SECTION 247—REFLECTIVE SHEETING
247.01 Description
This specification covers reflective sheeting used on traffic control devices to provide a retroreflective surface or message. The color of the reflective sheeting shall be as specified in the Contract. Reflective sheeting shall be certified in accordance with Section 106.06.
247.02 Detail Requirements
Reflective sheeting shall be selected from the Department’ s Approved List 46. Except where outdoor test- ing is not required (as noted herein), the sheeting and any applied coatings including inks, overlay films, and all other coatings shall be tested by either NTPEP , the Department, or other Department-approved facilities, to ensure all the materials and the completed sign meet the outdoor weathering requirements in ASTM D4956 for both Retroreflectivity and Daytime Color (Chromaticity and Luminance Factor %). Reflective inks and overlay films shall be approved by the sheeting manufacturer. All orange and pink sheeting shall be fluorescent (except where noted).
a.ASTM D4956, Type IX and XI Reflective Sheeting shall be used for Overhead Permanent Signs as specified in Section 701. Retroreflectivity and Color requirements shall be maintained for the values listed in ASTM D4956 after 3 years on the outdoor weathering test rack.
b.ASTM D4956, Type IV , IX and XI Reflective Sheeting shall be used for Non-Overhead Permanent Signs as specified in Section 701. Retroreflectivity and Color requirements shall be maintained for the values listed in ASTM D4956 after 3 years on the outdoor weathering test rack. 247.02
c.ASTM D4956 Type IX or XI Reflective sheeting shall be used on rigid devices that are not permanent signs or object markers, including but not limited to the following: • Temporary rigid (non-rollup) signs • Delineators (Standard ED-2, Standard ED-3, barrier, and guardrail) • Permanent impact attenuators (except permanent sand barrels) • Guardrail end terminals • T ype 3 barricades (Orange sheeting does not have to be Fluorescent) • Group 2 channelizing device vertical panels • Directional indicator barricades • STOP/SLOW hand paddles • Rear panels of truck- and trailer-mounted attenuators • Barrier panels temporarily installed on traffic barrier service The yellow portions of such devices shall be fluorescent. Retroreflectivity and Color requirements for all colors (except fluorescent orange and fluorescent pink) shall be maintained for the values listed in ASTM D4956 after 3 years on the outdoor weath- ering test rack. The retroreflectivity of fluorescent orange and fluorescent pink sheeting after 1 year on the out - door weathering test rack shall be at least 50% of the retroreflectivity values specified for new (non-weathered) sheeting. Color requirements for fluorescent orange and fluorescent pink sheeting shall be maintained after 1 year on the outdoor weathering test rack.
d.ASTM D4956 Type IV reflective sheeting meeting the ASTM D4956 Supplementary Requirements (S2) shall be used on the following traffic control devices: • Tubular markers • Flexible post delineators • Drums (See Note 1 below) • Temporary sand barrels (See Note 1 below) • Permanent sand barrels • Cones Note 1 - Reflective sheeting on temporary sand barrels and drums shall also conform to the following table: Minimum Coefficient of Retroreflection RA (RA =Candelas per foot-candle per square foot) Observation Angle (° ) Entrance Angle (° ) White Fluorescent Orange 0.2 -4 400 175 0.2 +30 200 100 0.2 +40 135 60 0.2 +45 120 40 0.5 -4 150 70 0.5 +30 50 30 0.5 +40 45 25 0.5 +45 40 20 247.02 The retroreflectivity of the sheeting after 1 year on the outdoor weathering test deck shall be at least 50 percent of the retroreflectivity values specified for new (non-weathered) sheeting, except that outdoor weathering testing is not required for reflective sheeting on cones. Color requirements shall be maintained after 1 year on the outdoor weathering test rack, except that outdoor weathering testing is not required for reflective sheeting on cones.
e.Grade DOT-C2 Conspicuity Tape shall conform to the retroreflectivity requirements of 49 CFR 571.108 and shall be used to delineate the back frame of trailer mounted traffic control devices (including, but not limited to, Portable Changeable Message Signs, Automatic Flagger Assistance Devices, electronic arrow boards, speed trailers, camera trailers, and portable lights) and traffic control devices equipped with gate arms. Daytime Color shall conform to the requirements of ASTM D4956. Outdoor weathering testing is not required for Grade DOT -C2 conspicuity tape.
f.Reflective sheeting used on Retroreflective Rollup Signs shall conform to the following: Minimum Coefficient of Retroreflection RA (RA =Candelas per foot-candle per square foot) Observation Entrance White Green Fluorescent Fluorescent Angle (° ) Angle (° ) Orange Pink 0.2 –4 500 60 200 200 0.2 +30 200 24 80 100 0.5 -4 225 - 90 100 0.5 +30 85 27 35 35 1.0 -4 20 10 10 10 1.0 +30 15 - 8 10 1.5 -4 5 - 3 2 1.5 +30 4 - 1.5 2 Outdoor weathering testing is not required for reflective sheeting used on rollup signs.
g.Reflective sheeting on hand signaling flags and gate-arm flags shall conform to the following: Minimum Coefficient of Retroreflection RA Observation Angle (° ) Entrance Angle (° ) Orange/Red Sheeting (RA) 0.2 –4 50
247.03 Reflective Sheeting Warranty Requirements
The minimum values of retroreflectivity maintained during the warranty period shall be the same as those required for the maintained coefficient of retroreflection values as indicated in ASTM D4956 for Outdoor Weathering Photometric Requirements for All Climates. Loss of colorfastness is considered to have occurred if the color of the sheeting is not within the color specification limits in ASTM D4956 during the full duration of the warranty period. Warranty periods shall begin on the date of installation. Contractor shall label permanent signs with date of installation as per Section 701. 247.03
Referenced in this section
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Source: Road and Bridge Specifications, 2020 Edition. Pages 331–333 of 1,065. View official source ↗