804—DYNAMIC MESSAGE SIGNS

804.01 Description

This work shall consist of furnishing and installing light emitting diode Dynamic Message Signs (DMS), control equipment, support materials, testing, training and miscellaneous equipment and services in accordance with these Specifications and as shown on the Plans or directed by the Engineer.

804.02 Materials

804.04 DMS Equipment

804.05 Procedures

Securely mount the sign on the sign support structure in accordance with Section 700 and the design of the structure; DMS sign case, and attachment hardware. All signs shall be mounted with a minimum clearance of 20 feet between the crown of the roadway surface and any portions of the signs or associated structure. Lift and install the DMS housing and display in place on the overhead structure only with prior approval of, and in the presence of the Engineer. Do not lift and install the DMS housing and display until all equipment, materials, and labor are available so that the DMS can be operated with messages from the local DMS controller within 72 hours of installation on the overhead structure. When lane closures are required for DMS installation, attach and secure all mechanical hardware for initial attachment prior to the reopening of lanes to traffic. Complete the attachment of hardware prior releasing the lift cables. Install and connect the DMS sign wiring and communications cables to the field device cabinet only after attaching and securing the sign to the sign structure. Furnish and install DMS communications cables between the DMS housing and ground cabinet. Install all equipment necessary to operate the dynamic message signs. Furnish and install any conduit required on the device structure for installation of any power conductors and communications cabling to the DMS assembly. All wiring between assemblies within the sign case and the ITS controller cabinet shall be installed in conduit. Feed all cable connections from the DMS assembly leaving a minimum of 25 feet of slack in the cable for normal movement and maintenance of the assembly. At vertical transitions, support the cable by integral hooks or other methods that assure that the stress placed on the wiring or fiber optic cable is minimized and in no case violates the cable or wire manufacturer’ s maximum static, pulling, or dynamic tension, or bend radius. Install the wiring in continuous, unspliced lengths between the sign housing and the field device cabinet. Coil sufficient slack neatly in the base of the field device cabinet to ensure that the connections to the housing and the power source will be possible without the need to add or splice any cables. Route all other wiring within the sign case and ITS controller cabinet in properly supported cable trays. Furnish and install all necessary power and communications cabling and terminations in the ITS controller cabinet for a fully functional system including operability at the cabinet, at the DMS, between the cabinet and the DMS, and between the cabinet and any upstream and downstream cabinets. This shall include any fiber jumpers, Cat5e jumpers, etc. that may be required for complete functionality of this ITS project. Perform all connector crimping using a ratchet installation tool with a compatible crimp jaw sized for the connector used. Strip wire in accordance with the connector manufacturer’ s recommendations. 804.04 947Make all connections to terminal boards or screw-type equipment terminals with insulated fork-tongue compression connectors using stranded cable. Make all wiring to bulkhead connectors on equipment housings with MS bayonet-type or other connectors. Solder connector joints for use with extra-low voltage (less that 30 V olts) systems, with the joint metals preheated to the flow temperature of the solder or crimped using ratchet-type positive crimp tools and a double crimp (conductor and jacket) connector. Make all harnesses neat and firm, and route them to minimize cross talk and electrical interference. Sep - arately bundle or shield wiring containing AC from all DC logic control circuits. Route wiring to prevent conductors from being in contact with metal edges. Arrange wiring so that any removable assembly may be removed without disturbing conductors not associated with that assembly. After installation and cable termination, perform an initial test to confirm that the DMS has been installed in accordance with the manufacturer’ s recommendations. This initial test is not a replacement of or substitute for any acceptance test. Perform the DMS assembly manufacturer’ s initial power-on test in accordance with the manufacturer’ s recommendation. Ensure that the DMS assembly receives all te - lemetry settings by exercising the DMS from the DMS controller in the cabinet or other recommended procedure(s) to confirm that the initial functionality is operational. The Engineer will program message displays on the DMS at the point in time that the power and communication circuits are fully operational. Visually confirm that the DMS display is properly aligned to provide maximum legibility. Make sight alignment adjustments to the DMS housing and display to ensure the greatest viewing angle is achieved as directed by the Engineer. The Contractor may submit a request for approval by the Engineer to mount power supplies in a Con - tractor-provided 336S cabinet pole-mounted as specified in these Specifications for ITS Infrastructure near the base of the sign structure where voltage drop distances and/or non-ventilated cabinets warrant. Upon approval by the Engineer of the Contractor’ s request, non-ventilated cabinets being retrofitted will not require upgrading with new ventilation, cooling fans, and temperature sensors unless required by the DMS manufacturer. If the DMS manufacturer requires new ventilation, cooling fans, and temperature sensors, the Contractor shall furnish and install a power supply cabinet at no additional cost. Remove and dispose of any existing sign up-lights located immediately in front of proposed DMS panel locations. The Contractor shall maintain existing lighting and lane control signals and associated electrical circuitry for remaining sign lights on structure. Existing static sign panels (e.g. Shoulder Lane, HOV , Restricted Lane) and lane control signals may remain in place if the Contractor’ s operations do not require removal, otherwise the static sign panels and lane control signals shall be salvaged and re-used at the existing locations.

