615TRAFFIC SIGNS

New Hampshire Department of Transportation Standard Specifications – 2016 Description

1.1This work shall consist of furnishing, erecting, relocating or removing traffic signs and sign supports as shown on the plans or

as ordered.

1.2Sign Types.

1.2.1 Traffic Signs Type A and Type AA shall be extruded aluminum plank traffic signs with retroreflective sheeting background and retroreflectorized demountable cut -out copy. Type A shall include W -beam mounts and hard ware as shown on the plans. 1.2.2 Traffic Signs Type B and Type BB shall be flat sheet aluminum signs with retroreflective sheeting background and retroreflectorized cut-out copy or overlay film. Type B shall include aluminum tube mounts or steel “ U” post mounts or as shown on the plans. 1.2.3 Traffic Signs Type C and Type CC shall be flat sheet aluminum signs with retroreflective sheeting background and non-embossed copy unless otherwise shown on plans. Type C signs shall include aluminum tube mounts or steel “ U” post mounts or as shown on the plans. Materials

2.1All parts used in constructing signs shall be designed to withstand a wind loading of 35 pounds per square foot on the sign

surface, unless otherwise noted on the plans.

2.2Plank Signs.

2.2.1 Extruded aluminum planks shall be of the butt type, 6 or 12” wide and of the lengths indicated on the plans. Edge moldings are optional and if furnished shall match the panels and shall have a natural aluminum finish. Aluminum panels shal l conform to the requirements of ASTM B 221, Alloy 6061-T6. Aluminum molding may be of T5 or T6 temper.

2.3Sheet Signs.

2.3.1 Flat aluminum sheets for sheet signs shall be one piece and con form to ASTM B 209 , Alloy 6061-T6 or Alloy 5052- H38. The minimum thickness of the sheets up to 36” wide shall be 0.080” Signs greater than 36” shall be a minimum of 0.100”. 2.3.2 Plywood sheet signs shall be standard form (BB grade or better), minimum 0.5”, exterior type with both faces of medium density overlay (MDO) as described in Voluntary Product Standard “ PS-1-95 Construction and Industrial Plywood”, National Institute of Standards & Technology. The edges of the plywood signs shall be sealed by painting them with a sealer.

2.4Blank.

2.5Vertical Supports.

2.5.1 Steel posts shall conform to ASTM A 36 or ASTM A 572 and unless otherwise shown on the plans, shall be galvanized in accordance with AASHTO M 111 (ASTM A 123). 2.5.1.1 The total maximum weight of steel posts below the hinges of a breakaway support system shall not exceed 45 pounds per foot when 2 posts are to be placed within 7 ft. of each other. 2.5.1.2 Overhead traffic sign structures shall be galvanized steel designed in accordance with 3.4.1. 2.5.2 Aluminum posts for non- breakaway supports shall be of a standard shape aluminum tubing confor ming to ASTM B 221, Alloy 6061-T6 or 6063-T6, as shown on the plans. The wall thickness shall be a minimum of 1/8” and a maximum of 3/16”. 2.5.2.1 Aluminum posts for use with breakaway support systems shall conform to ASTM B 429, Alloy 6061- T6 or 6063- T6, Schedule 40, as shown on the plans. 2.5.3 Steel “ U” posts shall be rail steel conforming to the requirements of ASTM A 499, Grade 60 or ASTM A 576, Grade 1070-1080, minimum yields trength of 60,000 psi. Posts shall be galvani zed in accordance with AASHTO M 111. The weight per foot shall be a minimum of 2 -1/2 lb. and a maximum of 3 lb. The posts shall have 3/8 ” holes drilled or punched, before painting, along the center line of the web. The holes shall begin 1 ” from the top of post and continue at 1” centers for the entire length of the post.

2.6Blank.

2.7Hardware.

