731.01 Description.
730-C Furnishing and Installing Traffic Control Unit (2) - per lump sum 730-E Metal Traffic Signal Pole Foundation – per each 730-F Metal Traffic Signal Pole with (3) Mast Arm Assembly - per each 730-G Traffic Signal Pole, (4), (5) - per each 730-H Loop Wire - per linear foot {meter} 730-I Loop Detector Lead- In Cable - per linear foot {meter} 730-J Vehicle Loop Detector - per each 730-K Traffic Signal Junction Box - per each 730-L (6), (7), Conduit - per linear foot {meter} 730-M Interconnect Cable, (8), (9) AWG, (10), (11) - per linear foot {meter} 730-N Luminaire Extension Assembly, (12) feet {meters} - per each 730-O Illuminated Sign Assembly (13) (14) - per each 730-P (15) Signal Head, (16) Section, Type (17) - per each 730-Q Miscellaneous Equipment , (16) – per each 730-R Controller Assembly, Type (18) , (19) Output Phase Channels - per each 730-S (20) Traffic Signal Preemption (21) (22) (2) – per lump sum 730-T Electrical Power Service Assembly (23) – per each 730-U (24) Detection System (2) – per lump sum 730-Y (25) Pedestal Pole and Foundation with (26) – per lump sum
1.Specify Partial or Temporary if required
2.Specify Intersection Location
3.Specify Length of Mast Arm
4.Specify Type (Metal Strain, Concrete Strain, Wood Strain, Pedestal)
5.Specify State Furnished if required
6.Specify Size (1 inch, 2 inch, or 3 inch) {27 mm, 53 mm, or 78 mm}
7.Specify Type (metallic or non -metallic)
8.Specify Type (Aerial Self -supporting, Aerial Las hed, or Underground)
9.Specify Cable Size (No. 14 AWG or No. 19 AWG)
10.Specify Number of Conductors or Pairs (9 Conductors or 6 Pairs)
11.Specify (IMSA 20 -1, IMSA 20 -3, REA PE- 22, REA PE -38, or REA PE -39)
12.Specify Arm Length in Feet {Meters}
13.Specify Lighting Method (with Flashing Beacon, or With Embedded LEDs)
14.Specify Power Source (Solar, or Utility Powered)
15.Specify Vehicular or Pedestrian
16.Specify Type (Backplate for Existing Signal Head, Pedestrian Push Button, Pedestal Pole and Foundation)
17.Specify Type (Incandescent, Optically Programmed, or LED)
18.Specify Type (NEMA or ATC)
19.Specify Number of Output Channels (8, 16, or 32)
20.Specify Type (Acoustical, Optical or GPS)
21.Specify Whether or not Software is Requ ired (With Software, or Without Software)
22.Specify Whether or not Training is Required (With Training, or Without Training)
23.Specify Whether or not Wood Pole is Required (With Wood Pole or Without Wood Pole)
24.Specify Type [Video, Radar, Magnetometer, or Hybrid (Video/Radar)]
25.Specify (Furnishing and Installing, Removal of, or Relocation of)
26.Specify (Flashing Beacon, Pedestrian Signal Features, or Illuminated School Zone Sign) TRAFFIC COUNTING EQUIPMENT
731.01 Description.
This Section shall cover the work of furnishing and installing, complete in place, traffic counting equipment as shown on the plans, at locations shown on the plans, all in accordance with the details shown on the plans and these Specif ications.
731.02 Materials.
For the purpose of these Specifications traffic counting equipment will be classified as operational units. Traffic Counting Units shall be classified by “Type” which will designate the number and design of the loops, etc., in accordance with det ails shown in the plans. For the definition of equipment, words, and terminology used in the furnishing and installing of Traffic Counting Equipment, refer to the appropriate publications of the Institute of Transportation Engineers (I.T.E.) and to the M anual of Uniform Traffic Control (MUTCD).
