Section 630 Section 630 630-F: Delineators, Mounting, Description - per each 630-G: Type ____ Object Markers, Description, Mounting, Color - per each 630-H: Treated Timber Posts, Size and Length - per each 630-I: Metal Overhead Sign Supports, Assembly No. ___, ** - lump sum 630-J: Overhead Sign Supported on Bridge, Assembly No. ___, ** - lump sum 630-K: Welded & Seamless Steel Pipe Posts, Size - per linear foot * Specify Steel U-Section or Square Tube ** Indicate when the sign is “Contractor Designed" SECTION 631 – TRAFFIC SIGNAL SYSTEMS - GENERAL
631.01 Description. This section together with the pay item sections covering individual
components and the plans are intended to describe and include materials and work necessary for completion of traffic signal installations and modifications. All work, materials, or methods which ma y be necessary for completion of the traffic signal system which are not specifically mentioned in thes e specifications or on the plans shall be furnished as incidental to the pay items of the contract and the cost included in the respective contract prices bid.
631.01.1 Scope of Work . Work shall consist of furnishing and installing, modifying, or
removing all components, equipment, and incidentals necessary for a fully functioning, tested and approved traffic control signal system, including communications connections as applicable in the plans. Where there is an existing system involved, th e Contractor shall reuse, take ownership, immediately remove, or stockpile materials from the project site, as indicated in the plans or contract documents. Stockpiled materials shall be safely stored at a specified location. Stockpile locations shall be determined and approved by the Engineer. Any existing materials or items not addressed for payment under pay items for Removal of Obstructions or Removal of Existing Traffic Signal Equipment shall be considered incidental and their reuse or removal cost included in other respective contract prices bid. All installations shall be carried out in strict conformity with all requirements stated or implied on the plans and in the specifications. Upon completion the signal installation shall present a neat and finished appearance. A ll work and materials shall be subject to inspection at all times. The locations shown on plans, unless otherwise noted, are approximated and based on the best available information at the time of design. Slight alterations or relocation of items may be required based on site conditions or as directed by the Engineer.
631.02 Materials.
631.02.1 General . All provided materials shall be of high quality and quality
workmanship. All materials shall be new, unused, and in strict accordance with the specifications and contract documents. All units of any one item used, shall be of the same make and model. Any reference to a specific manufacturer’s produ ct is intended to indicate the quality of acceptable materials. Any such reference is in no way restrictive of any product that meets requirements of the appli cable specifications, plans, and contract documents. The Contractor may propose the alternate use of other manufacturer's materials on a basis of equality for the purpose intended as long as these proposed alternate materials are fully compliant with the contract documents, plans, and specifications. The allowance of any alternate materials will be subject to approval by the Engineer.
631.02.2 Equipment List and Engineering Data . The Contractor shall submit to the
Engineer five (5) printed copies and an elect ronic copy of the list of materials which the Contractor proposes to install. The list shall identify the manufacturer and contain the quantity, model, and identifying descriptions of each item. Adequate engineering data, essential shop drawings, and schematic diagrams shall be provided for review. This list and accompanying engineer data and supplement al drawings will hereby be referred to as the “submittal.” The submittal shall be delivered within thir ty (30) days of contract execution. The Engineer shall report findings to the Contractor within fifteen (15) days of submittal receipt. If additional information is requested by the Engineer, the C ontractor shall provide the additional information within seven (7) days of the request. The Engineer shall report findings concerning the additional information to the Contractor within fifteen (15) days. If during the review process, the Engineer requires the Contractor to submit product samples, the product samples shall remain the property of the Contractor only if requested in writing at the time of submission. At th e completion of review , the article will be returned to the Contractor without cost to th e State. A product sample request shall be considered as a request for additional information. The Engineer will notify the Contractor in wr iting of the submittal review findings. Any approval given will be an indication that the Engineer has considered that the materials or products, if manufactured and furnished in accordance with the data submitted, could be certified by the manufacturer in accordance with the provisions and requirements of Subsection 106.04, and any approval given shall be subject to such subsection and other applicable provisions of the contract.
631.02.3 Regulations and Code . All work and materials shall be performed in strict
accordance with applicable requirements of Lo cal Codes, ASTM, ICEA, IMSA, ITE, NEC, NEMA, UL and the local electric utility. Abbreviations are contained in Subsection 101.01. When terms are not clearly defined herein, their meaning shall be understood to be that defined or used by the industry or tr ade. Clarifications s hould be made in writing to the Engineer prior to the work being performed. After January 1, 2018, the Contractor shall ha ve at least one certified IMSA Traffic Signal Construction Technician Level II employee overseeing the construction of all traffic signal work.
