955.1 955.2(b)
955.1DESCRIPTION —This work is the furnishing and installation of assemblies for the control and
illumination of vehicular traffic signals, pedestrian signals, or lane control signals, which includes the appropriate housing and mounting hardware.
955.2MATERIAL —
• Traffic Signals -General . Section 950.2.
• Certification. Section 106.03(b)3.
• Plastic . Opaque polycarbonate resin molding, conforming to ASTM D3935. Federal yellow in color, except the inside of the visor, will have a non- reflective black finish.
ͦ Aluminum. Finish exterior of aluminum housings as follows:
Clean and coat surfaces of the signal housing, door, and visor, with an infrared, oven- baked, iron- oxide backing primer, conforming to Federal Specification TT -P-1757B and Federal Specification SSPC - Paint 25.
Coat finished surfaces, except the inside of the visor, with infrared, oven baked, highway yellow exterior enamel according to Federal Standard No. 595B. Finish the inside of the visor with phathalic anhydride, black, synthetic baking enamel, with zero gloss reflectance and conforming to MIL-E- 5557 Enamel Heating Resisting Glyceryl Phathalate, Type 4, Instrument Black.
Requests for black traffic signal housing require the approval of the Bureau of Operations . Highway Safety and Traffic Operations Division .
by which opening the door disables the indication.
• One- piece aluminum with a minimum thickness of 0.06 inch.
• Powder coated dull black (Federal Standard 595- 37038) on both the front and back sides.
• Top, bottom, and sides that measure from 5 to 8 - inches in width.
• Rounded outside corners.
• Louvers with no louvers closer than 0.5 inch from the inner edge or 2.5 inches from the outer edge. Orient the louver so it is vertical on sides and horizontal on top and bottom.
• A minimum of four corner mounting attachment points per section head. Ensure attachment points do not interfere with the operation of the section head doors. 955.2(b) 955.2(d) • Passivated stainless -steel type 316 or 304 screws, washers, and other installation hardware required to mount securely.
• Permanently marked manufacturer name, part/model number and date of manufacture on the back side.
• Universal backplates that fit all applicable PennDOT approved products.
• A minimum two inch fluorescent yellow, Type IX retroreflective border, placed flush with the outer edge of the backplate and placed no closer than 0.5-inch from all louvers.
• No sheeting is allowed over an