641Radar Detection Systems

641.01 Description. This work shall consist of providing all labor, materials, equipment,

and incidentals necessary to furnish, install, test, trai n and operate Radar Detection Systems, including Signal Radar Detection Systems (SRDS) and In telligent Transportation Systems (ITS) Radar Detecti on Systems (IRDS). These systems will provide roadway monitoring capabilities via electromagnetic microwave radar signals through the air. The signals bounce off vehicles in their paths and the signal is returned to the detector. The returned signals are processed to determine tr affic parameters. All radar units shall be supplied from the same manufacturer per construction project.

641.01.1 Signal Ra dar Detection Systems . SRDS provide traffic parameters necessary

to the traffic signal controller operation for vehicle detection. Type 1 SRDS radar detection shall be used for basic vehicle detection at signalized intersections as described below in this specification. Type 2 SRDS radar detection shall have all of the functionality of the Type 1 SRDS stop bar detection with additional features described below in this specification. The SRDS shall utilize a matrix of radar signals for two-dimensional coverage and shall track vehicles through each type of detecti on’s specified Area of Coverage. The SRDS shall report real-time detection of both moving and stopped vehicles.

641.01.2 ITS Radar Detection Systems . IRDS shall provide data, including, but not

limited to speeds, volume, lane occupancy and classification.

641.02 Materials.

641.02.1 Radar Design. The IRDS and the SRDS stop bar microwave shall operate in

the 24.0 to 24.25 GHz frequency band. The advance radar has the option to either be in the 24 GHz band or in the 10.5 GHz band. Neither stop bar nor advanced radar shall interfere with any existing or proposed traffic signal control and Intelligent Transportation System (ITS) equipment. Should frequencies of other ITS equipment be in the same band, or conflict with detection, the Contractor shal l move and space the less critical ITS device, as designated by the Engineer so as not to interfere with vehicle detection. The radar units shall operate in all weather conditions and comply with the applicable standards stated in the NEMA TS 2-2003 standard for shock, vibration, and temperature. All units shall be rated for up to 95% relative humidity, non-condensing. The radar units shall be FCC certified under CFR 47, part 15.

641.02.1 1--Cabinet Interface Unit (CIU) Design. The CIU shall be a module that

provides power and communication to the radar sensors and/or signal controller through contact closure devices, Ethernet and/or the SD LC port of the signal controller. The CIU shall include all power cables, jumpers and terminal blocks needed to connect up to four

641.02.2 Area of Coverage - SRDS .

641.02.2 1--Stop Bar Radar Detection. Type 1 SRDS stop bar radar sensor shall track

vehicles through a field of view that extends out a minimum of 100 feet The Type 1 SRDS stop bar radar sensor shall be able to detect and report presence in lanes located within a minimum 100- foot from the face of the detector. Any variance of the detectable area shall be approved by the Engineer. The Type 1 SRDS stop bar radar sensor shall be able to detect up to four (4) lanes with eight (8) or sixteen (16) individual zones as indicated in the plans. Type 2 SRDS stop bar radar sensor shall have all the functionality of the Type 1 stop bar sensor with the addition of the following:  Type 2 SRDS stop bar radar sensor shall detect true presence of vehicles whether in motion or still without using Locking or Latching Algorithms.  Type 2 SRDS stop bar radar sensor shall report presence in lanes with a minimum 90 degree arc from the face of the detector.  Type 2 SRDS stop bar radar sensor shall be able to detect a minimum of ten (10) lanes.

641.02.2 2--Advanced Radar Detection . The Type 1 SRDS advanced radar sensor shall

be able to detect and report vehicle information such as range and speed when mounted within 50 feet of the center of the lanes of interest. Variance of this distance shall be approved by the Engineer per the application. The Type 1 SRDS advanced radar sensor shall be forward fired and be able to detect and report vehicle information when mounted at heights above the road surface, as per Manufacturer recommendations. The Type 1 SRDS advanced radar sensor shall be able to detect and report vehicles on the roadway up to 600 feet from the detector. The Type 2 SRDS advanced radar sensor shall have all the functionality of the Type 1 advanced with the following additions:  Type 2 SRDS advanced radar sensor shall be able to detect and report heavy vehicles on the roadway up to 900 feet from the detector.  Type 2 SRDS advanced radar sensor shall be able to detect Estimated Time of Arrival (ETA) for vehicles. The advanced radar sensors shall support user configurable upper and lower ETA filters for each zone. The sensors shall support the configuring of ETA filters in increments of 0.1 seconds.