631.02.4 Operations . The Contractor shall furnish all labor, tools, equipment, means to
power equipment, barriers, and related items required or necessary to perform the work under the contract in an expeditious, careful, and safe manner. The Contractor shall conduct the work at all ti mes in such a manner as to ensure the least possible inconvenience to traveling public, and to property owners on the streets, alleys, and other public places where th e construction will take place. If underground utilities are in place or are encountered during excavation or other operations, all necessary protection from injury and damage thereof shall be provided by the Contractor. In order to facilitate such pr otection, it shall be the responsibility of the Contractor to solicit the assistance and coopera tion of the owners of any utility or structure that may be in conflict with any of the Cont ractor's operations, and the Contractor shall fully cooperate with such u tility in accordance with the prov isions and requirements of Subsection 107.18. The Contractor shall save the Department harmless from any additional cost incurred because of injury or damage by Contractor operations to any utility or structure. The repairs of any utility must be satisfactory to the owners, and insofar as intended function, physical condition and presence of the repaired utility shall be satisfactory to the Engineer. Unless otherwise specified in the contract, fo r any traffic signal system where an existing system is used to provide control of the movement of the traffic, the following shall be applicable:
a.All existing traffic control devices affect ed by the contract shall remain in full operation until all elements of the traffic si gnal system required for that contract are complete, inspected and tested for proper functionality. Upon initial inspection and acceptance testing of the co mplete traffic signal installation, the Contractor shall request the start of the 30 day burn-in period to commence as outlined in Subsection 631.03.4 of this specification. Any noted deficiencies found within that 30 day period shall be corrected to the satisfaction of the Engineer. Final acceptance will not be ma de until each traffic signal installation has operated satisfactorily for at least 30 consecutive days. The 30 day burn-in period must commence within the Contract Time, and before substantial completion of the project is granted. With approval of the Engineer, traffic control devices at individual sites within the system may be activated if all operation requirements listed above are met for that site. Activation of individual sites shall not be considered if interference with other elements of the system or operations may occur;
b.No part of the existing traffic signal system shall be deactivated, altered, dismantled, or removed without the confirmed permission of the Engineer. If it is necessary for the Contractor to modify a component of existing signal facilities because of construction operations, the Cont ractor shall first obtain approval of the Engineer for proposed procedures before making adjustments and relocations as made necessary by th e required construction;
c.Until such time as the existing traffic sign al site or facilities within a project are modified in any way by the Contractor, the Department or the local agency will retain responsibility for ongoing operation and maintenance of that existing traffic signal facilities. At all times during the life of a project, the Department or the local agency will furnish electric power for operation of the existing facilities. Prior to any modification at any existing traffic signal installation, the Contractor shall inform the Engineer of any signal equipment in conflict with the work so that the Contractor will not be held responsible for its repair. At such time the Contractor has received ap proval per paragraph (b) above and begins modifying an existing traffic signal installation in any way, the responsibility for maintenance and repair of that modified signal and all other traffic signal installations located within the project limits shall become that of the Contractor. When notified of needed traffic signal repa ir, the Contractor shall, within one (1) hour, contact the Engineer with the deta ils of their proposed response to the notification. The Contractor shall remain in contact with the Engineer until necessary repairs have been made. The Engineer in conjunction with the Traffic Engineering Division may waive the required one (1) hour response on a case by case basis, and at the request of the Contractor. At the start of work, the Contractor sha ll provide the Engineer with the names and telephone numbers of those responsible for maintenance of the existing and new signals. The Contractor shall have at least one person who can be contacted 24 hours a day, and seven (7) days per week;
d.Where damage is caused by the Contractor's operations, the Contractor shall at no additional cost to the Department or local agency repair or replace damaged facilities promptly in accordan ce with these specifications . Should the Contractor fail to perform the required repairs or replacements immediately, MDOT or the local agency may, at its discretion, perf orm the repairs or replacements and such cost of repairs or replacements will be de ducted from moneys due or to become due to the Contractor;
e.It shall be the Contractor's responsibility at the time of installation to fully cover all heads and signs to the satisfaction of the Engineer. All covers shall be of material and function specifically designed for covering traffic signal heads, including all integrated straps and security re straints to ensure covers stay in place. The signal head covers shall be an out door-hardened material that contrasts with the color of the head that clearly design ates the signal is not in “stop and go” mode. The signal head covers shall be approved by the Engineer prior to placement. Garbage bags, plywood or any other materials not specifically designed for covering traffic signal heads shall not be allowed. The signal head covers shall remain in place until the Engineer gives permission for uncovering in advance of pre-turn on inspection procedures;