2.7.1 Hardware for signs shall conform to the NHDOT Standard Plans.

New Hampshire Department of Transportation Standard Specifications – 2016 2.7.2 The extruded plank post clip assembly shall be stainless steel bolt Alloy 304 ASTM A 193/ASTM A193M Grade B8, stainless steel stop nut Alloy 304 ASTM A-194 Grade 8 with nylon filler and stainless steel M10 flat washer Alloy 302 ASTM – A 276. 2.7.3 The extruded plank attachment assembly shall be stainless steel hex bol t Alloy 304 ASTM A193 Grade B8, stainless steel hex nut Alloy 304 ASTM A-194 Grade 8 and stainless steel M10 flat washer Alloy 302 ASTM-A276. 2.7.4 The bolt assembly for the post clamp shall be stainless steel cap screw Alloy 304 ASTM A193 Grade B8, stainless steel locknut Alloy 304 ASTM A194 Grade 8 with nylon filler and stainless steel M10 flat washer Alloy 302 ASTM-A276. The finish on the clamps shall be Electro-Galvanized clamp. Hardware shall be Unistrut P1120 EG or approved equal. The channel bracket shall be pregalvanized conforming to ASTM D653 G90, and steel conforming to ASTM A653 GR 33 without perforations. Hardware shall be Unistrut P4100 PG or approved equal. 2.7.5 The U-channel post assembly shall be stainless steel hex bol t Alloy 304 ASTM A193 Grade B8, stainless steel M10 fender washer and flat washer Alloy 302 ASTM-A276, a nylon washer, and stainless steel locknut Alloy 304 ASTM A194 Grade 8 with nylon filler.

2.8Supports, Bases, and Anchors.

2.8.1 Breakaway support systems shall conform to the AASHTO “ Standard Specifications for Structural Supports for Highway Traffic Signs, Luminaires and Traffic Signals” as shown on the plans. 2.8.2 Concrete for bases shall be Class B and shall conform to Section 520. Reinforcing steel shall conform to Section 544 .

2.8.3 Anchor bolts for overhead sign structure shall be steel conforming to AASHTO M 314, Grade 36, 55 or 105 and shall be hot-dip galvanized for a minimum of 16” on the threaded end in accordance with AASHTO M 232, Class C. Nuts shall conform to AASHTO M 291 . Washers shall conform to AASHTO M 293. Nuts and washers shall be galvanized in accordance with AASHTO M 232, Class C or AASHTO M298, Class 50. 2.8.4 Anchors for aluminum posts shall conform to the materials shown in the NHDOT Standard Plans. 2.8.5 Anchors for breakaway systems for ground-mounted sign supports shall be stainless steel Type 304 in accordance with ASTM A 276. Anchor bolts for breakaway systems shall be steel in accordance with AASHTO M 164 , galvanized in accordance with AASHTO M 232, Class C or AASHTO M 298, Class 50.

2.9Copy (Text and Borders).

2.9.1 General. 2.9.1.1 The design, arrangement, color, and spacing of copy shall be as shown on the plans, in the MUTCD and the Standard Highway Signs book. 2.9.1.2 There shall be no gaps in the borders of the signs. 2.9.1.3 Demountable sign copy shall conform to ASTM B 209, Alloy 3003- H14. The minimum thickness of flat sheet aluminum shall be 0.032”. 2.9.2 Copy for Type A, and Type AA Signs. 2.9.2.1 The letters, numerals, symbols, shields, and borders of retroreflective sheeting permanently adhered to flat sheet aluminum backing shall be adhesive coated retroreflective sheeting conforming to 718 Retroreflective Sheeting. 2.9.2.2 Spacing of mounting holes for demountable copy shall be determined by character size and shape, but in no case shall be more than 8” on center. 2.9.3 Copy for Type B and Type BB Signs. 2.9.3.1 The letters, nume rals, symbols, shields, and borders of retroreflective sheeting shall be cut -out adhesive coated retroreflective sheeting conforming to 718 Retroreflective Sheeting. 2.9.4 Copy for Type C and Type CC Signs. 2.9.4.1 Copy for Type C and Type CC signs shall be cut-out or silk screened. Cut –out copy or ink for the silk screened shall be approved by background retroreflective sheeting manufacturer for use on its sheeting.

2.10Background.

2.10.1 Type A, AA, B, C and CC signs. 2.10.1.1 All background sheeting shall be retroreflective sheeting confo rming to 718 Retroreflective Sheeting . Visual inspections to assure that sheeting meets the specified requirements may be made by the Engineer at any time prior to acceptance.