641.02.3 Area of Coverage-IRDS. The IRDS's field of view shall cover an area with a

minimum detection range of six (6) feet from the IRDS and a maximum detection range of 250 feet from the IRDS.

641.02.4 Detection Zones--SRDS .

641.02.4 1--Stop Bar Detection . The stop bar radar sensors shall be able to detect and

report presence for vehicles at the stop bar. The sensors shall be able to detect and report presence in up to eight (8) or sixteen (16) individual zones as indicated in the plans. The number of lanes used and detection zones shall be set-up and selected from the Graphi cal User Interface and manually configured via software provided with the detection unit. The detection zones shall also have the ability to be auto-configure d by the software tool. Count zones shall also be able to be set up in the stop bar radar detection unit as a ‘spot’ type of radar detection zone. The software configuration tool included with the sensor shall allow all zones to be set up as required by the plans.

641.02.4 2--Advanced Detection. The advanced radar sensors shall be able to

simultaneously detect and report information from a minimum of 25 vehicles on the roadway when they are serially sequenced between the near and far boundaries. The number of lanes and detection zones shall be set-up and selected from the Graphical User Interface. The advanced radar sensors shall detect range, speed, and vehicle Estimated Time of Arrival (ETA) to the stop bar for vehicles or clusters of vehicles moving in the user-selected direction of travel. The detector shall also detect occupancy or density of the detection zones. The advanced radar sensors shall provide vehicle call and extend data on up to eight (8) channels that can connect to contact closure modules compliant with NEMA TS-1, NEMA TS-2, and 170/2070 controller cabinets.

641.02.5 Detection Zones--IRDS . The minimum number of detection zones defined

shall range from twelve (12) to 22, for simultaneous detection, as indicated in the plans. The range resolution of each zone shall be no greater than 1.3 feet, and the zone width shall be user defined within a range of six (6) to tw enty (20) feet for the area of coverage limits described above.

641.02.6 Capabilities - SRDS. Sensors shall not require roadway modification for

placement. The advanced detection should provide easy integration with the stop bar detection and vice versa into the same intersection to form one (1) method/system of detection. The radar sensors shall distinguish and omit wrong way traffic from activating an assigned detector output.

641.02.6 1--Stop Bar Detection. The stop bar radar unit shall be suitable for mounting on

roadside poles or mast arms and provide the following:

641.02.6 2--Advanced Detection. The advance radar unit shall be suitable for mounting

on signal pole uprights or mast arms and provide the following activation within the signal cabinet:

641.02.7 Capa bilities--IRDS. The IRDS shall be a true presence detector. It shall be

suitable for mounting on roadside poles or on overhead structure and provide the following:

641.02.7 1--Meas urement Accuracy . The following error levels shall be achievable and

demonstrated during testing: Parameter Error Percentage Volume ................................................................. 8% Average Speed ........................................... 10% or 5 mph Lane Occupancy .................................................. 20%

641.02.8 Environmental Conditions and Protection . The radar unit shall maintain

accurate performance in all weather conditions , including rain, freezing rain, snow, wind, dust, fog, and changes in temperature and light, including direct light on sensor at dawn and dusk. All radar sensors shall not require cleaning or adjusting in order to maintain performance. Except as stated otherwise here in, the equipment shall meet all its specified requirements during and after subjecting to any combination of the NEMA TS2-2003 standard and the following:

641.02.9 Mechanical. The radar sensors shall not exceed five pounds (5 lbs) in weight.

All external parts of the radar sensors shall be ultraviolet-resistant, corrosion resistant, and protected from fungus growth and moisture deterioration. The radar sensors shall be classified as wate rtight according to the NEMA 250 Standard. The enclosure shall conform to test criteria set forth in the NEMA 250 standard for type 4X enclosures. Each of the radar sensors shall be able to withstand a drop of up to five (5) feet without compromising its functional and structural integrity. The sensor shall not require adjustments to maintain performance unless roadway geometry changes. The radar sensors shall be mounted directly onto a mounting assembly fastened to a pole or other solid structure. The assembly shall provide the necessary degrees of rotation to ensure proper installation. The assembly shall be constructed of weather-resistant materials and shall be able to support a 20-pound load.

641.02.10 Electrical. The radar sensors shall consume less than 10 W and shall operate

with a DC input between 12 VDC and 28 VDC for IRDS and 9 VDC and 32 VDC for SRDS, or POE. POE injectors shall be approved by the Engineer. Surge Protection Devices (SPD) shall be provided to protect the equipment from surges in the radar sensors 24 VDC power supply and the signal line RS232, RS 485, or Ethernet communications wiring. Surge suppression shall be UL 1449 listed and meet all requirements of Subsection 722.12 for surge protection devices.

