731TRAFFIC COUNTING EQUIPMENT

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731.04Guarantee

The Contractor shall guarantee all work performed under this Section, against defective materials and workmanship for a period of six (6) months after the final acceptance of the project. The Contractor shall replace materials and workmanship found defective during the guarantee period at no cost to the State.

731.05Submittals

The contractor shall transmit Material Submittals in accordance with Subarticle 105.02(d) “Submittals for Traffic Design”. Submittals shall consist of material and equipment listings along with supporting documentation as specified in Item 105.02(d)1 “Preparation of Submittals” and these specifications. Structural components, such as Signal Poles and Luminaire Extension Arms, shall be submitted in accordance with Section 718 and Subarticle 105.02(c) “Working Drawings”. Material Submittals for this specification section “Traffic Counting Equipment” shall be transmitted to the designated Working Group: Design Bureau’s Traffic Engineering Division for their review and approval. The Working Group’s email address is TrafficDesignSubmittals@dot.state.al.us.

731.06Traffic Counting Unit Types

There are several different types of traffic counting units, based on configuration, layout, and equipment. The following are the different types that could be used: Type A: 2-Lane roadway, 1-direction, cabinet & solar panel installed on 12’ pedestal pole, on outside shoulder. Type B: 3-Lane roadway, 1-direction, cabinet & solar panel installed on 12’ pedestal pole, on outside shoulder. Type E: 6-Lane roadway, 2-direction, 3-lanes each direction, cabinet & solar panel installed on 12’ pedestal pole, in median. Type H: 6-Lane roadway w/median barrier wall, 2-direction, 3-lanes each direction, 1-cabinet & solar panel installed on 12’ pedestal pole, for each direction on shoulder. Type K: 4-Lane roadway, 2-direction, 2-lanes each direction, cabinet & solar panel installed on 12’ pedestal pole, in median. Type L: 4-Lane roadway, 2-direction, 2-lanes each direction, cabinet & solar panel installed on 12’ pedestal pole, on outside shoulder. Type R: 2-Lane roadway, 2-direction, 1-lane each direction, cabinet & solar panel installed on 12’ pedestal pole, on shoulder. TypeS: 5-Lane roadway including Two-Way-Left-Turn-Lane (TWLTL), 2-direction, 2 each lane and in TWLTL, cabinet & solar panel installed on 12’ pedestal pole, on shoulder. Type POD: In-roadway sensors each lane, receivers, solar panel, & cabinet installed on pole on the shoulder/median, depending on roadway configuration. Type SFR: Radar head, solar panel, & cabinet installed on pole on the shoulder. Type VID: AI video system with camera, cabinet, and solar panel on pole on the shoulder.

731.07Method of Measurement

Furnishing and installing of traffic counting equipment when so scheduled on the plans or proposal shall be measured in complete units in accordance with the following: Each complete operational traffic counting facility will be measured separately with single locations classified as units. Poles for mounting traffic detection equipment will be measured per each pole.

731.08Basis of Payment

The accepted work of furnishing and installing the traffic counting units measured as noted above, shall be paid for at the contract price bid per each, which shall be full compensation for the furnishing of the traffic counting unit terminal strip enclosure, conduit, encasing, grounding materials, loop wire and sealant, and all incidentals necessary for furnishing in accordance with plan details; and for all tools, equipment, labor to complete the installation. Each pole for mounting traffic detection equipment will be paid for at the contract unit price which shall be full compensation for all materials tools and labor required for the design, fabrication and installation of the pole. The contract unit price shall also be full compensation for the foundation and all appurtenances shown to be required on the plans. Compensation for the pole will be adjusted in accordance with the cost adjustments listed in Section 730.05 for changes to the size of the pole foundation. TRAFFIC CONTROL DEVICES FOR CONSTRUCTION WORK ZONES 641