f.A new traffic signal installation shall be put in flash operation for a period of three
3.to seven (7) days prior to the activation of the signal’s “stop and go” operation. Activation of new traffic signals shall be during a mid-week weekday (Tuesday – Thursday) during a non-peak time and shall be coordinated with the Engineer. Upon initial inspection and acceptance testing of the new traffic signal installation, the Contractor shall request th e start of the 30 day burn-in period to commence, as outlined in Subsection 631.03 .4 of this specification. Any noted deficiencies found within that 30 day peri od shall be corrected to the satisfaction of the Engineer. The 30 day burn-in period must commence within the Contract Time, and before substantial completion of the project is granted;
g.The provisions and requirements here in contained for the deactivation of an existing system shall be applicable to all types of existing signal systems, whether individual or combination of signal controls; and
h.If signal timings are not provided in the plans, the Contractor shall request timings from the Engineer at least f ourteen (14) days in advance of the system activation. No timings shall be used that have not been provided or approved by the Engineer. Printed documents containing the timings and all other controller settings shall be left in the cabinet. The Contractor shall require the manufacturer to begin the warranty or guaranty period of warranties and guaranties, as required in Subsection 106.01.2, not sooner than completion and acceptance of the 30 day burn-in period. If there are any discrepancies between the manufacturer warranty begin date and the system activation date, then the Contractor shall furnish the Engineer, in a form approved by the Department, similar warranties and guaranties as covenants under the contract and contract bond for an extended period of time equal to the period of time between the manufacturer warranty begin date and the system activation date.
631.02.5 Electri cal Service. It shall be the Contractor's responsibility to make the
necessary arrangements with the local power company to provide the power supply assembly for any new installation. The Contractor shall pay for, at no cost to the Department, all deposits, hook-up charges, or other service fees required by the power company for the establishment of new service. The Contractor shall be responsible for payment of the monthly service bill during the life of the project. The cost of all such fees shall be considered incidental and absorbed within existing pay items. The Department or the local agency will be responsible for payment of the monthly service bill for the new power service installation after Project Acceptance. When electric power service exists and is used for the operation of an existing system, the monthly service fees shall continue to be paid by the Department or the local agency. If the existing power service is intended for use with a new signal system, then any service charge fees shall be the responsibility of the Contractor. Similarly, if an existing power service is to be disconnected any service charge fees shall be the responsibility of the Contractor. The cost of all such fees shall be considered incidental and absorbed within existing pay items.
631.03 Construction Requirements.
631.03.1 General . The installation of the various types of equipment shall be carried out
in compliance with the requirements stated in the sections herein covering the individual components required to complete the traffic signal system and in conformity with the details shown on the plans. Upon completion of the work, all equipment shall present a neat and workmanlike finished appearance. Upon completion of the work and before final payment is made, the Contractor shall re move all excess materials from excavation, reshape disturbed portions of the highway, replace grass or sod in-kind, and leave the project site in a neat and sightly condition.
631.03.2 Electrical Service Equipment. The power supply assembly shall consist of all
equipment mounted on a service pole or pedestal as shown on the plans and as required by the service provider. The configuration and installation of the equipment mounted on the assembly shall meet the safety requirements and approval of the utility company or municipality furnishing power for operation. Service poles shall consist of wood poles w ith required pole line hardware, conduit, ground rods, guy wires and anchors and all other accessories and appurtenances mounted on the pole, except those items furnished by the utility company or municipality, or as specified separately in the co ntract or plans. Main disconnect switches shall be separately housed on the power supply assembly. Circuit breaker cabinets and meters shall not be installe d on the street or walk side of the pole or pedestal. Electrical service equipment shall meet the requirements of Subsection 722.13.
631.03.3 Performance Tests . The Contractor shall provide certified documentation of
the results of the following performance tests to the Engineer at the Engineer’s request. All testing required must be performed with a Department representative present. The Engineer and/or the Engineer’s representativ e reserve the right to attend and observe all tests.
631.03.3 1--Circuit Continuity and Short Circuit . All circuits shall be tested to
determine that they are continuous and free from short circuits, cross-circuits, or any other improper connection. No continuity shall exist between any conductor and another conductor including ground.