New Hampshire Department of Transportation Standard Specifications – 2016 2.10.1.2 Certificates of Compliance for all sheeting materials shall be furnished in accordance with 106.04 and Section 718. Construction Requirements

3.1General.

3.1.1 The plans will show cross sections of the highway in the area of overhead structures, the dimensions of the signs to be mounted, and the approximate locations, but the exact locations shall be as determined by the Engineer. 3.1.2 The length of vertical supports may vary from the plan length to fit the final designed sign location and the Contractor is cautioned to take this contingency into account. 3.1.3 Traffic sign details not shown on the plans shall conform to the MUTCD and Standard Highway Signs book. Traffic sign supports and framing members shall be in accordance with the AASHTO “ Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals”.

3.2Manufacture and Assembly.

3.2.1 Preparation of planks. Prior to application of the retroreflective sheeting, planks shall have been completely fabricated with all necessary holes drilled or punched. The planks shall be carefully and thoroughly degreased and dried in accordance with the sheeting manufacturer’s recommended practice. 3.2.2 Preparation of aluminum sheets. Prior to the application of the retroreflective sheeting, the aluminum sheets shall be one piece except as indicated in 3.2.2.2 and have been cut to the required sizes, with the corners at the prescribed radii, wit h true and smooth edges, and shall be free of burrs or ragged breaks. 3.2.2.1 The aluminum shall be properly degreased and etched or treated in accordance with ASTM B 449, Class 2. 3.2.3 The retroreflective sheeting shall be of the colors provided in the MUTCD, Standard Highway Signs book, NHDOT Standard Plans or as shown on the plans. 3.2.4 The Contractor shall submit drawings for approval showing arrangements, spacing, radii, border widths, indent spacing and colors of copy and type of retroreflective sheeting in accordance with 105.02. 3.2.5 Application of retroreflective sheeting to aluminum plank. The sheeting shall be applied to the face of the extruded aluminum planks by a squeeze roller applicator in accordance with the recommendations of the sheeting manufacturer. The face of the planks shall be completely covered by the retroreflective sheeting. Borders of pressure-sensitive adhesive type retroreflective sheeting shall be applied by means of a 2” rubber hand roller as recommended by the sheeting manufacturer. All signs shall contain the date of manufacture and size, located in the lower left corner of the front face of the sign (i.e. 3-90 10’x15’). Letters and numbers shall be 2” non-reflective white adhesive pressure copy. 3.2.5.1 Whenever a sign face comprises two or more p ieces of retroreflective sheeting, they shall be carefully matched for color at the time of sign fabrication to provide uniform appearance and brilliance both day and night, and shall have a minimum overlap of 3”. Alternate, successive width sections of either sheeting or planks shall be reversed and placed consecutively to ensure that corresponding edges of retroreflective sheeting lie adjacent on the finished sign. 3.2.6 Application of retroreflective sheeting to aluminum sheets. The sheets shall conform to the provisions of aluminum plank except that the sheeting shall be applied to the aluminum either by the heat vacuum applicator method or by mechanical roller application in accordance with the recommendations of the sheeting manufacturer and shall ha ve a minimum overlap of 1 ” with the top sheeting overlapping the bottom sheeting. All Type B signs shall contain the date of manufacture and size, located in the lower left corner of the front face of the sign (i.e. 3-90 10’x15’). Letters and numbers shall be 1” non-reflective white adhesive pressure copy. All Type C signs shall contain a legible size and date of manufacture, located in the lower right corner on the back of the sign, applied with permanent marker or paint (i.e. 9-04, 3’x3’). 3.2.7 Application of Sign Copy. 3.2.7.1 Application of copy for Type A and Type AA shall be retroreflectorized demountable sign copy and shall be applied to the panels by using aluminum rivets or aluminum alloy sheet metal screws conforming to ASTM B 211 , Alloy 2024. Screws and rivets are to be the same color as the sign copy. Silver can be used for white sheeting. 3.2.7.2 Application of copy for Type B and Type BB traffic signs shall be adhesive back pressure sensitive cut –out copy applied by a roller application (hand or machine). 3.2.7.3 Application of copy for Type C and Type CC traffic signs shall be cut-out or silk screened as specified by the sheeting manufacturer. Non-adhesive cut-out copy shall be bonded to the sign surface by the heat vacuum applicator m ethod. 3.2.8 Appearance. Any damage to the retroreflective sheeting appearing in the completed sign shall be cause for rejection. Patching will not be permitted.