804.06 Measurement and Payment

Dynamic Message Sign (Type/(Amber/Full-Color)) will be measured in units of each and will be paid for at the contract unit price per each. This price shall include furnishing, installing, testing, personnel training, providing operational software packages and firmware, supplies, shop drawings, documenta - tion; and all labor, tools, materials and equipment and incidentals necessary to complete the work. DMS UPS and associated batteries shall be considered incidental to the DMS. Fifty percent (50%) of the unit price bid for this item will be paid upon delivery of the DMS unit and all equipment for each individual location to the Contractor’ s staging area. Thirty percent (30%) of the unit price bid for this item will be paid upon successful completion of the Field Acceptance Test. Twenty percent (20%) of the unit price bid for this item will be paid upon successful completion of the 30-Day System Acceptance Test. DMS Sign Structure (Type/Length) will be measured in units of each and will be paid for at the contract unit price per each. This price shall include designing, fabricating, furnishing and installing the complete structure, grounding electrodes, grounding conductors, grounding lugs, identification tags, galvanization, field drilling and all materials, labor, tools, equipment, and incidentals necessary to complete the work. Eighty percent (80%) of the unit price will be paid upon completion of the structure. The remaining 20% of the unit price will be paid upon completion of the field acceptance test for the DMS.804.06 950Concrete foundations for sign structures including maintenance pad, vented rodent barrier, clearing and grubbing, and incidentals necessary to complete the work will be measured and paid for in accordance with Section 700. Conduit and electrical conductor cables between the controller cabinet and DMS structure will be mea - sured and paid in accordance with Section 700. Test bores will be measured and paid separately in accordance with Section 700. DMS Communication Cable will be measured in units of length and will be paid for at the contract unit price per linear foot. This price shall include furnishing and installing single mode and terminating fiber optic cable or other approved cable for connection between the DMS and controller. This price shall be full compensation for all labor, materials, tools, and equipment necessary to complete the work. DMS Retrofit (Type/(Amber/Full-Color)) will be measured in units of each and will be paid for at the contract unit price per each. This price shall include assessing sites; providing DMS controller, cabinet accessories, auxiliary UPS power, operational software packages and firmware, and working drawings for electrical and communications (including sign case modification drawings, attachment details, and written approach of the retrofit process); removing the DMS; transporting to and from site; refurbishing sign case; disposal of unsuitable surplus materials; testing, training, re-installing; and all labor, tools, materials, equipment, and incidentals necessary to complete the work. Ten percent (10%) of the unit price will be paid upon completion of Electrical and Communication Working Drawings. Seventy percent (70%) of the unit price will be paid upon completion of the re-installation of the DMS and successful field acceptance testing. The remaining 20% of the unit price will be paid for upon completion of the 30- Day system acceptance testing and delivery and acceptance of the as-built drawings. DMS Support Equipment will be measured in units of each and will be paid for at the contract unit price per each. This price shall include furnishing a set of support materials for each type of DMS. Conduit Repair will be measured in units of linear feet and will be paid for at the contract unit price per linear foot. This price shall include furnishing and installing conduits and couplings, excavating trench, backfilling, clearing and grubbing, seeding/restoration and all labor, tools, materials and equipment necessary to complete the work of repairing 4” conduit or smaller. Payment for removal of DMS structures will be in accordance with Section 510. Payment will be made under: ——————————————————————————————————— Pay Item Pay Unit———————————————————————————————————Dynamic Message Sign (Type) (Amber/Full-Color) Each DMS Span Structure (Length) Each DMS Butterfly Structure (Type) Each DMS Communication Cable Linear Foot Dynamic Message Sign Retrofit (Type) (Amber/Full-Color)) Each DMS Support Materials Package Each Conduit Repair Linear Foot———————————————————————————————————804.06 951SECTION 805—VEHICLE DETECTION AND DATA COLLECTION

805.01 Description

This work shall consist of furnishing and installing nonintrusive high definition (HD) microwave radar vehicle detector system (VDS), with Transient V oltage Surge Suppression (TVSS) in accordance with these specifications and as shown on the plans or as directed by the Engineer. The VDS shall be capable of vehicle presence detection and traffic data collection meeting the requirements defined herein.

805.02 Materials

All components of the vehicle detection system shall be fully compatible and operational with VDOT’ s Traffic Operations Center (TOC) central system software for the respective region where the VDS are being installed. All materials furnished shall be new products. Reconditioned equipment or system components shall not be used. The materials, equipment, and components shall be commercial off-the shelf products. The VDS assembly shall consist of microwave radar sensor(s) in enclosed housing(s) (i.e., the detectors). The Contractor shall furnish an installation kit with mounting brackets; horizontal extension arm (length as recommend by the manufacturer); VDS composite cable for the transmission and receipt of data and communications between the field detector and the communication system hardware in the ITS field controller cabinet; and all required power and data cables.