Current studies by the FHWA concerning highway and road construction and Work Zone Safety issues state that: "To be effective, devices used for construction zone traffic must: compel attention, convey a clear and simple meaning, and permit adequate time for driver response." Therefore, we believe that makeshift coverings by rags and bags are not safe!
PIE is the founder, original designer, manufacturer, and direct distributor of "NOT IN SERVICE" traffic sign and signal covers since 1990. Around 80% of our sales are from satisfied returning customers. We created specifications in 1994 which became the foundation requirements for contractors to stop using unsafe and makeshift covers all together after 110 years of HWY industry.
Because our covers are safe, clean, reusable, handy, uniform, environmentally friendly, practical, and easy to order. They will also stay intact during the entire duration of your project.They are made to last and have a four year limited warranty.Use them during highway, road and street construction projects and maintenance on "NOT IN SERVICE" traffic signs and signals,unused railroad flashers and on state and national park visitor signs during the off season.