653Traffic and Street Name Signs

653.01 Description. This work shall consist of furnishing and installing reflectorized

regulatory and warning traffic signs and street name signs as shown on the plans and set forth herein. This specification addresses the minimum requ irements for supplying traffic and street name signs for use with span wire and mast arm mounted traffic signal systems.

653.02 Materials. All materials for traffic and street name signs shall be new and meet

the requirements of Section 721 of the Standard Specifications.

653.02.1 Reflective Sheeting. Reflective sheeting for traffic and street name signs shall

be Type III or Type VII retroreflective sheeti ng. The type and color of reflective sheeting shall be indicated on the plans or set forth herein. 653.02.2--Sign Blanks. Sign blanks shall be flat aluminum sign blanks constructed of 5052-H38 aluminum alloy. Blanks shall be 0.100 inches thick, degreased, deburred, etched and alodine. Sizes shall be as indicated in th e plans for the specific wa rning, regulatory or street name sign called for and to accommodate the various legends.

653.02.3 Sign Faces. All sign faces shall consist of sheeting material and their legends

applied to aluminum blanks specified herein using a heat vacuum method and/or by silk screening the legends only onto the backings and material. The sheeting shall be applied with legends to one side of each warning, regulatory or street name sign as shown on the plans. The color of all faces shall consist of a refl ectorized yellow, red, green or silver-white background with reflectorized black, red or white legend. The legend shall consist of letters and symbols conforming to the design of warning or regulatory signs as shown in the MUTCD and for street name signs as shown on the plans. All letter sizes spacing shall be in acco rdance with FHWA and the manufacturer's recommendations to insure proper legibility with the increased reflectance.

653.03 Construction Requirements. All signs shall be installed in accordance with the

plans and the Manual on Uniform Traffic Control Devices (MUTCD). Signs are to be tilted in order to minimize or eliminate specular reflection.

653.03.1 Warning and Regulatory Signs. Warning and regulatory signs shall be

installed at locations as noted on the plans with the appropriate mounting bracket and banding material.

653.03.2 Street Name Signs. Street name signs shall be installed at locations as noted on

the plans. If installed on mast arms, they shall be attached with at least two mounting brackets and appropriate banding materials.

653.03.3 Washers. Washers, if recommended by the sheeting manufacturer to protect the

sign surface from damage by bolts or other fasteners, shall be furnished by the manufacturer at no additional charge.

653.04 Method of Measurement. Traffic sign and street na me sign of the type specified

will be measured by the square foot, which measurement being inclusive of aluminum sign blank, applied reflective sheeting, mounting brackets and banding materials and begin inclusive of all materials, wo rk and services necessary for a properly constructed sign.

653.05 Basis of Payment. Traffic sign and street name sign, measured as prescribed

above, will be paid for at the contract unit price per square foot, which price shall be full compensation for furnishing the sign and mounting hardware and installing the same on the span wire, signal pole or mast arm, and for all equipment, tools, labor and incidentals necessary to complete the work. Payment will be made under: 653-A: Traffic Sign, Type - per square foot 653-B: Street Name Sign, Type - per square foot SECTION 656--DYNAMIC MESSAGE SIGN

656.01 Description. This work consists of furnishing, installing and integrating a

stationary electronic Dynamic Message Sign (DMS) assembly. The Contractor shall supply a complete operating Light Emitting Diode (LED) sign including the sign housing, sign controller unit (SCU), roadside DMS controller cabinet, all cabling, conduits, electrical service, surge suppression and a ll hardware associated with a complete installation in accordance with these specifications. The DMS assemblies will provide MDOT personn el with a means to visually communicate with motorists regarding incidents, accidents, special events, travel times, etc., that may impact travel on the roadway network.

656.02 Materials.

656.02.1 Types of DMS . Each DMS shall be one of the following types:

DMS Type 1 shall be full a color high resolution matrix sign. The display and pixel spacing shall be capable of displaying three lines of te xt with 21 characters per line such that each character shall each have a nominal height of 18 inches. The pixel pitch shall be 20mm (0.78”) or less. The signs housing shall be a walk-in enclosure. DMS Type 2 shall be a full color high resolution matrix sign. The display and pixel spacing shall be capable of displaying three lines of te xt with 21 characters per line such that each character shall have a nominal height of 18 inches. The pixel pitch shall be 20mm (0.78”) or less. The signs housing shall be either a front access or rear access enclosure. A walk- in enclosure is not required for a Type 2 DMS but is allowed if preferred by the vendor.