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.
a.Mechanical Specifications The vehicle detection system shall, at a minimum, produce vehicle presence, volume, speed, and occupancy data for each detected lane. The vehicle detection system detector shall use a Federal Communications Commission (FCC)-certified, low-power microwave radar beam to detect vehicle presence and generate volume, occupancy, and speed data as defined herein. The VDS shall be a true-presence microwave radar that uses the frequency modulated continuous wave (FMCW) principle. The detector shall transmit a low-power, frequency modulated microwave signal in a fixed beam. Any non-background targets detected shall reflect the signal back to the microwave radar detector and their range shall be measured. The vehicle detector shall determine vehicle presence by the return or reflection of radar output waves and, upon this return the VDS, shall generate data and/or a contact closure signal that corre - sponds to vehicle presence. The detector shall accumulate and transmit short-term statistical data on each zone using a serial communication port or an IP connection. The detector shall be capable of resolving closely spaced vehicles. The VDS setup program shall enable the operator to select whether the data is output as contact closures emulating standard loop detector outputs, and/or as accumulated statistical data using detector serial ports. The VDS sensor shall have a minimum 250-foot detection range with a viewing angle that is 65 degrees or greater vertical and seven degrees or less horizontal, and detection capability starting within 6 feet hori - zontally from the sensor pole. The VDS sensor shall have a minimum operating frequency of 24.0 805.02 952GHz (K-band). The VDS sensor shall have the capability of collecting and providing speed data for single vehicles. Speed trap algorithm shall utilize a dual radar beam detection method that detects individual vehicles speeds. The VDS sensor shall have the capability of detecting and displaying individual single vehicle speeds while monitoring sensor performance. The assembly shall be manufactured in such a way as to prevent reversed or improper installation. The VDS design shall provide high-voltage exposure protection to personnel during equipment operation, adjustments, and maintenance. The VDS shall provide speed-trap emulation and have the ability to automatically detect sensor settings, baud rates, loop spacing, and communication port settings to select an operational mode. The detector shall have the ability to self-tune and allow manual calibration via supplied vendor software. The VDS shall be capable of auto-calibration and auto-configuration, and shall not transmit any signals outside its FCC-approved frequency. Provide a setup program that allows the operator to define detection zones within the detector’ s field of view. The detector shall automat - ically configure zones, requiring minimal external tuning. The unit shall not be adversely affected by varied weather conditions, such as rain, fog, heat, or wind. The VDS shall have the capacity to compute, store, and provide all required traffic parameter measurements per detection zone in user-selected time intervals from 0 to 60 minutes, including, but not limited to, 10 seconds, 20 seconds, 30 seconds, 60 seconds, 5 minutes, 10 minutes, 15 minutes, 30 minutes, and 60 minutes. The VDS shall log and store vehicle volume, occupancy, and speed data locally in flash nonvolatile memory for all programmed detection zones for a minimum of seven days regardless of collection interval. Data storage within the VDS shall utilize a first in/ first out architecture such that the oldest stored data record is overwritten with the newest data re - cord when the storage device is at full capacity. Transient V oltage Surge Suppression (TVSS) shall meet the requirements of Section 802. The re - mote cabinet shall be of sufficient size to install the TVSS and terminate the data and power cabling.
b.Electrical Specifications The vehicle detection system shall operate using a nominal input voltage at the field cabinet of 120 volts of alternating current (V AC). The system’ s power supply shall operate with an input voltage ranging from 89 to 135 V AC. For any device requiring a source input other than the standard 120 V AC, supply the appropriate means of conversion. The power and communication cables shall comply with NEC sizing requirements as presented in NEC Article 210-19(a), Fine Print Note (FPN) No. 4, and meet all other applicable standards, specifications, and local code requirements. The VDS composite cable shall be a polyure - thane-jacketed cable approved by the Engineer, with polyvinyl chloride (PVC) insulated conductors. The VDS composite cable shall have a 300-volt rating and a temperature rating of 200°F. The cable shall be equipped with #20 or #22 American Wire Gauge (AWG) conductors, at a minimum. Power conductors from the power source to the assembly input shall be sized so that no more than a 3.0 percent voltage drop is experienced. All connections to the VDS shall be protected, including power and Ethernet connections to ensure the continued operation of the VDS in the presence of electrical surges.805.02 953The vehicle detection system or subcomponents shall automatically recover from power disruptions after power is restored. All programmable system settings shall return to their previous configura - tions and the system resumes proper operation.
