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General Provisions (00100-00999)

646through 651 VACANT

ME · 2020 Standard SpecificationsBook pages 617619View official source ↗

R o u t e A s s e m b l y S i gn, Type I

645.281 5 Inch Aluminum Pole E a c h

2 6 Inch Aluminum Pole E a c h

3 7 Inch Aluminum Pole E a c h

4 8 Inch Aluminum Pole E a c h

5 10 Inch Aluminum Pole E a c h

6 12 Inch Aluminum Pole E a c h

9 Steel H-Beam Poles P ounds

645.291 Roadside Guide Signs Type II S q u a r e F o o t

2 Regulatory, Warning, Confirmation and S q u a r e F o o t

Route Marker Assembly Signs Type II

645.301 Demountable Reflectorized Delineator, Single Each 645.302 Demountable Reflectorized Delineator, Double Each 645.305 Sign Mounted Beacon Array L u m p S u m

SECTION 652 — MAINTENANCE OF TRAFFIC

652.1Description This work shall consist of furnishing, insta lling, maintaining and

removing traffic control devi ces necessary to provide reasonabl e protection for motorists, pedestrians and construction workers in accordance with theseS pecifications, the applicable provisions of Section 105.4.5 – Maintenance of Existing Structuures. Traffic control devices include signs, signals, lighting devices, markings, barricades, channelizing, and hand signaling de vices, traffic officers, and flaggers.

652.2Materials All traffic control devices shall conform to t he requirements of Part VI

of the latest edition of the MUTCD, and MASH 16 guidelines. All signs shall be fabricated with high intensity fluorescent r etroreflective sheeting conforming to ASTM D 4956 - Type VIII, or Type IX (prismatic). All barricades, drums, and vertical panel markers shall be fabricated with high intens ity orange and white fluorescent retroreflective sheeting conforming ASTM D 4956 - T ype VII, Type VIII, or Type IX (prismatic). Construction signs shall be fabricated from materials that are flat, free from defects, retroreflectorized, and of suffi cient strength to withstand def lections using a wind speed of 80 miles/hr. All barricades, cones, drums, and construction signs may be con structed from new or recycled plastic.

652.2.2 Signs Only signs with symbol messages conforming to th e design of the Manual of Uniform Traffic Control Devices shall be used unless the Res ident approves the substitution of word messages. 652.2.3 Flashing Arrow Boardss Flashing Arrows must be of a ty pe that has been submitted to AASHTO’s National Transportation Product Evaluatio n Program (NTPEP) for evaluation. Flashing Arrow Boards units shall meet requirements of the curr ent Manual on Uniform Traffic Control Devices (MUTCD) for Type “C” as described in Se ction 6F.56 - Temporary Traffic Control Devices. A Flashing Arrow Board shall have matr ix of a minimum of 15 low-glare, sealed beam, Par 46 elements capable of either flashing or sequential displays as well as the various operating modes as described in the MUTCD, Chapter 6-F. If a flashing Arrow Board consisting of a bulb matrix is used, each elements hould be recess-mounted or equipped with an upper hood of not less than 180 degrees. The c olor presented by the elements shall be yellow. Flashing Arrow Boards elements shall be capable of at least a 5 0 percent dimming from full brilliance. Full brilliance should be used for daytime ope ration and the dimmed mode shall be used for nighttime operation. Flashing Arrow Boards sh all be at least 96 inches x 48 inches and finished in non-reflective black. The Flashing Arrow Boards shall be interpretable for a distance not less than 1 mile. Operating modes shall include, flashing arrow, sequential arrow , sequential chevron, flashing double arrow, and flashing caution. In the three arrow signals, the second light from the arrow point shall not operate. The minimum element on-time shall be 50 percent for the flashin g mode, with equal intervals of 25 percent for each sequential phase. The flashing rate shall be not less than 25 nor more than 40 flashes per minute. All on-board circuitry sha ll be solid state. Primary power source shall be 12 volt solar with a battery back -up to provide continuous operation when failure of the primary power source occurs, up t o 30 days with fully charged batteries. Batteries must be capable of being charged from an o nboard 110 volt AC power source and the unit shall be equipped with a cable for this pur pose. Controller and battery compartments shall be enclosed in lockable, weather-tight boxes. The Flashing Arrow Boards shall be mounted on a pneumatic-tired trailer or other suitable support for hauling to various locations, as directed. The minimum mounting height of an arrow panel should be 7 feet from the roadway to the bott om of the Flashing Arrow Boards. The face of the trailer shall be delineated on a permanent basis by affixing retro- reflective material, known as conspicuity material, in a contin uous line as seen by oncoming drivers.

A portable changeable message sign may be used to simulate an a rrow panel display. 652.2.4 Other Devices Vertical panel markers shall be orange a nd white striped, 8 inches wide by 24 inches high. On the Interstate System, verti cal panel markers shall be orange and white striped, 12 inches wide by 36 inches high. Cones shall be orange in color, at least 28 inches high, and re tro-reflectorized. Retro- reflection shall be provided by a white band of retro-reflectiv e sheeting conforming to Section 719.01, 6 inches wide, no more than 3 to 4 inches from the top of the cone, and a 4 inch wide white band at least 2 inches below the 6 inch band. Drums shall be of plastic or other yielding material, and shall be approximately 36 inches high and a minimum of 18 inches in diameter. There shal l be at least two retro- reflectorized orange and at least two retro-reflectorized white stripes at least 4 inches wide on each drum. Metal drums shall not be used. Warning lights and battery operated flashing and steady burn li ghts shall conform to the requirements Section 712.23 - Flashing Lights. Flaggers shall use a STOP / SLOW hand held paddle as the primar y and preferred hand signaling device. Flags shall only be limited to emergencies. STOP / SLOW paddles shall have high intensity prismatic retro r eflective sheeting, have an octagonal shape on a rigid handle and shall be at least 18 i nches wide with letters at least 6 inches high and shall be constructed from light semi-rigid ma terial. The STOP (R1-1) face shall have white letters and a white border on a red background . The SLOW (W20-8) face shall have black letters and a black border on an orange backgr ound. STOP / SLOW paddles shall also incorporate either white or red flashing lights on the STOP face and white or yellow flashing lights on the SLOW face of the paddle and always be in use. Paddles must conform to any of the following patterns: A. Two white or red lights (colors shall be all white or all re d), one centered vertically above and one centered vertically below the STOP legend; and/or two white or yellow lights (colors shall be all white or all yellow), onece ntered vertically above and one centered vertically below the SLOW legend;

B.Two white or red lights (colors shall be all white or all re d), one centered horizontally

on each side of the STOP legend; and/or two white or yellow lig hts (colors shall be all white or all yellow), one centered horizontally on each sid e of the SLOW legend;

C.One white or red light centered below the STOP legend; and/o r one white or yellow

light centered below the SLOW legend;

Source: Maine Standard Specifications for Road and Bridge Construction, 2020 Edition. Pages 617619 of 817.