SPECIAL SPECIFICATION 6296 Fog Detection System

Transcription

1 2004 Specifications CSJ , etc. SPECIAL SPECIFICATION 6296 Fog Detection System 1. Description. Furnish and install a fog detection system at the location shown on the plans. The fog detection system will consist of a Remote Weather Information System (RWIS), and LED Fog Pavement Markers place within the limits shown on the plans. Furnish an RWIS system with the capabilities to monitor weather conditions at the locations shown on the project plans. The RWIS system will be specifically designed for monitoring and displaying pavement surface conditions, pavement temperature, chemical percent concentration, subsurface temperature, roadway video images, traffic counts, and atmospheric conditions. Furnish LED Fog Raised Pavement Markers with built in environmental sensors that triggers the LED s when fog is present 2. Materials. Materials for the RWIS system will consist of the following: Furnish an RWIS system with the capabilities to monitor weather conditions at the locations shown on the project plans. The RWIS system will be specifically designed for monitoring and displaying pavement surface conditions, pavement temperature, chemical percent concentration, subsurface temperature, roadway video images, traffic counts, and atmospheric conditions. Provide an RWIS system that provides 8 color still from video images of the roadway surface. The information from the RWIS station will be collected and archived on the existing TxDOT RWIS server system for use in TxDOT maintenance operations. The system will include all hardware, software, and licenses to operate as follows: Atmospheric sensors will measure their respective weather parameters and communicate the signals from each to the RPU. A Pan-Tilt-Zoom (PTZ), low light, color, snapshot video camera shall capture video images and transfer the images to the RPU. Optionally, the RWIS will be able to collect and display data from an active surface sensor

2 The RPU shall utilize a Linux based operating system, and be capable of multitasking operations to optimize data acquisition from all connected devices. The RPU shall process and temporarily store the output from the camera(s), traffic counters, and atmospheric sensors. The RWIS server will poll each RPU on a scheduled basis via communications telemetry as specified in the project plans. The RPU shall respond to the poll and transfer all of its data and images to the RWIS server. All data transfers between the RWIS server and RPUs shall be compliant with the most current Federal standard NTCIP ESS protocols. The RWIS server system shall store the RWIS data and video images in a standard SQL Server database for access by DOT users on any PC connected to the DOT statewide network running the Internet Explorer web browser. A 24-hour pavement specific weather forecast shall be provided by the RWIS vendor for display by the server as an advanced ice/snow control-planning tool for DOT maintenance personnel. The RWIS user displays will include all sensor, forecast and video data in a browserbased data display format. B. RWIS Remote Processing Unit Furnish and install a tower mounted RPU electronics package with enclosure on a concrete foundation as shown in the project plans. Install 110 VAC service to the RPU power disconnects. Primary power should be installed to the RPU and fused for 20 amps. with voltage surge protection. Provide an RPU that will operate in a range of VAC at Hz and will use not more than approximately 50 Watts of continuous power (excluding options). Furnish RPU hardware and software supplied for the project that will meet the following technical specifications. RPU software shall utilize a Linux based operating system, and be capable of multi-tasking operations to optimize data acquisition from all connected devices. The RPU will gather data from all connected sensors process store and transmit this data to the RWIS server upon polled request. Each RPU will be capable of collecting data from the following sensors: 1 to 8 Passive surface sensors that are hardwired 1 to 8 Wireless outpost passive surface sensors 1 to 8 Subsurface sensors that are hardwired 1 to 8 Wireless outpost subsurface sensors 1 to 8 Active surface sensor heads that are hardwired 1 Air temperature/relative humidity sensor