641.02.11 Radar Design--SRDS. The radar units shall be designed to provide detection

over a large area and to discriminate lanes. The circuitry shall be void of any manual tuning elements that could lead to human error and degraded performance over time. The radar shall not rely on temperature compensation circuitry to maintain transmit frequency stability. The bandwidth of the transmit signal of the radar sensor shall not vary by more than one percent (1%) under all specified operating co nditions and over the expected life of the sensor. The stop bar radar sensor shall provide at least four (4) RF channels so that multiple units can be mounted in the same vicinity without causing interference between them.

641.02.12 Communication Ports. The radar sensor shall have Ethernet, RS-485, or RS-

232 ports for communication from the unit to the cabinet. The IRDS shall be upgradable (optional) to include integral 10/100 Base-T Ethernet supporting TCP, UDP, IP, ARP, ICMP. Within the cabinet, all remote communications to Ethernet switches shall be IP Ethernet with RJ-45 connections. For SRDS, any extern al device needed to convert serial to IP Ethernet within the cabinet for remote communications shall be provided with the radar sensor unit at no additional cost. The radar sensor shall support the upload of new firmware into the unit’s non-volatile memory. The sensor shall support user defined or automatic configuration of the com ports.

641.02.13 Radar Communication Cabling. The sensor communication cable shall be

provided between the sensor and the cabinet. Up to 100 feet of length of communication cable shall be included in the cost of the sensor unit. Anything over 100 feet of cable shall be paid per the unit cost of the pay item for Radar Detection Communication Cable, as shown on the plans or details. The manufacturer is responsible for obtaining plan sets and ensuring cable lengths are properly measured and accounted for in the bid price for each sensor unit and as shown on the plans. The cable shall have a single continuous run with no splices. The cable shall be terminated only on the two (2) farthest ends of the ca ble. The communication cable shall meet the following specifications:  Ethernet shall be double shielded, outdoor rated direct burial Ethernet cable with runs not exceeding 250 feet. If ranges exceed 250 feet, extenders may be used at the approval of the Engineer.  The RS-485 conductors shall be a twisted pair and not exceed 2000 feet. The RS- 232 and RS-485 conductors shall have nominal capacitance conductor to conductor of less than 71 pF/Ft at 1 Khz. The RS-232 and RS-485 conductors shall have nominal conductor DC resistance of less than 16.5 ohms at 68 ˚F.

641.02.14 Electrical Isolation and Surge Protection. All communication and power

lines shall be installed using surge protectio n devices (SPD), as stated in specification Subsection 722.12.

641.02.15 Configuration--SRDS. The radar sensor can either have an on screen

interactive or automatic configuration setup. The auto setup shall automatically define traffic lanes, stop bars, and detection zones without requiring user intervention. The auto-configuration process shall automatically define traffic lanes or detection zones by detecting the relative position of vehicles with the sensor’s field of view. The radar sensor shall also allow the ability of the user to manually adjust the sensor configuration. The graphical inte rface shall operate on a MS Windows TM based software. The software shall automatically negotiate the baud rate, the correct serial communication port, operate over a TCP/IP connection, support dial-up modem connectivity, give the operator the ability to save/back up the sensor configuration to a file or load/restore the configuration from a file, and provide a virtual connection option so that the software can be used without connecting to an actual sensor.

641.02.15 1--Stop Bar Detection. The stop bar sensor shall support the configuring of

lanes, stop bars, and detection zones in 1- foot increments and as stated in these specifications for lane detection. 641.02.15.2--Advanced Detection. The advance radar sensor can either have an on screen interactive or automatic setup. The auto setup shall have a method for automatically configuring the sensitivity of detection between 5-foot and 7.5-foot increments. The advanced radar sensor shall support the configuring of zones in at least 5-foot increments. The advanced radar sensor shall support user configurable high-speed and low-speed detection filters for each zone. These spee d filters shall be configured in 1-mph increments. 641.03-- Construction Requirements . Radar Detection System sites shall be constructed to withstand and operate in sustained winds of up to 90 mph and a 30% gust factor. For projects that are in areas with higher wind standard, the higher standard shall be used.