New Hampshire Department of Transportation Standard Specifications – 2016

3.3Installation of Traffic Signs.

3.3.1 The top edges of all signs shall be horizontal. An y chipping or bending of sign panels shall be cause for replacement at the Contractor’s expense. 3.3.2 Ground-mounted signs in most cases should be erected to face 2 degrees away from the direction of approaching traffic. Ground mounted signs on curves or steep grades may need to be adjusted to maximize retroreflectivity. Overhead mounted signs shall be erected to face downward 5 degrees from vertical. 3.3.3 The minimum sign height for a conventional road in a rural district shall be 6 feet. All other si gn heights shall be in accordance with the MUTCD or NHDOT Standard Plans. 3.3.4 When two (2) or more signs are installed on the same supports, the signs shall be butted together unless otherwise specified on the plans or MUTCD. There shall be no gaps between the signs.

3.4Overhead Traffic Sign Structures.

3.4.1 Overhead sign structures shall be designed and installed in accordance with the AASHTO “ Standard Specifications for Structural Sup ports for Highway Traffic Signs, Luminaires and Traffic Signals ” including all interims except as modified herein. Refer to a Special Provision, Amendment to Section 615, for the design of cantilever and full -span overhead traffic sign structures with emphasis on the installation procedures for anchor rods. Structures shall be designed to accommodate sign surface areas of 30 percent greater than those shown on the plans. Sign structures shall be designed based on the following criteria: Basic Wind Speed: 100 mph Design Life: 50 Years Fatigue Importance Category: Category II (Category I for cantilever sign structures, span >30') Natural Wind Gust Loading, Galloping loads (except for cantilevered four chord trusses), and Truck Induced Gust Loading shall be considered. Vortex shedding effects do not need to be considered. Overhead signs shall provide a vertical clearance of not less than 17 ft. – 6” over the entire width of the pavement and shoulders. Three (3) foot interior walkways, with OSHA approved railing, shall be provided for access to the back side of variable or dynamic message signs on overhead sign structures. For full overhead traffic sign structures the anchor bolt size and pat tern shall be identical for both bases. 3.4.1.1 The Contractor shall furnish the design calculations and complete shop drawings, or manufacturer's standard specifications and drawings, or both for the overhead structure proposed to be erected, including method of attaching signs t o the structure for documentation in accordance with 105.02. The Contractor shall also supply, along with any pertinent design calculations, a list of the following forces and offsets: Load Source: Resultant Loading of Load Source: Horizontal and Vertical Offset From Top of Foundation to Resultant Loading: Truss or Cantilever Dead Load Sign(s) Dead Load Post(s) Dead Load Wind Load on the Horizontal Sign Support Wind Load on the Sign(s) Wind Load on the Post(s) Ice Load on the Horizontal Sign Support Ice Load on the Sign(s) Details of foundations for overhead structures will be furnished to the Contractor after submittal of the shop drawings. 3.4.2 Triangular truss type overhead traffic sign structures shall not be permitted. 3.4.3 Concrete shall be constructed in accordance with Section 520. Reinforcing steel shall be constructed in accordance with Section 544.

New Hampshire Department of Transportation Standard Specifications – 2016 3.4.4 Backfill shall be constructed in accordance with Sections 209 or 508 as called for on the plans. 3.4.5 Supporting columns shall not be mounted on the leveling nuts until the concrete has cured for at least 7 days or attained a minimum of at least 80 percent of its design compressive strength. 3.4.6 When the sign panels are not to be installed immediately upon completion of the structure, an equivalent loading of the structure shall be provided. 3.4.7 Sign mounting brackets shall be attached to the structure utilizing only bolted connections, which allow complete lateral and vertical adjustment of the sign over the roadway. 3.4.8 The applicable provisions of 550.3 shall apply to sign structures. 3.4.9 When overhead sign structures are ordered removed or relocated, the entire structure, mounting brackets, signs, and bases down to 1 foot below final ground level, shall be removed. Unless otherwise shown on the plans, the structure removed shall become the property of the Contractor. 3.4.10 Sheeting and shoring, if required, shall conform to the applicable provisions of Sections 503 and 506, as appropriate.