3 1 Hardwired mechanical wind speed/direction sensor or 1 heated ultrasonic wind speed/direction sensor 1 Wireless mechanical or ultrasonic wind speed/direction sensor 1 Weather identifier and visibility sensor or 1 optical weather identifier or 1 yes/no precipitation sensor or tipping bucket rain gauge 1 Forward scatter visibility sensor 1 Barometric pressure sensor 1 Solar radiation sensor 1 Water level sensor 1 Ultrasonic snow depth sensor 1 Ice Camera 1 to 2 Pan-Tilt-Zoom low light, color, still frame video cameras or 1 to 2 fixed, zoom, low light color video cameras 1 Remote traffic microwave sensor (RTMS) 16 Wireless in-pavement permanent traffic count stations. Furnish RPU with communication capabilities that utilize the most current published Federal Standard NTCIP-ESS protocol, with some manufacturer-specific objects. While the server will use dial-up telephone communication to communicate with the new RPU as proposed, the RWIS system will also possess the capability to be polled via one of the following communications modes; Ethernet, PPP dial-up over telephone, PMPP leased line, PMPP VHF/UHF 2-way radio, PMPP spread spectrum radio, or PMPP serial fiber optic. Provide and RPU that will incorporate watch-dog circuitry and monitor its own operation and reset itself if the RPU software enters an indeterminate state. The RPU will also have the capability to be reset by a user administrator from the server. Furnish and RPU designed with an 8-slot card cage with ISA back plane utilizing a ZFx86 PC-on-a-Chip. Memory shall be a flash drive card with 64 MB of flash memory and 32 MB of RAM memory. Analog inputs will include 20 differential and 11 single ended channels, with some dedicated to individual sensors. There will be a total of 10 serial ports available selectable to either EIA-232 or RS-422/485, half or full duplex. These serial ports are for system maintenance and device interfaces, using baud rates selectable from 300 to Kbps. Provide an RPU designed to utilize extensive lightning protection for all channels and serial ports including auto-reset circuit breakers for power, Tran sorbs and gas discharge tubes. All RPU electronics shall provide stable operation over a temperature range of -40 C to 70 C and 0-90% RH non-condensing. Provide an RPU enclosed inside a NEMA 4 lockable aluminum enclosure that is resistant to damage by weather and vandals. It will be mounted on a freestanding, non-climbable, corrosion resistant, aluminum tower. The 30 ft. tower is to be equipped with a lockable

4 fold-over device to facilitate servicing the atmospheric sensors. RPU software configuration will be performed by PC computer with browser connected to the RPU Ethernet port. Furnish an RPU capable of upgrade via software algorithm and electronic interface to control automatic firing of a Fixed Anti-icing Spray Technology (FAST) system. The RPU software algorithm will be user adjustable to fine-tune the firing of the FAST system to the site winter road conditions. C. Classifying Precipitation Sensor. Provide and install a classifying precipitation sensor approximately 8 ft. above ground on the RWIS tower structure. This sensor will function as a precipitation classifier, and a precipitation rate meter. The sensor will be able to differentiate between rain, snow, and drizzle as well as to measure actual precipitation rates as water equivalent. Furnish a precipitation sensor that will have a rain dynamic range of to 118 in. per hr. It will measure rain accumulation from to 39 in., with a rain accumulation accuracy of 5%. The sensor will have a snow dynamic range of to 11.8 in./hr. water equivalent. It shall measure snow accumulation from to 39 in. water equivalent, with a snow accumulation accuracy of 10%. Provide a precipitation sensor with housing will be all weather and ice-proof with heated optics to prevent ice, dew or frost buildup. Normal operating temperature range will be from -40 C to 50 C. D. Air Temperature and Humidity Sensor. Furnish an Air Temperature/Relative Humidity Sensor that will have an air temperaturesensing element that operates over the temperature range of -40 C to 80 C. The relative humidity sensing element will be of the human hair type and have a measuring range of 10 to 100% RH. The operating temperature range will be -35 C to 70 C. Provide an Air Temperature and Humidity Sensor that calculates system dew point by the RPU from the air temperature and relative humidity. Both atmospheric sensing elements will be mounted on the RWIS tower at the standard meteorological height of approximately 6 ft. above ground level in a solar/wind-radiation shield. The combined sensor will operate to specifications at cable lengths up to 150 ft. from the RPU enclosure. E. Passive Pavement Sensor. Supply and install passive sensor(s) as shown on the project plans. Provide sensors with a single solid state electronic device that is installed in the roadway or bridge deck pavement at the locations shown on the plans. Place sensor(s) in exact locations determined by the Engineer with guidance from the equipment supplier. The sensor will come with a lifetime warranty. Provide sensor(s) constructed of materials that have thermal characteristics similar to common pavement materials. The top of the sensor will approximate the roadway pavement color and texture. It will be installed with epoxy sealer so the top is flush with the surrounding roadway surface. The sensor shall be thermally passive, providing stable operation over a temperature range from -40 C to 80 C. Weather conditions, traffic, or ice control chemicals shall not degrade its performance. The sensor will be supplied with 150 ft. or 300 ft. of attached molded cable that is waterproofed and sealed as an integral part of the assembly. Each sensor shall be capable of operating at extended cable lengths up to