731.02 Materials.
a.General . Material and equipment listings shall be furnished to the Engineer within thirty days after the issuance of the “Notice to Proceed”. The Contractor shall submit to the Transportation Planning Bureau’s Traffic Monitoring Section for approval, five copies of a complete list of all materials and equipment. Partial listings will not be accepted for consideration. Material and equipment lists shall include catalog cutouts or published dat a sheets and a completed Material Submittal Form. Unacceptable submittal data will be returned for corrective action. Three copies of the approved material and equipment listings will be returned to the Contractor and one approved copy will be sent to the Construction Bureau. Any changes to the approved material or equipment lists shall be requested in writing through proper channels. If requested by the Engineer, the Contractor shall submit for inspection and approval samples of both the specified and pro posed substitute item at no cost to the Department. Materials and equipment installed or used without prior approval of the Engineer shall be at the risk of subsequent rejection. The State shall not be liable for materials purchased, work performed, or any delay incurred due to the failure of the Contractor to secure prior approval. Failure of the Engineer to note unsatisfactory material as received will not relieve the Contractor of responsibility. Manufacturers' warranties and guaranties furnished on material and equipment used in the work shall be delivered to the Engineer; likewise, instruction sheets and parts listed supplied shall be delivered to the Engineer upon receipt of the equipment. Reference to a particular product by manufacturer, trade name, or catalog number establishes the quality standards of material and equipment required for this installation and is not intended to exclude products equal in quality and similar in design. Whenever any article, material, or equipment is defined by describing a proprietary product or by using the name of a manufacturer or vendor, the term "or approved equal" if not inserted, shall be implied. Electrical materials shall conform to the Standards of the National Electrical Manufactures Association (NEMA) and/or the Underwriters Laboratories, Inc. (UL), in every case where a standard has been established for that particular article, material, or equipment. All material and equipment shall be of the best quality and workmanship and shall be new unless otherwise n oted on the plans. Throughout the entire project, all units of any one item, such as enclosures, and associated equipment, etc., shall be made by the same manufacturer. Inasmuch as certain materials and equipment furnished for use under this Section will be standard production type products, acceptance will be made by the Engineer based on selected confirmation tests, the manufacturer's certification of the material and/or design conformance to the requirements noted in this Section, details shown on the plans, and visual inspection at the job site. The manufacturer shall make available to the Department test data and material samples from the production runs for use in evaluation of their product. Title 32, Chapter 5A, Subsection 36 of the Code of Alaba ma states that all traffic control devices shall be approved by the Transportation Director before they can be used, sold, or offered for sale. Approved products can be found in the Departments "Materials, Sources, and Devices With Special Acceptance Requi rements" manual. The Contractor may choose from any of these products, unless otherwise noted. Refer to Subarticle 106.01(f) and BMTP -355 concerning this list.
b.Terminal Strip Enclosure . Terminal Strip Enclosure shall include, but not limited to, the en closure, terminal strips, pin connectors, ground rod, ground rod clamp, ground wire, and ground lug. Terminal Strip Enclosure and associated equipment shall conform to the detailed plans.
c.Loop Wire . Loop wire conductors shall be stranded soft annealed stranded wire of not less than 98 percent conductivity and shall be insulated for 600 volts or more with a cross -linked polyethylene insulation. Conductors shall be Type RHH or RHW or Use or XHHW.
731.03 Construction Requirements.
d.Conduit Systems .
1.Non -Metallic Conduit . Non-metallic conduits shall be Type II, Schedule 40, PVC unless otherwise noted on the plans. All non -metallic conduits and fittings shall conform to UL Standard 651 or NEMA TC -2 latest edition.
2.Liquidtight Flexible Metal Conduit . Liquidtight flexible metal conduits shall conform to UL listed Type UA for the intended use.
e.Terminal Strip Enclosure Support . The Terminal Support Enclosure support structure shall be in accordance with the details shown on the plans and meet the requirements of Article 840.04.
f.Pole For Mounting Traffic Detection Equipment. The structural design, submittal, material, and fabrication requirements given in Sections 730, 718 and 891 shall be applicable to the furnishing and installation of a pole that is required for the mounting of traffic detection equipment.