c.Environmental Specifications The detection systems shall meet all specifications during and after being subjected to an ambient operating temperature range of 30°F to 165°F with a maximum non-condensing relative humidity as defined in the environmental requirements section of the NEMA TS 2 standard. The detection system manufacturer shall certify that its device has successfully completed environmental testing as defined in the NEMA TS 2 standard (latest edition). Vibration and shock resistance shall meet the requirements of Sections 2.1.9 and 2.1.10, respectively, of NEMA, TS 2 (latest edition). No item, component, or subassembly shall emit a noise level exceeding the peak level of 55 decibels adjusted (dBa) when measured at a distance of 3.3 feet away from its surface. System components shall comply with the environmental requirements detailed in the NEMA TS 2 standard. The Contractor shall provide third party enclosure test results for NEMA TS 2 testing.
d.Physical Specifications Any sensor detector assembly exposed to the elements shall be housed in an environmentally resistant and tamper-proof sensor detector enclosure. The enclosure shall be environmentally sealed upon installation and shall be light in color. The VDS shall: • weigh no more than 5 pounds • be no larger than 14” x 12” x 6” (L/W/D) • be mounted in a NEMA 4X polycarbonate box, whereby the electrical/communication connec- tions are located on the bottom of the box, unless otherwise approved. The remote cabinet, where applicable, shall meet or exceed NEMA 3X requirements. The VDS, associated mounting hardware, and horizontal extension arms shall be designed in accor - dance with the edition of AASHTO’ s Standard Specifications for Structural Supports for Highway Signs, Luminaries, and Traffic Signals specified in the VDOT Structure & Bridge Division’ s S&B-IIM-90 Memorandum (VDOT Modifications to AASHTO’ s Standard Specifications) in effect at the time of project advertisement.
e.Communication Standards The VDS field hardware shall meet the requirements in the FCC’ s 2005 Code of Federal Regulations (CFR), Title 47, Part 15. The detector shall not interfere with any known equipment. The detector shall be FCC certified and the FCC’ s identification number shall be displayed on an external label. The detector shall transmit within a frequency band of 24 - 24.25 gigahertz, or another FCC approved spectral band. The vehicle detection system shall generate and transmit traffic data in serial format using an Elec - tronic Industries Alliance (EIA) standard EIA-232 communication port and an Ethernet Internet 805.02 954Protocol (IP) interface. The Contractor shall verify that the detection system is IP addressable. All device communication addresses shall be user programmable. The communications interface in the cabinet shall provide EIA-232 and TCP/IP Ethernet connections. The serial interface shall be equipped with an EIA-232 DB-9 communication port for calibration and maintenance laptop connection. An Ethernet communication port shall be provided. All devices for converting the data communications protocol to Ethernet format shall be provided with each VDS detector. The interface ports shall support the following baud rates: 9600, 19200, 38400, 57600, and 115200. The EIA-232 port shall be full duplex and shall support true RTS/CTS hardware handshaking for interfacing to various communications devices. The serial port’ s data format shall be standard bina - ry non-return to zero (NRZ) modulation with 8-bit data, a 1-stop bit, and no parity. The detection system shall support Point-to-Point Protocol (PPP), Point to Multi-Point Protocol (PMPP) (i.e., polled protocols), and Ethernet protocols. The setup program shall assign an IP address to the detec - tion unit. The vehicle detection system shall respond to a polling request from the VDOT TOC for traffic data. The Contractor shall verify that the detection unit responds with the accumulated traffic parameter measurements from the period since the last polling request was issued.