5 5000 ft. from the RPU by splicing to direct burial sensor extension cable. The sensor will electronically sample the following pavement parameters: Surface temperature at the sensor head. Dry pavement condition. Wet pavement condition above 0 C. Pavement status information. In addition, the pavement sensors will supply data for the RWIS to determine the following pavement surface conditions when sufficient water is present on the pavement, and atmospheric data from precipitation, RH, and air temperature sensors is available: Water on the pavement at or below 0 C. Snowy or icy pavement at or below 0 C. Freezing point temperature of the water/ice-control-chemical solution present on the surface of the pavement sensor for selected ice-control-chemicals. Depth of the water/ice-control-chemical solution present on the surface of the pavement sensor up to a depth of 0.5 in. Percentage of ice particles present in the water/ice-control-chemical solution resident on the surface of the pavement sensor. After bid opening and prior to contract execution, the successful Contractor will supply actual field test documentation that substantiates pavement sensor performance. F. Active Pavement Sensor. After bid opening and prior to contract execution, the successful Contractor will supply actual field test documentation that substantiates pavement sensor performance. Provide an RWIS capable of collecting and displaying data from an array of 2 or 4 active pavement surface sensor heads at the roadway locations as shown in the project plans. Active sensors must be installed with epoxy sealer so the top is flush with the surrounding roadway or bridge deck surface. Active sensors must be installed within 2000 ft. cable distance from the RPU enclosure. The equipment supplier must be consulted and approve any installation distances exceeding 2000 ft. Optional Active sensors will be thermally active using a Peltier thermo-electric element to measure the freeze point temperature of solution on the road. The Peltier junction will cool and warm the surface liquid/moisture in a 30 second cycle (on average) controlled by the RPU. At the point when the liquid/moisture changes state from liquid to solid, the temperature of the cell shall be measured and reported as the freeze point to the RPU. The freeze point temperature displayed to the user should be based on an average of the data points collected from the 2 or 4 head sensor array. The sensor must electronically measure the freeze point of the solution on its surface regardless of the type of anti-icing chemical mixtures or concentrations present. Sensor dimensions shall be 1.57 in. in diameter and 1.57 in. in height. The housing will be constructed of copper, epoxy, brass, and stainless steel, and supplied with 82 ft. of attached

