1240VEHICLE DETECTOR SUBSYSTEM

1240.1DESCRIPTION—This work is to furnish and install a complete Vehicle Detector Subsystem (VDS)

consisting of a microwave vehicle detector , Bluetooth vehicle detector , or radio-frequency identification

1240.2MATERIAL—

hardware, cables and conduits, installation, and integration. Provide field-hardened subsystems for long - term freeway deployment where it is typically subject to wide daily and seasonal temperature swings, wind gusts, typical road vibrations. Provide all solid state electronic components and circuits. Minimize the possibility that failure of any one component or module causes total subsystem failure. Failure of one component or module must not cause the failure of any other component or module.

wave principle (FMCW) and determines vehicle presence by the return or reflection of radar output waves, which are converted to a data signal that corresponds to vehicle presence. Provide MVD that is easy to install and remove and is fully programmable to support a variety of applications. Comply with all applicable mandatory NTCIP-1209 requirements, and optional requirements defined by the following User-Need (UN) or Functional Requirement (FR) section numbers:

UN section # FR section # Description 2.5.5.1 3.5.1.1 Get sample end time 2.5.5.1 3.5.1.2 Get volume 2.5.5.1 3.5.1.3 Get percent occupancy 2.5.5.1 3.5.1.4 Get speed 2.5.5.1 3.5.1.5 Get zone status

Provide all solid state electronic components and circuits. Provide MVD to operate without degradation in performance under temperature range of -40F to +165F, and relative humidity of lower than 95%, non - condensing, without auxiliary heating or cooling. Provide a true presence MVD, which can provide presence, volume, lane occupancy and speed information on a minimum of eight detection zones. Make information available via serial communications lines. Provide user-defined 7-foot resolution for each zone range limit. Provide MVD with area of detection defined as an oval shaped beam, with minimum detection range and coverage angles as follows:

• Elevation Beam Width 45 degrees. • Azimuth Beam Width 12 degrees. • Range 10 feet to 200 feet.

Furnish a MVD that complies with the limits for a Class A digital device, according to Part 15 of the FCC rules or the appropriate Spectrum Management Authority. Provide MVD that does not interfere with any adjacent equipment. Where measurement energy is radiated, the radiated power must not exceed 10 milli- Watts. Furnish MVD with processor that performs and generates, at minimum, the following statistical calculations over a set time duration: average speed, percent occupancy, vehicle count. Provide MVD that is capable of resolving closely spaced vehicles and does not detect vehicles that remain stationary for over 5 minutes within a detection zone. Enable the operator to select if data is output as contact closures emulating standard loop detector outputs, and/or as accumulated statistical data using detector serial ports. Provide time duration for the statistical calculations that are user -adjustable from 10 seconds to 3 ,600 seconds. Provide MVD that produces data in ASCII format. Provide full description of the protocol used for packaging the transmitted data, and full listing of what and how certain information may be queried. Store all VDS configurations data and all traffic parameters data within an internal, nonvolatile memory. Store all

collected data within the MVD unit for a minimum of 7 days, regardless of whether or not th e data was already transmitted. Furnish MVD that meets or exceeds the following accuracy requirements:

• Identify vehicle presence within each detection zone with a minimum accuracy of 95%

• Detect average travel speed with a minimum accuracy of 90%, independent of the vehicle's direction of travel through the detection zone.

• Maximum permissible error of 5% in the detection of the direction and magnitude of radial speed and 10% in the case of transverse speed.

Provide MVD that operates using nominal input voltage of 12 volts direct current (VDC) to 24 VDC and less than 8 watts and is compatible with all power requirements in Section 1201.2(b).

format. Furnish terminal server to convert signals to Ethernet format where required.

Detection targets are the vehicle-mounted RFID transponder tags used in the E-ZPass Interagency Group

Provide RTVD that operates on 120 volts alternating current ( VAC) or is provided with relevant power conversion module that accepts 120 VAC power supply and is compatible with Section 1201.2(b). Provide a RTVD that polls the transponder tags in vehicles passing through related detection zone, detects the transponder identification information responded by the transponder tags, timestamps, and transmits the detected information to the TMC/RTMC for further processing. Provide detection antenna, related antenna cable, and related processing unit that operates without degradation in performance under temperature range of -40F to +165F, and relative humidity of lower than 95%, non-condensing, in absence of auxiliary heating or cooling. Provide detection antenna that radiates polling signal of no more than 4 milli-Watts per square centimeter, has a detection range of minimum 15 feet when placed above the center of a 12-foot-wide lane, and has a coverage angle of greater than 60 degrees to allow detection from both lanes when placed above the center of two 12 -foot-wide lanes. Provide detection antenna with front surface measuring not more than 20 inches at each side and is not more than 3 inches thick. Unless other length is specifically required, provide antenna cable that supports connection distance between a detection antenna and related processing unit of up to 200 feet. Furnish a RTVD that complies with the limits for a Class A digital device, according to Part 15 of the FCC rules or the appropriate Spectrum Management Authority. Provide detector that does not interfere with any adjacent equipment. Furnish RTVD that meets or exceeds the following accuracy requirements:

• Identify vehicle presence within each detection zone with a minimum accuracy of 95%

• Detect average travel speed with a minimum accuracy of 90%, independent of the vehicle’s direction of travel through the detection zone.