3.5Traffic Signs Type A.

3.5.1 The posts for traffic sign mounts shall be set in the foundation holes and securely held in place by a brace or template before the concrete for the base is placed. All posts shall be plumb and properly oriented with the roadway. Flanges supporting a single sign will lie in the same plane. 3.5.1.1 The forms and templates supporting the posts shall not be removed until the concrete has cured at least 24 hours. No sign shall be attached to the posts until the concrete has cured as provided in 3.4.5. 3.5.2 After erection, all bare steel shall be thoroughly wire brushed or power -tool cleaned and covered with 2 coats of approved zinc-rich primer. The first coat shall be thoroughly dry before the second coat is applied. 3.5.3 When rock is encountered in erecting posts, the depth to be drilled into the rock and any required grouting shall be as directed and subsidiary to the item. 3.5.4 Sign panels shall be mounted horizontally on the posts as shown on the plans. The back of the pane ls shall be flush with the posts after the mounting is completed. 3.5.5 When Type A signs are ordered removed, the entire assembly including the footings down to 1 ft. below ground level shall be removed. Unless otherwise shown on the plans, the steel and sign panels shall become the property of the Contractor. 3.5.6 When Type A signs are ordered relocated, new steel posts and all necessary mounting hardware shall be provided unless otherwise shown on the plans. Unless otherwise shown on the plans, removed steel shall become the property of the Contractor. 3.5.7 When Type AA bridge mounted signs are ordered to be removed, the bolt holes shall be filled and/or painted as directed. Unless otherwise shown on the plans, the steel and sign panels shall become the property of the Contractor. 3.5.8 When Type AA signs are ordered to be relocated, all new mounting hardware shall be included to attach to existing structures on posts. Bridge mounted structures and overhead structures’ vertical support braces shall be trimmed to match signs.

3.6Traffic Signs Type B and C.

3.6.1 Aluminum posts shall be set in holes excavated to the proper depth. The anchors shall be constructed as shown on the plans. After inserting posts, the holes shall be backfilled with granular material placed in thoroughly compacted layers not exceeding 6” in depth, care being taken to preserve the alignment of the posts. When more than one post per sign is required, the posts shall be parallel and plumb. Posts bent or otherwise damaged shall be removed and replaced. 3.6.2 Steel “ U” posts may be set as specified in 3.6.1 or driven. 3.6.2.1 When posts are driven, a suitable driving cap shall be used. Battered heads will not be accepted. Posts shall not be driven with the assembly or sign attached. 3.6.3 When rock is encountered in erecting posts, the depth to be drilled into the rock and any required grouting shall be as directed and subsidiary to the item. 3.6.4 When Type B or C signs are ordered removed, the sign and posts shall become th e property of the Contractor , unless otherwise shown on the plans. Any existing concrete foundation shall be removed down to 1 ft. below final grade elevation. 3.6.5 When Type B or C signs are ordered relocated, new posts and all necessary mounting hardwar e, including breakaway bases if required, shall be provided.

New Hampshire Department of Transportation Standard Specifications – 2016 Method of Measurement

4.1Overhead traffic sign structures including bridge mounts will be measured as a unit. When more than one unit is specified

in the Contract, separate item numbers will appear for each separate unit. 4.1.1 Removing overhead traffic sign structures will be measured as a unit, including the removal of the signs and sign bases as shown or ordered. 4.1.2 Relocating overhead traffic sign structures will be measured as a unit, in cluding new anchor bolts and the removal of existing sign bases as shown or ordered.

4.2Traffic sign Type A, B, Cwill not be measured, but shall be the square foot final pay quantities in accordance with 109.11

for traffic signs required as shown on the plans, including all necessary posts, footings, bases, and mounting hardware.