731-A Traffic Counting Units, Type __*__ per Each 731-B Pole for Mounting Traffic Detection Equipment - per Each * Specify Type (See Article 731.06) TRAFFIC CONTROL DEVICES FOR CONSTRUCTION WORK ZONES

740.01Description

This Section shall cover the work of furnishing, erecting, lighting as directed, handling and maintaining all construction signs (warning, regulatory and guide), barricades and other traffic control devices installed at locations specified by plan details, directed or approved by the Engineer for the purpose of handling traffic safely through construction work zones. The traffic control devices covered by this Section shall meet the requirements specified in the MUTCD and as detailed on the plans. In case of conflict or discrepancy, the plans shall govern over the MUTCD. This Section shall also cover the work of furnishing and operating pilot cars and furnishing flaggers to control traffic at such locations and for such periods as are necessary to handle traffic safely through construction work zones.

740.02Materials

All signs, barricades, markers, lights and other devices shall be approved for use in highway construction under the provisions of Section 32-5A-36 of the Alabama Code prior to their installation. The Department has established List IV-3, Work Zone Traffic Control Devices and List V-1, Reflective Sheeting for Traffic Control. Devices shown on these lists and devices shown on the plans will be the only devices accepted for use. These lists are in the Department’s MSDSAR manual. Information concerning these lists are given in Subarticle 106.01(f) and ALDOT-355. Portable rumble strips shall be selected from the Department’s List IV-4, MISCELLANEOUS TRAFFIC CONTROL DEVICES. The list is in the MSDSAR manual.

The Contractor shall be responsible for ensuring that all devices that are used for work zone traffic control meet "crashworthy" requirements given in the National Cooperative Highway Research Program

of device.

Category 1 Work Zone Devices are small, lightweight devices (including cones, plastic drums, flexible delineators, portable rumble strips, etc.) that are known to be crashworthy either by crash testing or by years of demonstrable safe performance.

Category 2 Work Zone Devices are small, lightweight devices (including barricades, sign supports, etc.) that will not produce significant velocity change when struck but may otherwise be potentially hazardous. All Category 2 devices shall be crashworthy as detailed in 740.02(b)

Category 3 Work Zone Devices are truck mounted impact attenuators, work zone impact attenuators, and portable concrete barriers. All impact attenuators shall be crashworthy. Portable concrete barriers that were fabricated in accordance with the details shown on Sheet 1 of ALDOT Special Drawing – 350, TL-3 Previously Cast Concrete Barrier – Type 6 (Portable) and have "ALDOT 350-TL" cast into the top of the rails are crashworthy and are acceptable for installation. Other types of portable concrete barrier rails may be used with the written approval of the Construction Engineer. TRAFFIC CONTROL DEVICES FOR CONSTRUCTION WORK ZONES 642

Category 4 Work Zone Devices are large trailer mounted devices such as sequential arrow boards and changeable message signs. Standards for rating Category 4 devices as "crashworthy" have not been developed.

Materials used in the fabrication, construction and installation of the construction signs, barricades and other devices shall conform to the requirements of Article 104.04, plan details, the MUTCD and the details noted in this Section: Sign panels may be fabricated from one of the types of material shown below: Material Min. Panel Thickness * Sign Face Area Aluminum Flat Sheets 0.080 inches {2.00 mm} All sizes Aluminum Composite 0.080 inches {2.00 mm} All sizes ** Roll Up Sign N/A All sizes * NOTE: Any sign panel installation using Standard Mounting procedures, which in the opinion of the Engineer does not provide a reasonably rigid sign installation, shall be strengthened by the use of additional supports and/or backing stringers. ** NOTE: The Department has established List V-1, REFLECTIVE SHEETING FOR TRAFFIC CONTROL. Devices shown on this list and devices shown on the plans will be the only devices accepted for use. The list is in the MSDSAR manual. Sign background and messages shall be formed using materials noted for such in Articles 880.02 and 880.03. To permit visual verification of proper use, each type sheeting shall display an identifiable symbol, on the face of the sheeting, in a repeat pattern. When no pre-requirements are specified for units, they shall comply with the manufacturer's specifications as approved by the Department under the provisions of Section 32-5-36 of the Alabama Code. Items are not required to be new. Used items may be acceptable provided the following conditions are met:  Units are in good repair, clean and structurally sound.  Reflective sheeting on any unit is clean and in good repair.  All legends and messages are sharp, clean and legible.  Reflectivity of said units during the hours of darkness shall provide acceptable, clear and uniform delineation without dead spots. No test reports are required, but the Engineer shall visually inspect all units and accessories for compliance with the various dimensional and material stipulations noted before approving their use in the work. The approval of any unit for use is subject to satisfactory field performance and does not preclude the Engineer ordering replacements of units; said replacements for these previously approved units shall be without additional compensation.