641.03.1 SRDS Installa tion Requirements. The stop bar and advanced radar sensors

shall be mounted as shown in the plans or per the manufacturer’s recommendations on poles or structures. Mounting brackets shall be provided with the radar sensor and shall be attached to the pole, structure or mast arm with approved stainless steel bands. The Contractor shall install de tector units on a pole, stru cture, or mast arm at the manufacturers recommended height above the road surface or as shown in the plans so that the masking of vehicles is minimized and that all detection zones are contained within the specified elevation angle as suggested by the manufacturer. Unused conductors in the communications cable shall be ground or terminated in the cabinet in accordance with the manufacturer’s recommendations. Terminated conductors shall be individually doubled back and taped, then loosely bundled and secured if not specifically called out in the manufacturer’s recommendations. If required by the plans and installation methods, impedance terminatio n and testing of multi drop runs shall be required per RS485 multidrop standards.

641.03.1 1--Cabinet Interface Unit . Where required, the Contractor shall install any

contact closure modules and cabinet interface modules needed to connect the sensor(s) to the signal controller within the signal cabinet environment shown in the plans. Sensors (up to 4) shall be connected to the cabinet interface module and the cabinet interface unit shall be connected to the signal controller per the manufacturer’s requirements for the particular signal cabinet environment shown in the plans at no additional cost, or as approved by the Engineer.

641.03.2 IRDS Installation Requirements. All equipment shall be installed according

to the manufacturer’s recommendations, the plans and as follows:

641.03.3 Radar Sensor Test Requirements. The Contractor shal l conduct a Project

Testing Program as required below. All cost s associated with the Project Testing Program shall be included in overall contract prices; no separate payment will be made for any testing. The Contractor shall be responsible for planning, coordinating, conducting and documenting all aspects of the Project Testing Program. The Project Engineer and/or the Project Engineer’s representative are only responsible for attending and observing each test, and reviewing and approving the Contractor's test results documentation. The Project Engineer and/or the Project Engineer’s representative reserve the right to attend and observe all tests. Each test shall fully demonstrate that the equi pment being tested is clearly and definitely in full compliance with all project requirements. Test procedures shall be submitted and approved for each test as part of the project submittals at the request of the Engineer. Test procedures shall include every action necessary to fully demonstrate that the equipment being tested is clearly and definitively in full compliance with all project requirements. Test procedures shall contain documentation regarding the equipment configurations and programming. No testing shall be scheduled until approval of all project submittals and approval of the test procedures for the given test. The Contractor shall provide all ancillary equipment and materials as required in the approved test procedures. The Contractor shall request in writing the Project Engineer's approval for each test occurrence a minimum of 14 days prior to the requested test date. Test requests shall include the test to be performed and the equipment to be tested. The Project Engineer reserves the right to reschedule test request if needed. All tests shall be documented in writing by the Contractor in accordance with the test procedure and submitted to the Project Engineer within seven (7) days of the test. Any given test session is considered incomplete until the Project Engineer has approved the documentation for that test session. All tests deemed by the Project Engineer to be unsatisfactorily completed shall be repeated by the Contractor. In the written request for each test occurrence that is a repeat of a previous test, the Contractor shall summarize the diagnosis and correction of each aspect of the previous test that was deemed unsatisfact ory. The test procedures for a repeated test occurrence shall meet all the requirements of th e original test procedures, including review and approval by the Project Engineer. The satisfactory completion of any test shall not relieve the Contractor of responsibility to provide a completely acceptable an d operating system that meet s all requirements of this project. Test shall include verification of detection for each lane of traffic or zone per site.

641.03.4 Standalone Acceptance Test (SAT). The Contractor shall perform a complete

SAT on all equipment and materials associated with the field device site, including but not limited to electrical service, conduit, pull boxe s, communication links (fiber, leased copper, wireless), control cables, poles, etc. A SAT shall be conducted at every field device site. Where applicable, a SAT shall be conducted fo r a fully installed and completed connection to the designated Traffic Management Center (TMC) or central data/video collection site. The SAT shall demonstrate that all equipment and materials are in full compliance with all project requirements and fully functional as installed and in final configuration. The SAT shall also demonstrate full compliance with all operational and performance requirements of the project. All SATs will include a visual inspection of the cabinet and all construction elements at the site to ensure they are compliant with the specifications.

641.03.5 Warranty . The Signal Radar Detection sensors shall be warranted to be free of

manufacturer defects in materials and workmanship for a period of one (1) year from the date of Final Acceptance. Equipment covered by the manufacturer’s warranties shall have the registration of that component placed in the Department’s name prior to Final Inspection. The Contractor shall be responsible for ensuring that the vendors and/or manufacturers supplying the components and providing the equipment warranties recognize the Department as the original purchaser and owner/end user of the component from new. During the warranty period, the supplier shall repair or replace with new or refurbished material, at no additional cost to the State, any product containing a warranty defect, provided the product is returned postage-paid by the Department to the supplier's factory or authorized warranty site. Products repaired or replaced under warranty by the supplier shall be returned prepaid by the supplier. During the warranty period, technical support shall be available from the supplier via telephone within four hours of the time a call is made by the Department, and this support shall be available from factory certified personnel. During the warranty period, updates and corrections to control unit software shall be made available to the Department by the supplier at no additional cost.