4.3Traffic sign Type AA, BB or CC will not be measured, but shall be the square foot final pay quantities in accordance with

109.11for traffic signs required as shown on the plans, including all necessary mounting hardware

4.4Removing traffic sign Type A or AA will be measured as a unit. A unit will include all footings to a minimum of 1 ft. below

finished grade, posts, mounting hardware including bridge mounts, and all signs on the same post.

4.5Removing traffic signs Type B, C, BB or CC shall be subsidiary unless otherwise noted. Removal will include all footings

(to a minimum of one foot below finished grade, posts, mounting hardware and all signs on each post.

4.6Relocating traffic sign Type A, B, C, AA, BB or CC will be measured as a unit. A unit will include removing footings and

posts, furnishing new footings, posts and mounting hardware, trimming existing bridge mounted structures and overhead structural vertical support braces, and erection of all signs on the new post(s). Basis of Payment

5.1Overhead traffic sign structures will be paid at the Contract lump sum price complete in place with the following stipulations:

5.1.1 Structure excavation for bases will be paid under Section 206. 5.1.2 Concrete required will be paid under Section 520. 5.1.3 Reinforcing steel required will be paid under Section 544. 5.1.4 Overhead traffic sign structures removed or relocated will be paid at the Contract lump sum price. 5.1.5 Sheeting and shoring for sign structures will be paid for under the appropriate items of Sections 503 and 506 as indicated on the plans. When not included as a bid item this work will be subsidiary to the structure item.

5.2Traffic signs type A, B, C, AA, BB or CC are final pay quantity items and will be paid for at the Contract unit price per

square foot complete in place in accordance with 109.11. 5.2.1 The accepted quantities of removing traffic sign Type A or AA or relocating traffic sign Type A, B, C, AA, BB or CC will be paid for at the Contract unit price per each unit. Pay items and units:

615.002 Breakaway Mounts Unit

71 Steel Sign Posts Pound

72 Steel Breakaway Sign Posts Pound

73 Aluminum Sign Posts Pound

KEY TO ITEM NUMBERS FOR SIGN STRUCTURES AND SIGNS Item Number Unit .A B C DE Item Number Section Number .A Class of Structure B Sign Type C Treatment DE Identification or Location Number

New Hampshire Department of Transportation Standard Specifications – 2016 A Class of Structure Unit .0 Sign Post Unit .1 Full Traffic Sign Structure Unit .2 Cantilever Traffic Sign Structure Unit .3 Bridge Mounted Traffic Sign Structure Unit .4 Span Wire Traffic Sign Structure Unit B Sign Type .01 Traffic Sign Type A Square Foot .02 Traffic Sign Type B Square Foot .03 Traffic Sign Type C Square Foot .04 Traffic Sign Type AA Square Foot .05 Traffic Sign Type BB Square Foot .06 Traffic Sign Type CC Square Foot C Treatment .--1 Open .--2 Breakaway Mounts Unit .--3 Removing Unit .--4 Relocating Unit .--5 On Existing Facilities .--6 On New Facilities .--8 Reset DE Identification and Location .---01 .---99

615.01Traffic Sign Type A (F) Square Foot

2 Traffic Sign Type A, Breakaway Mounts (F) Square Foot

3 Removing Traffic Sign Type A Unit

4 Relocating Traffic Sign Type A Unit

615.02Traffic Sign Type B (F) Square Foot

2 Traffic Sign Type B, Breakaway Mounts (F) Square Foot

4 Relocating Traffic Sign Type B Unit

615.03Traffic Sign Type C (F) Square Foot

2 Traffic Sign Type C, Breakaway Mounts (F) Square Foot

4 Relocating Traffic Sign Type C Unit

615.04Traffic Sign Type AA (F) Square Foot

3 Removing Traffic Sign Type AA Unit

4 Relocating Traffic Sign Type AA Unit

615.05Traffic Sign Type BB (F) Square Foot

4 Relocating Traffic Sign Type BB Unit

615.06Traffic Sign Type CC (F) Square Foot

4 Relocating Traffic Sign Type CC Unit

615.1000X Full Traffic Sign Structure Unit

615.2000X Cantilever Traffic Sign Structure Unit

615.3000X Bridge Mounted Traffic Sign Structure Unit

30X Removing Bridge Mounted Traffic Sign Structure Unit

80X Reset Bridge Mounted Traffic Sign Structure Unit

615.4000X Span Wire Traffic Sign Structure Unit

301 Removing Span Wire Sign Structure Unit

401 Relocating Span Wire Sign Structure Unit

New Hampshire Department of Transportation Standard Specifications – 2016

Description

This work shall consist of furnishing and installing traffic signals, pedestrian signals, or flashing beacons including poles,

mast arms, foundations, backfill, and all necessary fittings, cables, and components as ordered.