f.Management Capability The vehicle detection system shall include computer software that allows an operator to program, operate, and read current status of all system features and functions using a laptop computer or remote TOC workstation. The vehicle detection system shall use protocols and device drivers compatible with VDOT TOC software for querying/polling the field devices. Any software-based applications shall not interfere with TOC software when the two are installed and used together on a shared hardware platform. The software application shall provide PC desktop display of the detection zones and control of any vehicle detector connected to the network. Any software licenses that may be needed for communication with the Department’ s TOC central system software and for field communications shall be provided. The detection system software shall offer an open API and software development kit available to the Department at no cost for integration with third party software and systems. An operator using a locally connected laptop computer shall be able to conduct system setup, cali - bration, diagnosis, and data retrieval operations. The detection system shall be capable of having its configuration data saved to a laptop computer or TOC operator workstation, which can later transfer the data back to the detection system for reloading. The detection system operator shall be able to use a laptop computer or TOC workstation to edit previously defined detection configurations to permit adjustments to the detection zone’ s size, place - ment, and sensitivity, and to reprogram the detector’ s parameters. The VDS shall support the configuring of lanes or detection zones in 1 foot increments or better. The laptop computer and the detection system shall have the capacity to communicate when connected directly by an EIA-232 cable. The laptop computer and detection system shall be able to communicate across the ITS system’ s communication network. The software shall support communication between multiple users and multiple field devices concurrently across the same communication network. The vehicle detection system’ s time clock shall be synchronized each time the device is polled.805.02 955Once programmed, no periodic adjustments shall be required to the detection zones unless physical roadway conditions change, such as lane shifts or closures.
g.Performance
1.Detection Accuracy The vehicle detection system shall meet minimum total roadway segment accuracy levels of 95% for volume, 90% for occupancy, and 90% for speed for all lanes, up to the maximum number of lanes that the device can monitor as specified by the manufacturer. The Contractor shall conduct performance validation on a sampling of 10% (rounded up to the nearest integer) of the project quantities on the Plans.
2.Calculation of V olume, Occupancy, and Speed Accuracy Perform evaluations by comparing sample data collected from the vehicle detection system with ground truth data collected during the same time by human observation or by another method approved by the Engineer to verify conformance with the accuracy requirements in this section. Base the vehicle detection system’ s performance evaluation on sample data taken over several time periods under a variety of traffic conditions. Weight each data sample to represent the predominant conditions over the course of a 24-hour period. Samples will consist of 15- and 30 minute data sets collected at various times of the day. Representative data periods and their assigned weights are provided in Table VIII-7. For instance, the sample gathered for the Late AM Off-Peak period is intended to represent typical traffic conditions between 8:00 AM and noon. Since the sample period’ s duration is 15 minutes and the actual period of time represented is 4 hours, the multiplication factor or weight assigned is 16, the number of 15 minute intervals in a 4 hour period.
