Specifications include, but are not limited to: Sheeting used for permanent traffic control signs shall be guaranteed by the manufacturer to comply with the following:
A. Types AA, AP and AZ sheeting processed and applied to new or refurbished aluminum shall perform effectively and maintain a uniform day/night color without streaks for a period of 10 years after erection.
B. Type ZZ sheeting processed and applied to new or refurbished aluminum shall perform effectively and maintain a uniform day/night color without streaks for a period of 12 years after erection.
C. The sheeting shall be considered unsatisfactory when it has deteriorated due to natural causes to the extent that any of the following conditions exist:
1. The sign has been determined by the purchaser to be ineffective when viewed from a moving vehicle under normal day and night driving conditions.
2. Permanent streaking or color variations (either day or night) develop on the sign surface
The reflective value of a sign(s) at the 0.2( observation angle/-4( entrance angle is below the values shown in Table II. The reflective values shall be determined by averaging random reflective measurements in accordance with the criteria in Table I. Reflective measurements will be made with a calibrated hand held retroreflectometer after wiping with a soft dry cloth to remove any dust, lint, or road film from the area to be measured.
D. When the sheeting does not perform in accordance with the guarantee, the manufacturer shall:
1. During the first 7 years after the sign is erected, provide all labor and materials to restore the sign surface to its original effectiveness.
2. During the next 3 years (5 years for ZZ) after the sign is erected, provide reflective materials to restore the sign surface to its original effectiveness. The purchaser will provide restoration labor.
E. The purchaser will date all signs by month and year when they are fabricated. This guarantee will be prorated accordingly for signs erected more than one year after fabrication.