The pilot car, flaggers, flagging equipment, and AFAD shall meet the requirements of the MUTCD. The pilot car shall be a registered motor vehicle designed for use upon a highway. "Off-road" type vehicles will not be allowed. Automatic Flagger Assistance Devices (AFAD) must be selected from List IV-3 of the MSDSAR Manual.

The Department has established List IV-3, WORK ZONE TRAFFIC CONTROL DEVICES – SIGN STANDS. Devices shown on this list and devices shown on the plans will be the only devices accepted for use, except that temporary custom tube steel A-frame sign stands may be used behind temporary or permanent concrete barrier and steel beam guardrail. Temporary custom tube steel A-frame sign stands shall meet the height requirements specified in ALDOT Special Drawing - “Details for Traffic Channelization Devices”. List IV-3 is in the MSDSAR manual. TRAFFIC CONTROL DEVICES FOR CONSTRUCTION WORK ZONES 643

740.03Construction Requirements

The Contractor shall assign an employee to have the primary responsibility and sufficient authority for the implementation and maintenance of traffic control operations. This employee shall have the responsibility of making modifications to the traffic control that may be necessary because of changing circumstances during construction. The Contractor shall also assign an employee to be available during non-work hours to respond to calls involving the maintenance of traffic control devices. The Contractor shall provide the Department with the contact information in writing for these employees at the preconstruction conference. The Contractor shall also notify the local law enforcement agency in writing with a copy to the Project Manager of the contact information for these employees.

All traffic control devices necessary for the first stage of construction shall be properly placed and in operation before any construction is allowed to start. When work of a progressive nature is involved, such as resurfacing a road under traffic, the necessary signs shall be moved concurrently with the advancing operation. All construction signs shall be erected in a workmanlike manner such that all supports are vertical, sign panels generally perpendicular to the travelway and legends horizontal so that they effectively convey the intended message. These signs shall be mounted on stationary or temporary supports as directed by the Engineer and dependent on the type work being performed. In general work being performed at spot locations and of short duration will necessitate the use of temporary supports properly ballasted for stability. Supports shall not extend above the top edge of the sign panel. The location, legends, sheeting, dimensions, spacing of supports, and horizontal and vertical placement with respect to the pavement of warning signs, barricades and other traffic control devices shall be as required by plan details, MUTCD and as directed or approved by the Engineer. The Contractor must advise and have the approval of the Engineer prior to installing or removing traffic control devices from the project.

During periods when signs and other devices are not being used for traffic control, they shall be removed from the work area, covered with the specified material or otherwise positioned so they do not convey their message to the traveling public. If covered, the covering material shall be 1/2 inch {13 mm} (nominal size) exterior plywood or aluminum composite material cut to fit the shape of the sign panel. The covering material shall be installed in accordance with the plan details and in such manner that no damage will occur to the sign panel during installation. Covering material shall be maintained in a neat and workmanlike manner during its use.

Flaggers with proper attire and flags shall be provided when ordered by the Engineer or when the Contractor deems flaggers necessary to safely handle traffic through the construction zone. Flaggers are considered a general requirement of all traffic control schemes and no direct payment will be made for such.