3.Calculation of V olume Accuracy The Contractor shall compute volume accuracy as described in this subsection. Determine individual lane volume accuracy per period by calculating the percentage of absolute difference of the total volume measured by the detection system and the true volume computed, divided by the true volume for the period under consideration.805.02 TABLE VIII-7 Data Collection Periods Period Intended To Represent Duration Weight Early morning (predawn) [EM] 12:30 AM – 6:30 AM 15 minutes 24 Dawn [DA] 6:30 AM – 7:00 AM 30 minutes 2 AM Peak [AMP] 7:00 AM – 8:00 AM 15 minutes 4 Late AM Off-Peak [LAOP] 8:00 AM – Noon 15 minutes 16 Noon [NO] Noon – 1:00 PM 15 minutes 4 Afternoon Off Peak [AOP] 1:00 PM – 5:00 PM 15 minutes 16 PM Peak [PMP] 5:00 PM – 6:00 PM 15 minutes 4 Dusk [DU] 6:00 PM - 6:30 PM 30 minutes 2 Night [NI] 6:30 PM - 12:30 AM 15 minutes 24 Total Sum of Weights 96 956In Equation 1, EM represents the early morning period. The variable i represents a lane in a roadway and could vary from 1,…, N, where N is the maximum number of lanes on the roadway segment. Substitute other lane numbers and periods as necessary to determine the accuracy for each lane during each period (i.e., dawn, AM peak, late AM off peak, etc.). Variables used in the following calculations are identified as follows: VT = Total volume VD = Vehicle detection data (in this case, count data) GT = Ground truth measurement utilizing a reliable method approved by the Engineer V A = V olume accuracy
a.Equation 1 – Early Morning Lane V olume Accuracy Expressed In Percentage VAEM ,lni = 100 – |VTEM ,VD ,lni – VTEM ,GT ,lni | x100 ____________________ VTEM ,GT ,lni where: VAEM ,lni = V olume accuracy for early morning traffic conditions in the ith lane. VTEM ,VD ,lni = Total volume for the 15-minute early morning period using the vehicle detector in the ith lane. VTEM ,GT ,lni = Total volume for the 15-minute early morning period in the ith lane using human observation or another method approved by the Engineer. The period volume accuracy will be the arithmetic mean of the lane volume accuracy over all lanes. In Equation 2, EM represents the early morning period and N is the maximum number of lanes in the roadway segment under test. Substitute other periods as necessary to deter - mine the accuracy for each period (i.e., dawn, AM peak, late AM off-peak, etc.).
b.Equation 2 - Early Morning Period V olume Accuracy Expressed in Percentage where: VAEM = Average volume accuracy for early morning traffic conditions for all lanes on the roadway segment.805.02 VAEM =i = 1VAEM ,lni N N( Σ ) 957 VAEM ,lni = V olume accuracy for early morning traffic conditions in the ith lane. Calculate the roadway segment accuracy over all periods using Equation 3. Calculate the volume accuracy using Equation 2 for each individual period, multiplied by its corresponding weight, as shown in Table 1. Next, add the products for all periods and divide the sum by 96 to obtain the overall system accuracy.
c.Equation 3 – Total Roadway Segment Accuracy Expressed in Percentage where: VATotal = V olume accuracy for all lanes for all periods discussed in Table 1 VAEM = V olume accuracy for early morning traffic conditions VADA = V olume accuracy for dawn traffic conditions VAAMP = V olume accuracy for AM peak traffic conditions VALAOP = V olume accuracy for late AM off-peak traffic conditions VANO = V olume accuracy for noon traffic conditions VAAOP = V olume accuracy for afternoon off-peak traffic conditions VAPMP = V olume accuracy for PM peak traffic conditions VADU = V olume accuracy for dusk traffic conditions VANI = V olume accuracy for night traffic conditions Position the detector and configure the detection zones so that a vehicle is detected when 70% or more of the vehicle width is inside a lane, and not detected when 15% or less of the vehicle width is in the lane. Use the detection zone configuration to minimize the occurrence of a double count for the same vehicle, while ensuring that it will be counted at least once.
