- 918 - SECTION 1069 -- TEMPORARY PAVEMENT MARKING
1069.01 Description
1.This Specification covers te mporary pavement marking tape ASTM D 4592 (Type I and II), Raised Pavement Markers (RPM), overlay markers, and pavement marking paint.
1069.02 Material Characteristics
1.Temporary Pavement Marking Tape, Type I:
a.Temporary pavement marking tape, Type I, shall be made with a tape-like material manufactured from a thin sheet of malleable aluminum coated with a white or yellow binder. It shall be reflectorized with glass beads and backed with a pressure-sensitive adhesive.
b.The tape shall be 4 inches (100 mm) wide, and the reflectorizing glass beads shall have an index of refraction of not less than 1.90.
2.Temporary Pavement Marking Tape, Type II:
a.Temporary pavement marking tape, Type II, shall be a mixture of high quality polymeric materials and pigments with glass beads throughout the pigmented portion of the film and reflectorized with glass beads bonded to the top surface.
b.The film shall be precoated with a pressure-sensitive adhesive. Unless otherwise specified, the te mporary pavement marking shall be 4 inches (100 mm) wide and the reflec torizing glass beads shall have an index of refraction of not less than 1.90.
c.A nonmetallic medium sha ll be incorporated to facilitate removal either manually or with a recommended roll-up device. The tape shall be capable of being easily removed from asphalt and Portland cement concrete surfaces intact (or in larg e pieces), at temperatures above 41°F (5C).
d.Removal shall be accomplished without the use of heat, solvents, grinding, or sandblasting.
3.Raised Pavement Markers: a. Raised pavement markers shall consist of a plastic shell having a minimum width of 4 inches (100 mm) and maximum height of 0.79 inch (20 mm) with one or more prismatic reflecti ve faces with a minimum of 0.38 square inches (2.45 cm 2) of reflective surface for each direction required to reflect incident light.
b.The marker shall be fitted with pressure-sensitive adhesive for application to a primed surface.
4.Overlay markers: a. Overlay markers shall be made from impact-resistant polyurethane plastic.
b.The marker's approximate dimensions are 4 inch (100 mm) width by 2 inch (50 mm) height. The mark er shall have 1 or 2 (as required to be seen) micro-prismatic re flective faces [approximate dimension 1/4 inch x 4 inches (6 mm x 100 mm)]. Temporary Pavement Marking 1069.03 - 919 - c. The base of the marker shall be fitted with a butyl rubber pad. Overlay markers shall not be used in pl ace of raised pavement markers, tape, or paint.
5.Temporary pavement marking paint and glass beads shall be shown in the contract. Any commercially available reflectorized traffic paint may be acceptable if the contract does not specify the type of paint.
1069.03 Acceptance Requirements
1.Acceptable temporary pavement markings, except paint and glass beads, are shown on the Departm ent’s Approved Products List.
2.Temporary pavement markings not on the Department’s Approved Products List shall be approved by the Engineer before use. - 920 - SECTION 1070 -- HIGHWAY SIGNS
1070.01 Description
1.Materials authorized for use in constructing highway signs, Type A and Type B, are listed in this Section.
1070.02 Material Characteristics
1.Reflective Sheeting:
a.The reflective sheeting for sign reflectorization shall meet the requirements of ASTM D 4956.
b.All reflective sheeting for Type A and Type B signs shall be Type IV sheeting.
2.Overlay Panels:
a.Overlay panels for Type B signs shall be at least 0.04 inch (1 mm) thick sheet aluminum (ASTM B 209M Alloy 6061-T6) surfaced with reflective sheeting. The type and color of the reflective sheeting shall be as shown in the contract.
b.Panels cut from coil sheet will not be accepted. 3. Letters, numerals, symbols, and borders for “Type B Signs” shall be reflective materials meeting the requirements of ASTM D 4956 for Type IV sheeting direct applied or detachable copy.
4.Signs shall meet the size a nd shape requirements of the Manual on Uniform Traffic Control Devices for Streets and Highways.
5.Reflective background sheeting for all signs shall conform to ASTM D 4956.
6.Routemarkers: a. The State, U.S., and Intersta te Highway routemarkers to be used as legend units on Type B signs shall be fabricated from at least 0.08 inch (2 mm) thick sheet aluminum alloy 6061-T6 (ASTM B 209M) and shall be processed in accordance with the reflective sheeting manufacturer's recommendations.
b.Reflectorized sheeting shall conform to AASHTO M 268. c. Color and sizes of routemarke rs shall be shown in the contract.
d.The routemarkers shall be attached to the sign background in the same manner as the other legend units.
e.Special designs on the Stat e routemarker shall be obtained from the Department’s Traffic Engineer.
7.Supports:
a.Supports for Type A and Type B signs shall be steel beam or wood breakaway posts. The size, shape, construction, and weight per foot (meter) shall be specified in the contract.
b.The sign supports shall be cut off at the same elevation as the top of the sign.
c.The steel beam breakaway posts and stub post steel shall comply with ASTM A 36/A 36M with a working stress of 20,000 psi (138 MPa).
Source: Nebraska Standard Specifications for Highway Construction, 2017 Edition. Pages 952–953 of 1,048.