visibility.
• Better for the environment.

Diamond Grade Reflective Sheeting is the maximum reflective finish that is put on Traffic Signs. It has an average life span of over 10 years.

Additional Benefits of Diamond Grade Sheeting:

• State of the art technology.
• 100 percent efficient optical elements, which return almost 60 percent of available light.
• Exceeds ASTM Type XI Specifications.
• Delivers optimal performance where and when drivers need it most.

  Diamond Grade Reflective Sheeting is the maximum reflective finish that is put on Traffic Signs. It is 10 times more reflective than Engineer Grade. It has an average life span of over 10 years.

  Additional Benefits of Diamond Grade Sheeting:

  • State of the art technology.
  • 100 percent efficient optical elements, which return almost 60 percent of available light.
  • Exceeds ASTM Type XI Specifications.
  • Delivers optimal performance where and when drivers need it most.