641.03.6 MDOT Employee Training. The supplier of the radar detection sensors shall,

at a minimum, provide an 8-hour operations and maintenance training class with suitable documentation for up to eight (8) persons selected by the Department, if shown and quantified in the plans. The training shall be at the discretion and approved by the Engineer. The training must include both classroom style training and hands-on training in the field of the maintenance and troubleshooting procedures required for the system. The training should also consist of a hands-on demonstration of all software configuration and functionality where applicable. The operations and maintenance class shall be scheduled at a mutually acceptable time and location.

641.03.7 Maintenance and Technical Support . The supplier shall maintain an adequate

inventory of parts to support maintenance and repair of the radar detection sensor(s). The manufacturer of the radar detection system must provide, and have a parts support system capable of providing parts for a period of five (5) years from the date of system acceptance. Spare parts shall be available for delivery w ithin 30 days of placement of an acceptable order at the supplier's then current pricing and terms of sale of said spare parts. The suppliers shall maintain an ongoing program of technical support for the Radar Detection System. This technical support shall be available via telephone or via personnel sent to the installation site upon placement of an acceptable order at the supplier's then current pricing and terms of sale of said technical support services. 641.04--Method of Measurement. The Radar Detection System, of the type specified, will be measured as a unit per each. Radar Detection Communication Cable will be measured by the linear foot, measured horizontally along the conduit. The first 100 feet of Radar Detection Communication Cable shall be included in the pay item. Any addition linear foot will be paid per the cabling pay item. Radar Detection Training will be measured per lump sum.

641.05 Basis of Payment. Radar Detection System of the type specified, measured as

prescribed above, will be paid for at the cont ract unit price bid per each, which price shall be full compensation for furnishing all materials, construction installation, connecting, testing, for all equipment, tools, labor and in cidentals required to complete the work. Work shall include furnishing, installing, system inte gration, testing and training (if required) of complete radar sensor system that includes the unit, the first 100 feet of the composite power/communications cabling between the unit and the cabinet, surge protection devices, communication converters (if required), all co nduit, risers and weatherhead between the radar sensors and the cabinet, interconnection wiring, power supply, connections to support structures (includes all incidental components, attachment hardware, mounting brackets, mounting arms, bolts, or any other items to moun t the radar sensor as intended), satisfactory completion of testing and training requirements and all work, equipment and appurtenances as required to effect the full operation including remote and local control of the radar site complete in place and ready to use. The price bid shall also include all system documentation including: shop drawings, operations and maintenance manuals, wiring diagrams, block diagrams and other material necessary to document the operation of the radar sensor. Cabinet Interface Units shall be provided, and installed as specified in the plans, which shall be inclusive of any testing, connections, terminations, and testing required for interfacing the radar sensors and signal controller within the signal cabinet environment. Radar Detection Communication Cable will be paid at the contract unit price per linear foot, which price shall be full compensation for all labor, materials, equipment tools, furnishing, installing, system integration, conn ections, testing, and all incidentals necessary to complete the work. Radar Detection Training, measured as prescrib ed above, will be paid for as a lump sum unit price. Payment will be made under: 641-A: Signal Stop Bar Radar Detection, __ Sensor, Type __ - per each 641-B: Signal Advanced Radar Detection, __ Sensor, Type __ - per each 641-C: ITS Radar Detection, __ Sensor - per each 641-D: Radar Detection Communication Cable - linear foot 641-E: Radar Detection Training - lump sum SECTION 642 - MAGNETOMETER DETECTION SYSTEM (MDS)

642.01 Description. This work consists of furnishing all components and materials

required to enable a wireless, battery-powered Magnetometer Detection System that detects vehicles and bicycles on a roadway using battery powered magnetometer type sensors with wireless communications to transmit detection information. The system shall detect vehicles on a roadway using only changes in the earth’s magnetic field and provide detection outputs to a roadside master device before the data is relayed to a freeway cabinet, a local traffic controller cabinet, a Central Soft ware System, and/or data server as required as required by the application. The applica tion of the MDS shall be shown in the plans or project specifications. These specifications c over both intersection presence-based vehicle detection used for traffic controller input, as well as freeway system or advanced system