4.Calculation of Speed and Occupancy Accuracy Calculate speed accuracy as discussed in this subsection. Calculate occupancy in a manner similar to the speed computation methodology described below. The difference between the volume accuracy and speed accuracy computation is that the volume of a particular lane can be aggregated over a period of time, while speed cannot. For computing the accuracy of the detector speed measurement, the average speed readings obtained from the detection system are compared to ground truth values on a particular roadway segment. Equation 4 represents the ground truth average speed computation procedure for a particular lane during a specific time period. Equation 5 represents the average speed computation proce - dure for a particular lane during a specific time period using data gathered from the detection system. In Equations 4 and 5, the time period described is the early morning period, represented by EM, and the variable k represents a vehicle traveling on the roadway and could vary from 1,…, K, where K is the maximum number of vehicles in lane i during the time period under consid - eration. The variable i represents a lane in a roadway and could vary from 1,…, N, where N is 805.02 [VAEM x24+V ADA x2+V AAMP x4+V ALAOP x16+V ANO x4+V AAOP x16+V APMP x4+V ADU x2+V ANI x24] 96VATotal = 958the maximum number of lanes on the roadway segment. Substitute other lanes and periods as necessary and compute the accuracy for each lane for all time periods. Variables used in the following calculations are identified as follows: SA = Speed accuracy S = Speed of an individual vehicle veh = Vehicle
a.Equation 4 – Early Morning Average Ground Truth V ehicle Speed where: SAvg, EM, GT, lni represents the average ground truth vehicle speed for the ith lane during the early morning period. SEM, GT, lni , vehk represents the true speed for the kth vehicle in the ith lane during the early morning period using human observation or another method approved by the Engineer.
b.Equation 5 - Early Morning Average V ehicle Detector Speed Measurement where: SAvg, EM, VD, lni represents the average ground truth vehicle speed for the ith lane during the early morning period. SEM, VD, lni , vehk represents the true speed for the kth vehicle in the ith lane during the early morning period using human observation or another method approved by the Engineer. The lane speed period accuracy is computed as a percentage of the absolute difference of the average lane speed calculated using detection system data and the average lane true speed calculated in Equation 4 (or using another method approved by the Engineer), divided by average ground truth lane speed for the period. In Equation 6, EM represents the early morning period. The variable i represents a lane on a roadway and could vary from 1,…,N, where N is the maximum number of lanes on the roadway segment. Substitute other lanes as necessary to determine the accuracy for each period (i.e., dawn, AM peak, late AM off peak, etc.).805.02 SAvg, EM, GT, lni = k = 1SEM ,GT ,lni ,vehkK Σ1 K SAvg, EM, VD, lni = k = 1SEM ,VD ,lni ,vehkK Σ1 K 959 c. Equation 6 - Early Morning Lane Speed Accuracy Expressed in Percentage SAAvg, EM ,lni = 100 – |SAvg ,EM ,VD ,lni – SAvg ,EM ,GT ,lni | x100 ______________________ SAvg ,EM ,GT,lni where: SAAvg, EM ,lni = represents the average speed accuracy during early morning traffic conditions for all vehicles that traveled in lane i of the roadway segment. The period speed accuracy will be the arithmetic mean of the lane speed accuracy, computed using Equation 6, over all lanes. In Equation 7, EM represents the early morning period. The variable i represents a lane on a roadway and could vary from 1,…, N, where N is the maximum number of lanes on the roadway segment. Substitute data as necessary to determine the accuracy for each period (i.e., dawn, AM peak, late AM off peak, etc.).
d.Equation 7 – Early Morning Speed Accuracy Expressed in Percentage where: SAEM = represents the average speed accuracy during early morning traffic conditions for all lanes on the roadway segment. Calculate the roadway segment accuracy over all periods using the following equation. This equation is a weighted average to account for variations in each of the sample de - tection periods over the course of a 24-hour period. First, calculate the speed accuracy for each individual period using Equation 7. Next, multiply the individual period by its corresponding weight as shown in Table 1. Add the products for all periods and divide the sum by 96 to obtain the overall system accuracy.