731.03 Construction Requirements.
a.General . All required material and equipment shall be installed in accordance with the manufacture’s recommendations, details shown in the plans, and as designated in the pro posal. All installations shall comply with the regulations of the latest edition of the National Electrical Code (NEC) and the latest edition of the National Electrical Safety Code. Coordination of this work with regular roadway or bridge work will be of prime importance to prevent undue damage to completed items of work or existing facilities. Any damage to existing facilities caused by the installation of the material and/or equipment required under this section of work, shall be repaired by the Contract or at no additional cost to the State. After all equipment has been installed and an operational check has been instigated, the Contractor shall furnish the Engineer with a corrected set of plans showing in detail all changes on construction from the origi nal plan details.
b.Grounding . All metal enclosures containing electric wires and/or equipment shall be grounded. Ground rods shall be installed at all the terminal strip enclosure. Single ground rods shall be driven vertically until the top of the ro d is at least 12 inches {305 mm} below the finished grade. A length of No. 4 bare soft drawn copper shall be attached to the ground rod clamp as shown on the plan details. Where a grounding conductor passes through a metal conduit, a suitable grounding bushing shall be placed on each end of the conduit and connected to the ground wire. Where non -metallic conduit is used, a separate continuous grounding conductor shall be extended from the service ground to all equipment and shall be used for grounding purposes only. Testing of Grounding System: The effectiveness of the ground rod shall be determined by measuring resistance from the pole enclosure to a convenient underground water line, with a 0 -50 ohm megger (J.H. Biddle Company or equal) where a water line is available and with auxiliary ground method where the water line is not available. The two auxiliary ground rods shall be not less than 50 feet and 100 feet {15 m and 30 m}, respectively, from the tested rod. If reading is greater than 25 ohms, addition al rods shall be installed until a reading of 25 ohms is obtained.
c.Wiring . All wiring shall be installed in a neat and workmanlike manner. Wiring within enclosure cabinet shall be neatly arranged and laced. Loop wire shall be one continuous run without splicing. All ends of cable shall be taped to exclude moisture and shall be so kept until terminal strips are attached.
d.Loop Wire Installation . A conduit run shall be completely installed before the installation of wire. Wires in conduits shall be carefully pulled into place using approved methods so that the cable will be installed free from any electrical or mechanical injury. Powdered soapstone, talc, or other inert lubricant specifically designed for the purpose shall be used. A conduit run shall b e completely installed before the installation of wire. Wires in conduits shall be carefully pulled into place using approved methods so that the cable will be installed free from any electrical or mechanical injury. Conductors shall be handled and install ed in such a manner as to prevent kinks, bends or other distortion which could damage the conductor or outer covering. All cables within a single conduit shall be pulled at the same time.
731.03 Construction Requirements.
Loop wire shall be installed in slots cut in the pavement, at locati ons designated on the plans or as directed by the Engineer. The slot shall be formed by sawing pavement with approved equipment designed for sawing pavement, to the width and depth indicated by the plan details or directed. The slot shall be cleaned of al l foreign loose debris using compressed air or other approved means before installation of the loop wire. After installation of the loops, the slots shall be sealed with an approved sealant manufactured specifically for embedding loop detector wire in conc rete or bituminous pavements. All conductors installed under paved areas shall be encased. Installation of the casing shall be made either prior to placement of the pavement with thick wall rigid metallic or rigid casing, or it shall be jacked or bored th rough the roadbed under the pavement using thick wall rigid metallic casing providing a minimum cover of 30 inches {762 mm}. The sealant proposed for use shall be shown in the proposed list of materials to be used.