If the Engineer determines that the proper provisions for safe traffic control are not being provided and maintained by the Contractor the Engineer will order suspension of the work until the proper level is achieved. In cases of serious or willful disregard for safety of the public by the Contractor, the Engineer may restore the traffic control measures to proper condition and deduct all costs of this work from monies due or becoming due the Contractor.

The Contractor's personnel involved in the implementation, operation, and inspection of traffic control shall be trained appropriate to the decisions each individual is required to make in accordance with 23 CFR 630 Subpart J. The Contractor's personnel shall have completed the training prior to performing the traffic control work. The Contractor shall furnish a written certification at the preconstruction conference that is worded as follows: “I do hereby certify that all personnel who are involved in TRAFFIC CONTROL DEVICES FOR CONSTRUCTION WORK ZONES 644

the implementation, operation, and inspection of traffic control on the referenced project are trained, or will be trained prior to beginning work, appropriate to the decisions each individual is required to make in accordance with 23 CFR 630 Subpart J”. This wording shall be followed by the signature of an authorized representative of the Contractor. Employees shall receive periodic training updates that reflect changing industry practices. The Contractor shall maintain records of the training. The records shall include dates of training, name of instructor, name of attendee, length of course, and topics covered. The records shall be available for auditing by the Engineer.

Special construction signs shall consist of signs which require special fabricated sign panels or special mounting requirements; such signs will be designated as "Special" on the construction plans.

Pilot car operation and associated flagging shall be performed as described in the MUTCD. Flagmen and flagging devices are considered a necessary requirement of the pilot car operation and no direct payment will be made for such.

The Contractor shall assume full responsibility for the continuous and expeditious maintenance of all construction warning signs, barricades and other traffic control devices. Maintenance shall include, but shall not be limited to, replacement of sign panels, barricades and other devices which, in the opinion of the Engineer, are damaged or deteriorated beyond effective use, replacement of broken supports, plumbing of leaning signs, cleaning of dirty signs, barricades and other devices, repair of defaced signs, replacement of stolen items, etc. All items used for traffic control shall be generally maintained in its original placement condition and such maintenance will be considered a part of the original installation cost. Failure to maintain all traffic control devices in such manner as to provide adequate continuous safety to the public will be cause for action by the Engineer as noted in the last paragraph of Item 740.03(a)5.

Reference is made to Section 107 of the Specifications which covers the legal responsibilities of the Contractor to the traveling public. Although the Department will be designating and directing the placement of certain traffic control devices, the Contractor is not relieved of his responsibility to continuously review and maintain all traffic handling measures and ensure himself that adequate provisions have been made for the safety of the public and workmen. Construction signs and other traffic control devices specified by plan details are considered the necessary requirements for satisfactory traffic control. This does not preclude the Engineer from ordering, or the Contractor from requesting for approval, additional signs or traffic control devices to safely handle unforeseen traffic situations, in which case they would be paid for. The Contractor may, with the approval of the Engineer, furnish additional traffic control devices, at no cost to the Department, to protect his work and/or workmen.

740.04Method of Measurement

The various items used in the handling of traffic through construction zones will be measured for payment as follows: Construction Signs and Special Construction Signs which are specified by plan details or ordered by the Engineer and approved for use will be measured in square feet {square meters} computed from measurements of the actual sign panel installed (no deductions will be made for corner radii). The sign supports and mounting hardware are considered incidental to the use of these sign units; hence no separate measurement or payment will be made for the supports and hardware. Measurement for payment under the Item of Special Construction Signs will only be made on signs designated as "Special" by plan details or ordered as "Special" by the Engineer. Drums will be measured individually for the number ordered and furnished. Cones will be measured per each and shall be 36 inches {900 mm} high with a ballasted base. Cones of smaller height may be used for operations such as pavement striping and marking, but no direct payment will be made. Barricades will be measured individually for the type designated and furnished.