e.Equation 8 – Total Roadway Segment Accuracy Expressed in Percentage where: SATotal = Speed accuracy for all lanes for all periods discussed in Table 1 SAEM = Speed accuracy for early morning traffic conditions SADA = Speed accuracy for dawn traffic conditions SAAMP = Speed accuracy for AM peak traffic conditions SALAOP = Speed accuracy for late AM off-peak traffic conditions SANO = Speed accuracy for noon traffic conditions SAAOP = Speed accuracy for afternoon off-peak traffic conditions SAPMP = Speed accuracy for PM peak traffic conditions SADU = Speed accuracy for dusk traffic conditions SANI = Speed accuracy for night traffic conditions805.02 SAEM =i = 1SAEM ,lni N N( Σ ) [SAEM x24+SADA x2+SAAMP x4+SALAOP x16+SANO x4+SAAOP x16+SAPMP x4+SADU x2+SANI x24] 96SATotal = 960805.03—Procedures The Contractor shall install, configure, and demonstrate a fully functional vehicle detection system to the Engineer. Furnish all equipment with the appropriate power and communication cables. Install the power cable and the communication cables according to the manufacturer’ s instructions. Neatly install and organize all cabinet accessories, connectors, surge suppression and communications connections for the VDS assembly on a 19” EIA rack mounted shelf in the closest ITS Controller Cabinet identified in the Plans. The Engineer must approve the layout and design of all connections and accessories mounted on the shelf for acceptance. Connect all field hardware and TOC components to the existing communication network, and provide all materials as specified in the Contract. Install all equipment according to the manufacturer’ s recommendations or as directed by the Engineer. Install the detector in a side-fire configuration, and mount the detector level from side to side. Verify that all detection zones are contained within the specified elevation angle according to the manufacturer’ s recommendations and that the VDS is capable of fully detecting all vehicles in up to 10 lanes. The con - figuration shall provide accurate collection of all data types as detailed in this specification. For VDS installations on a single pole, refer to the 45 foot steel pole requirements in Section 803. For VDS installations on a DMS structure or CCTV pole with lowering device, each VDS unit shall be installed with a universal mounting bracket and with a minimum 10 foot horizontal extension arm. Mount VDS so that it does not obstruct lowering devices on CCTV poles. The universal mounting bracket provided by the VDS manufacturer shall be adjustable on two axes for optimum alignment. The horizontal extension arm shall be constructed of galvanized steel; extension arms constructed of alternate materials may be submitted to the Engineer for consideration. The Contractor shall submit details of the horizontal extension arm to the Engineer for approval. The Contractor shall determine the appropriate mounting angle and mounting height for each VDS in - stallation location. Mounting locations shall be in accordance with manufacturer’ s recommendations unless otherwise approved by the Engineer. Submit records of the final mounting angles and heights to the Engineer. When installing a detector near metal structures, such as buildings, bridges, or sign supports, the Contractor shall mount and aim the sensor to ensure the detection zone is not under and does not pass through any structure to avoid distortion and reflection. The detection quality of the VDS shall not be degraded due to assembly movement and vibration after mounting and installation. The detector shall be factory calibrated to ensure compliance with all applicable standards, specifications, and requirements. The detector shall not require further adjustment after initial setup and calibration to ensure that no periodic calibration is required. Provide an interface to external equipment with a single connector. The connector shall provide power to the unit and allow generation of contact closure output pairs for interface with traffic controller inputs. The connector shall include serial communication lines for programming, testing, and interfacing with the modem at a minimum 9,600-baud rate. The serial port’ s data format shall be standard binary non- return to zero (NRZ) modulation with 8-bit data, 1-stop bit, and no parity. The Contractor shall supply a test cable and converter to connect the detector to a laptop computer for testing and configuration. Verify that the test cable and converter are compliant with current EIA-232 and Universal Serial Bus specification standards for protocol converters. The male DB-9 and USB connectors for laptop computers equipped with only a USB port shall support the automatic handshake mode, transmission rates of 230 kilobits per second (kbps), and remote wakeup and power management features. 805.03 961Verify that the test cable and converter are compatible with the operating systems recommended for the TOC central system software, and are USB powered. Crimp or solder the detector connector pins to the cable conductors. Assemble and test the cable prior to onsite installation and pulling. Provide service loops at all connections. Perform continuity tests on the detector’ s stranded conductors using a meter having a minimum input resistance of 20,000 W per volt and show that each conductor has a resistance of not more than 16 W per 985 feet of conductor. Measure the insulation resistance between isolated conductors and between each conductor, ground, and shield using a meter designed for measuring insulation resistance. The resistance must be infinity. Perform all resistance testing after final termination and cable installation, but prior to the connection of any electronic or field devices. Furnish and install all necessary power and communications cabling and terminations in the ITS control - ler cabinet for a fully functional system including operability at the cabinet, at the VDS detector, between the cabinet and the VDS detector, 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 the ITS system. Where a remote cabinet with TVSS is required, attach the cabinet to the pole with banding at a height of approximately 4 feet from the ground. All cabling from the main ITS controller cabinet to the remote cabinet and from the remote cabinet to the VDS shall be run inside the pole. The Contractor shall furnish and install a remote cabinet with Transient V oltage Surge Suppression (TVSS) on the VDS pole when the VDS is installed more than 100 feet from an ITS controller cabinet, or in accordance with the manufacturer recommendations, whichever is more stringent. Furnish and install TVSS to connect all data and power cabling for the VDS.