e.Conduit System Installation . Conduits shall be joined by approved fittings using methods prescribed the manufacturer of the conduit. Where non -metallic conduit join metal conduits, connection shall be made using appropriate couplings to form a watertight raceway. Bushings shall be ins talled as shown on the plan details. Underground conduit shall be installed as shown on the plans with a minimum cover of 30 inches {762 mm }. When rock is encountered in the in the bottom of the trench, the conduit shall be installed in a bed of well com pacted, fine grained soil at least 2 inches {50 mm} thick. If 30 inches {762 mm} cannot be attained, convert the conduit to asphaltum painted metallic conduit installed as deep as practical but no less than 6 inches {152 mm}. Seeding and mulching of disturbed areas shall be backfilled and compacted to prevent future settling. Seeding and mulching of disturbed areas shall be as directed by the Engineer as a subsidiary obligation of the conduit installation. Precautions shall be taken to be sure that the con duit will be located to avoid conflict with proposed guardrail, signpost, etc. Where possible, a minimum of 12 inches {305 mm} shall be provided between the finished lines of conduit runs and utility facilities, such as gas lines, water mains, or other underground facilities not associated with the electrical system. Where the conduit run is adjacent to concrete walls, piers, footings, etc., a minimum of 4 inches {102 mm} of undisturbed earth or firmly compacted soil shall be maintained between the conduit and the adjacent concrete. Unless specified on the plans, trenches shall not be excavated in existing pavement or paved shoulders to install conduit. When it is necessary to place conduit under an existing pavement, the conduit shall be installed in accordance with Section 756. Unless approved otherwise by the Engineer, no trenches shall remain open after normal work hours each day. All trenches shall be protected from the accumulation of water which might cause an undermining of adjacent structures or util ities. The Contractor shall adequately support all pipes and other structures exposed in trenches.
f.Excavating and Backfilling . Before beginning any excavation, the Contractor shall determine the location of any electrical, drainage or utility lines in the vicinity and shall conduct his work in such a manner as to avoid damage to the same. All excavation required for the installation and placement of conduits and other materials shall be performed in such manner as to cause the least possible injury to pavement, curbs or other improvements. All conduits required to be under pavement, sidewalks, etc. shall be in place prior to commencing of base and paving operations. The trenches shall not be excavated wider than necessary for the proper installation of t he material. Excavating shall not be performed until immediately before installation of conduit and other appliances. The material from the excavation shall be placed in a position where the least interference with the surface drainage will occur. Should l arge rocks be encountered in conduit trenches, they shall be removed to a depth of 3 inches {75 mm} below the proposed elevation and replaced with 3 inches {75 mm} layer of suitable material. All suitable material removed from the conduit trenches shall be used in backfilling of the trenches; however, no stone larger than 3 inches {75 mm} shall be in contact with any conduit. All surplus excavated material shall be removed from and disposed of by the Contractor, as directed by the Engineer. Excavations, aft er backfilling, shall be kept well filled and maintained in a smooth and well drained condition until permanent repairs are made. The Contractor will be required to restore any areas disturbed by his work to their original condition without additional cost to the State.
731.04 Guarantee.
g.Encasement . All encasement shall meet the requirements of Section 756 and the requirements set forth in this proposal. If the Contractor should encounter extraordinary circumstances such as major utilities under existing pavement which the location cannot be accurately determined, he may request in writing permission to open cut a trench in lieu of jacking or boring. This request shall also include a detailed proposed sequence of excavating, backfilling, method of handling of traffic etc . for the Engineer's consideration. No such work shall be performed without written permission of the Engineer.
h.Installation of a Pole for Mounting Traffic Detection Equipment. A pole required for mounting traffic detection equipment shall be installed in accordance with the requirements given in Section 730 and the details shown on the plans.
731.04 Guarantee.
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.
731.05 Method Of Measurement.
Furnishing and installing of traffic counting equipment w hen 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.
731.06 Basis of Payment.
a.Unit Price Coverage . 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, fabri cation 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 list ed in Section 730.05 for changes to the size of the pole foundation.
b.Payment will be made under Item No .: 731-A Traffic Counting Units, Type ____ per Each 731-B Pole for Mounting Traffic Detection Equipment - per Each SECTION 734 REMOVAL AND RELOCATION OF INTELLIGENT TRANSPORTATION SYSTEMS
734.01 Description.
The work under this Section shall cover the work of decommissioning, removal (wholly or in part), the satisfactory salvaging or disposal of, or the r elocation of Intelligent Transportation Systems (ITS) infrastructure and/or equipment as designated on the Plans or in the Proposal. Salvaging of materials for reuse by the State will be required only when such is designated by the Plans or Proposal; othe rwise, the materials shall become the property of the Contractor. Quantities and limits of this type of work indicated on the Plans are approximate only, subject to the Engineer’s evaluation of the actual site condition.
Source: Alabama Standard Specifications for Highway Construction, 2022 Edition. Pages 675–678 of 934.