The cost of installation, maintenance, rehabilitation and operating costs for illuminated overhead sign structures is a concern for several Alberta Infrastructure operations managers. A very...
Description
The cost of installation, maintenance, rehabilitation and operating costs for illuminated overhead sign structures is a concern for several Alberta Infrastructure operations managers. A very high-brightness reflective sheeting material was introduced in 1994 as a possible alternative to illumination. Since then several new products have emerged with a similar claim of superior retro-reflectivity properties when compared to traditional sheeting materials that were used in the past. A demonstration project was developed in order to assess the comparable performance of these materials and determine the minimum sign sheeting requirements for non-illuminated overhead signs. Based on this demonstration it is recommended that the department continue to specify using 3M's Diamond Grade (VIP) series 3990 as a proven product for use on overhead signs and for other specialized signing requirements.