a.Testing Subject the equipment covered by these specifications to design approval tests (DATs), field accep - tance tests (FATs), VDOT TOC Integration tests (TOCITs), and system acceptance testing (SAT). The Contractor shall meet the requirements of the Department’ s test plan. The test plan can be found on the Department’ s website.
b.Training Upon completion of the work and at a time approved by the Engineer, the Contractor shall provide training by a qualified instructor to Department personnel in the proper operation and maintenance of the equipment. Department personnel shall receive training comparable to the equipment manufacturer’ s factory training for each new type of VDS equipment that has not previously been installed within the region. The minimum training shall be one 2 hour session for instruction of device operation and maintenance.
c.Warranty The VDS detectors, VDS cables and associated equipment and materials furnished, assembled, and installed shall have a manufacturer’ s warranty covering defects in assembly, fabrication and materials for a minimum of three (3) years from the date of final acceptance by the Engineer of all 805.03 962work to be performed under the Contract. If the manufacturers’ warranties for the components are for longer periods, then those longer period warranties shall apply. The manufacturer’ s warranties on VDS detectors and cables shall be fully transferable from the Contractor to the Department. These warranties shall require the manufacturer to furnish replace - ments for any part or equipment found to be defective during the warranty period at no cost to the Department within 10 calendar days of notification by the Department. Warranty periods shall begin on the date of final acceptance of the project by the Department.
805.04 Measurement and Payment
VDS Detectors will be measured in units of each and paid for at the contract unit price per each. This price shall include video detectors, installation kit with mounting brackets; horizontal extension arm, all required power and data cables. This price shall also include providing all operational software package(s) and firmware(s), supplies, support, personnel training, shop drawings, docu - mentation, testing, and incidentals necessary for a complete VDS system. The cost for furnishing and installing any required remote cabinets with TVSS shall be included in the per each unit price for VDS detector. VDS Composite Cable will be measured in units of linear feet and paid for at the contract unit price per linear foot. This price shall include composite cable, any operational software package(s) and firmware(s). Payment will be made under: —————————————————————————————— Pay Item Pay Unit—————————————————————————————— VDS Detector Each VDS Composite Cable Linear Foot—————————————————————————————— SECTION 806—ENVIRONMENTAL SENSOR STATIONS
806.01 Description
This work shall consist of furnishing and installing environmental sensor stations (ESS) that are fully compatible with the most recently installed ESS equipment within the respective Traffic Operations Center Region and as directed by the Engineer and according to these specifications.
806.02 Materials
a.Concrete shall conform to Section 217.
b.Reinforcing steel shall conform to Section 223.
c.Aluminum shall conform to Section 229 and shall be fabricated, welded, and inspected according to Section 407.805.03
Source: Virginia Road and Bridge Specifications, 2020 Edition. Pages 979–989 of 1,065.