631.03.3 2--Freedom from Unspecified Grounds . All circuits shall be tested to
determine whether they are free from undesirable grounds.
631.03.3 3--Resistance to Ground . All non-grounded conductors shall be tested with a
1000-volt DC megohmmeter. The insulation resistance measured to ground shall be a minimum of ten (10) megohms for each conductor terminating at the signal controller cabinet. Loop detector wires tests shall be performed only after the installation of roadway loop sealant.
631.03.3 4--Ground Resistance . The resistance to ground shall be tested to the standards
set forth in Subsection 722.09.
631.03.4 Satisfactory Performance Period . Contractor shall develop a turn-on
procedure, compliant turn-on plan, and receive the Engineer’s acceptance of that plan prior to the signal installation being placed in operation. Final acceptance will not be made until each traffic signal installation has operated satisfactorily for at least 30 consecutive days under actual traffic conditions. During each 30-day performance period, if failure should occur in any system component, the cause of the failure shall be determined and reported to the Engineer. Upon acceptance of the caus e of failure by the Engineer, the necessary replacement(s) and repairs shall be made and all failed components presented to the Engineer for inspection. Upon successful repair , the system shall be operated satisfactorily for an additional 30 consecutive days. Contract time shall not be stopped due to the re- start of the satisfactory performance period(s). Time to perform the satisfactory performance period has been included in the Contract Time. When the Contractor has satisfactorily completed all items of work on the project including the satisfactory performance period, the Engi neer will make a final inspection of the completed work in accordance with Subsection 105.20. At the request of the Engineer, the Contractor shall be present at the time of final inspection. If all items of work are found to be satisfactory, the Executive Director will release the Cont ractor from maintenance. Project acceptance shall not occur prior to this final inspection and the burn-in period has been completed. Final acceptance is also subject to the guaran ty and warranty provisions of Section 100, Subsection 631.02.4, and other provisions of the contract.
631.03.5 Training . Training requirements, if any, shall be listed and described under the
specific section of the specifications to which th ey apply. The Contractor shall refer to the contract documents and plans for alternate or additional training re quirements when none are listed in the specifications. SECTION 632 - TRAFFIC SIGNAL CABINET ASSEMBLIES
632.01 Description . This work consists of furnishing, assembling, configuring and
installing all component materials and software required to form completed traffic signal controller assemblies, closed loop master controller assemblies and signal system installation of the types specified, in conformity with these specifications, to ensure fully operational traffic signal installations as shown on the plans.
632.02 Materials .
632.02.1 Cabinet Assembly. Cabinet Assemblies shall meet the NEMA 3R requirements
and be constructed principally of 0.125-inch thick, 5052-H32 aluminum. The aluminum shall have a mill finish per NEMA TS-2 7.7.3. Intermittent welds may be used for construction and any un-welded cabinet seams sh all be sealed with clear RTV silicone. All external fasteners shall be stainless steel and no holes will be allowed in top of cabinet. The door handles shall be stainless steel or cast aluminum. Door hinges shall be of the continuous type with a stainless steel hinge pin. Rivets are not be used to attach the hinge. The main door stop rod shall be constructed us ing stainless steel. The door stop mechanism shall be adjustable and capable of being securely latched in multiple opened positions including 90 degrees and a maximum of 120 degrees. The brackets attaching the stop rod to the door and cabinet shall be aluminum an d welded in place. Th e main door cylinder lock shall be a #2 key type lock. Two (2) traffic industry standard No. 2 keys shall be provided with each cabinet and shall be made using heavy duty key blanks. An access door which allows access to the back side of th e terminal facility sha ll be provided unless a pole mounted cabinet is required. Extruded aluminum channels permanently attached to the right and left cabinet sides shall be provided for attaching adjustable shelving and mounting of other component panels. The cabinet shall have two (2) shelves installed. Both shelves shall be provided with the front edge pre-drilled with 0.25-inch holes located twelve (12) inches apart. When base mounted, a 2-chamber cabinet with a traffic signal controller and an Uninterruptible Power Supply (UPS) system will be specified in the plans. The signal controller side of the dual chambered cabinet shall be provided with a rear access door to the terminal facility unless otherwise stated in the plans or contract documents.
632.02.2 Physical Features.
Source: Mississippi Standard Specifications for Road and Bridge Construction, 2017 Edition. Pages 526–531 of 1,113.