Traffic signal terms shall be in accordance with those defined in the MUTCD.

Materials

A list of the recommended materials required to install the system may be included as an amendment to this specification,

but the Department will give no guarantee as to the completeness of this list. 2.1.1 Electrical materials shall meet the standards herein, local and utility codes, and the National Electrical Code, where applicable. 2.1.2 Drawings, manufacturer's specifications, and applicable catalog cuts for all materials and components shall be submitted in accordance with 105.02 within 21 days after award of the Contract. An additional set of final approved documents, to total 6 sets, shall be supplied to the Engineer.

Traffic Signal Heads.

2.2.1 Housings. Housings shall be constructed of die cast aluminum or polycarbonate with a smooth outer surface and shall be capable of holding the optical units securely in place. Housings shall be adaptable for pedestal, bracket, or rigid mast arm vertical or horizontal mounting. The assembled housing shall be dust proof and moisture proof. Each housing shall be equipped with a hinged door of die cast aluminum or polycarbonate to hold the lens and parts of the optical units. The doors shall be designed to ensure uniform pressure around the doorframe when closed. Doors shall be fastened by hinged wing nut assemblies or other approved fasteners. Unless otherwise indicated on the plans, lenses shall be furnished with approved tunnel viso rs (not less than 10” ). If either longer visors than those specified above or louvers are deemed necessary, they shall be furnished and installed. All traffic signals shall be furnished with a 5 ” backplate. Backplates shall be louvered aluminum coated flat black, be fastened with stainless steel hex head slotted screws and a 3/16” by 3/4” stainless steel fender washer. 2.2.1.1 The assembled housings shall be made up of individual sections fastened together with bolts. The assembly of sectional units shall present a smooth unb roken contour of pleasing appearance. Each end of the housing assembly shall have an opening for a 1-1/2” pipe nipple. The area around this opening shall be reinforced and serrated so that lock nuts will seat firmly. 2.2.1.2 One cap shall be supplied wit h each assembled housing to act as a cover over the hole in the top to prevent water from entering. 2.2.2 Housing adapters. Housing adapters for pedestal mounting shall be constructed of cast iron. They shall be adjustable with serrated surfaces to permi t the housing to be locked in the desired horizontal position. The adapters shall be secured to the bottom of the housing by means of a close nipple, shall slip fit at least 7 ” over a standard traffic signal post 4 ” in diameter, and shall be secured to th e post by a minimum of four set screws. Adapters shall contain raceways from the housing to the post to protect the wires from the elements. 2.2.3 Mast arm brackets. Mast arm brackets shall be banded (not cabled) as indicated in the recommended list of materials shown in the proposal. 2.2.4 Lamps. LED lamps shall have a regulated power supply designed to electrically protect the diodes. The lamp shall be water tight and sealed to eliminate contaminants. The lamp shall be capable of operating at ambient air temperatures of -40° F to 140° F. 2.2.4.1 Each LED module shall be wired with two leads which shall terminate at the terminal block in each signal head. Separate leads shall be used to wire the block to the base. Leads shall be 18 AWG stranded wire. All colors shall be bright and clearly defined and cover the insulation the entire length of the lead. The color of these leads shall be as follows:

2.2.5 Optics. LED lamp life shall be a minimum of 100,000 hours of continuous operation. Power consumption for 12” indications including power supply shall not exceed 20 W and have an initial output of 1900- limens. 2.2.5.1 LED modules shall conform to the standards set forth by the Institute of Transportation Engineers and shall be of the color indicated, circular in shape, with a visible diameter of approximately 12”.