• Maximum permissible error of 5% in the detection of the direction and magnitude of radial speed and 10% in the case of transverse speed.

detection antennas; provide blank cover plate on opening for all unused module slots. Provide RTVD that supports F2C data rate of up to 500Kbps, and properly interacts with and processes data from up to eight streams of transponder tags all moving at up to 100 m iles per hour and spaced as close as 50 feet apart, within respective lanes. Provide processing unit that is equipped with at least one EIA RS232 port for configuration and monitoring, and at least one RJ45 ports for 10Mbps IP-based F2C communication.

serial and internet protocol (IP) communications platform) for field-to-center (F2C) communication. Provide

RTVD that includes one or more microwave transponder -based vehicle detection antennas and a related processing unit (tag reader).

Bluetooth signals along the roadway. Provide BVD equipped with a standard Class 1 Bluetooth Antenna at minimum and able to simultaneously detect at least four lanes of traffic when placed along the shoulder of the roadway. Provide BVD with the ability to be powered through utility power, solar power, battery power, and PoE as outlined in the contract documents. Provide a BVD having a minimum operating range of -22F to +145F and be able to connect to an existing net work or communicate over a cellular (CDMA) network. The BVD must have onboard storage which can store all collected data for a minimum of 1 year. Provide a BVD which has the capability of GPS location. The BVD must have a MTBF of 90,000 hours, minimum.

in a rugged weatherproof box and seal to protect the unit from wind, dust and airborne particles, and exposure to moisture. Weatherproof any control cable connection from the housing. The maximum total weight of the detector assembly is 20 pounds, excluding any batteries. Provide mounting assembly consisting of all painted steel, stainless steel, or aluminum construction, and supporting a load of a minimum 20 pounds. Excluding the sensing surface, construct housing of aluminum, stainless steel, NEMA 4X rated polycarbonate, or steel with a corrosion-resistant finish. Furnish housing and mounting arrangement to withstand winds of 100 miles per hour with a 30 % gust factor, and to withstand vibration of up to 0.03 inch total excursion from 5 Hz to 30 Hz, and peak random vibrations of 5G’s from 30 Hz to 1,000 Hz. For MVD, provide mounting hardware assembly to incorporate a ball-and-socket joint or other approved mechanism that can be tilted in both axes, then locked into place, to provide the optimum area of coverage. Provide mounting for MVD to be installed in either a “side -fire” orientation, whereby the detector is mounted on the side of the roadway and projects a detection area perpendicular to the roadway, or “forward- looking” orientation, whereby the detector is m ounted above the roadway, aimed downward, and projects a detection area parallel to the roadway. For BVDs, provide a sealed, waterproof, and tamperproof enclosure with has a locking mechanism and is capable of being chained or banded to structures along the roadway if necessary.

installed on a PC or laptop computer at a TMC/RTMC. Furnish software to allow an operator to program, operate, and read current status of all VDS features and functions using the laptop, PC or TMC/RTMC workstation. Provide software to display detection zones and allow control of all detection zone parameters using a simple graphical user interface (GUI). Provide software that enables operators to configure, maintain, operate, setup, calibrate, and perform diagnostics for each detector location. Save all configuration data on the PC or laptop at the TMC/RTMC workstation. Provide detector with the capability to self-tune, and to allow manual calibration via vendor-supplied software. Provide software with the capability to perform autocalibration and autoconfiguration.

1240.3CONSTRUCTION—

minimum height of 17 feet 6 inches above road surface. Where installing MVD in side-fire orientation, mount the detector at a height that minimizes the masking of vehicles. Install MVD in accordance with the manufacturer’s recommendations, such that all detection zones are contained within the specified elevation angle. Provide mechanical means to adjust vertical and horizontal detector aiming angles, and to lock the detector aiming position securely. Provide means to double lock the final aiming position which is not prone to loosening or drifting when subject to road vibration. For Side-Fire applications configure the MVDs to collect and send traffic data for traffic in both directions, for at least eight traffic lanes or as indicated, and within the coverage limitations of the MVD at the installed position. For overhead, forward looking configurations, mount the MVD over the center of the desired lane, or as directed. Configure and integrate the MVD into the Transportation Sensor System (TSS), travel time,

or central control software at the related TMC/RTMC and any additional PCs or Laptops as directed by the Representative.

allow for aiming adjustments. Provide detector cable that is flexible and rated for outdoor use. Provide weatherproof connectors for external connections between the cable and the detector. Install single, continuous run signal and control cable without splice between a detector assembly and related ITS enclosure.

or as specified. Provide mechanical means to adjust vertical and horizontal detector aiming angles, and to lock the detector aiming position securely. Provide means to double lock the final aiming position which is not prone to loosening or drifting when subject to road vibration.

allow for aiming and height mounting adjustments. Install single, continuous run antenna cable without splice between a detector antenna and related communications enclosure. Provide detector cable that is flexible and rated for outdoor use. Provide weatherproof connectors for external connections between the cable and the detector antenna.

technology. This permission is a requirement for the procurement of the related products. Provide provisions to address any and all privacy concerns as identified by the E-ZPass IAG, and as required to obtain permission to utilize the RFID tag reading equipment. Coordinate with the Representative to obtain permission before procurement of RTVD.

recommendations for maximum detection along the roadway, including height, distance from farthest travel lane and security. Ensure all cabling is terminated according to the contract documents and as specified by the manufacturer.

1240.4MEASUREMENT AND PAYMENT—

Includes wiring, connectors, detector, mounting, housing, cabling, software, terminal server, grounding, installation, and integration work for a complete subsystem.

• 50% of payment will be made upon complete installation of VDS

• 30% of payment will be made upon completion of the standalone acceptance tests as specified in Section 1201.3(b).

• 20% of payment will be made upon successful completion of the 60 -day test as specified in Section 1201.3(b).

Completion of test includes completion of training, submission of all manuals and documentation as required, and completion of all final inspections as required by the Representative.