608— Supplemental Traffic Control Devices

600-84 Section 608 — Supplemental Traffic Control Devices

608.1 Description 1 Provide, install, and maintain all supplemental traffic control devices. These traffic control devices supplement other traffic control devices and are not intended to function as single entities but in conjunction with other devices. 608.2 Materials 608.2.1 Warning Lights 1 Provide warning lights that are yellow or amber, portable, lens directed, and enclosed. Operate Types A and B lights in the flashing mode and Type C lights in the steady burn mode. Ensure that the lights comply with the MUTCD. Ensure that all warning li ghts, including Types A, B, and C, are lightweight and do not exceed 3.3 lb according to the requirements of NCHRP Report 350 or MASH. 2 When using warning lights that exceed the maximum allowable weight of 3.3 lb, ensure that the lens is detachable to permit placement of the battery pack on the ground or pavement surface while allowing placement of the operating lens at the minimum operating height of 30 in. according to Subsection 608. 3.1. Any portion of a warning light exceeding the maximum allowable weight of 3.3 lb not resting or placed on the ground or pavement surface is prohibited. 3 Do not include warning lights in a category as an individual traffic control device. However, a Category I device supplemented with a warning light becomes a Category II device and requires crash testing to determine the acceptability of the combination of the two traffic control devices. Provide an FHWA letter of acceptance for any Category I traffic control device supplemented with a warning light to ensure the crash worthiness of the combination of the traffic control device and a warning light. 608.2.2 Temporary Glare Shield System 1 Ensure that the temporary glare shield system is modular and consists of base rails, vertical blades, mounting brackets, and hardware. Fabricate the base rail and vertical blades from an impact resistant, non- warping, non- metallic, polymeric material resistant to ultraviolet radiation and temperature. 2 Provide blades that have a width not less than 3 in. or greater than 9 in. and a minimum height of 24 in. Ensure that the blades used on any continuous run have a uniform width and height. Attach the blades to the base rails with brackets to prevent unintentional blade rotation. 3 Provide a base rail containing not less than 3 holes/slots per rail section to provide for zinc plated mechanical anchoring system with a minimum shear strength of 3000 psi.