6 shielded cable. The sensor shall operate in a temperature range of -40 C to 60 C. Sensor freeze point temperature detection range will be -20 C to 0 C with an accuracy of ± 0.7 C. Sensor performance will not be degraded by weather conditions, traffic, or road contaminants. G. PTZ Color Video Camera. Provide and install the PTZ (pan-tilt-zoom) color video camera(s) at the RWIS tower locations as shown on the project plans and specifications. It will be mounted to the RWIS tower approximately 27 feet above ground level. Furnish a PTZ Color Video Camera capable of grabbing up to 8 preset color video still frame images approximately every 5-10 minutes for display by the RWIS server. It will be fixed mounted, and positioned to take up to 8 views of the roadway, bridge and pump house locations to view traffic and weather conditions. Provide a PTZ Color Video Camera enclosed in an environmental video dome housing to operate in 100% humidity, -40 C to 60 C operating temperature, and withstand common air contaminants found along roadway locations. The small video dome will provide dual mode, day (color) and night (monochrome) video camera with optical zoom lens and a high speed positioning system enclosed within a sealed and pressurized 7 in. optical dome. Furnish a PTZ Color Video Camera with a lens has a focal length of 23:1. It will include auto/manual focus with focus control and variable speed zoom. A digital zoom range of up to 10X providing an effective zoom ratio of 230:1, and an effective focal length of 3.6 mm to 828 mm on a 1/4 in. format Progressive Scan CCD camera, resulting in an effective horizontal angle of view of 54 wide angle to 2.5 max. Telephoto. Provide a PTZ Color Video camera that will provide Wide Dynamic Range (WDR) by use of dual shutter exposure technique. The pan function shall provide 360 of continuous rotation, with a variable speed from 0.5 per second to 225 per second. The tilt function will provide 180 of movement (0 to 90 down to 0, with video rotation), with a variable speed from 0.5 per second to 60 per second. Furnish a PTZ Color Video camera with 64 preset available for storing and recalling zoom, pan and tilt positions. The camera will be capable of tour sequence defined using up to 64 preset positions. All camera and pan & tilt functions are operable via RS-422/RS-232 serial communications by maintenance terminal on-site or connection to the RPU. H. Wireless Device Control. Provide an RWIS system that will also incorporate a wireless device control package. Upon the RPU detecting a low visibility condition, the system will provide a wireless dry contact relay closure at two LED signs. The LED signs shall have a preprogrammed message indicating low visibility to the traveling public. The LED signs will use 120 VAC commercial power for operation. Specifications for the Wireless Device Control package are listed in the below chart:

7 Wireless Device Control System Architecture Wireless Connection Performance Monitoring Operating Temperature Range Power Smart Radio Types Master Simple Relay Closure Slave Dual Flasher Slave One master smart radio communicating with two slave radios. 900 MHz unlicensed spread spectrum radios. Slaves report operational status to the master radio. If all slaves are operating correctly, the master closes a feedback relay to the RPU. The master maintains a log of reports from slaves. -40 C to 70 C (-40 F to 158 F) 12VDC (optional solar and/or battery) or 120VAC Sends ON/OFF commands. Closes feedback relay if all slaves work correctly. Maintains reporting log. When ON, the slave closes a relay. When OFF, the relay opens When ON, the slave flashes one lamp or two alternating lamps. When the slave is OFF, the lamps are off. Lamp currents are monitored when ON and when OFF to verify correct operation. I. RPU to Network Server Data Communications. Furnish an RWIS with communication that will adhere to TCP/IP network protocols. The RPU shall communicate with the NS via one CCITT V.24/EIA RS-232C communication interface port on the RPU coupled to a modem and dial-up communication. The NS will poll the RWIS and FAST system at an interval specified by the agency to transfer and refresh its data. The contractor will provide and install the phone line for the RWIS and a second phone line for the FAST system. The TxDOT will acquire and maintain a phone line service at the site and server location dedicated to the RWIS/FAST system. Provide and install the phone line for the RWIS and a second phone line for the FAST system. The TxDOT will acquire and maintain a phone line service at the site and server location dedicated to the RWIS/FAST system. J. Network Server (NS)/Scan WEB GUI Upgrade. Furnish a NS that will be a Windows 2000/2003 Operating System Server, which will collect sensor data from all RPUs in the system, then process and store the information in a Microsoft SQL Server Relational Database Management System. The Network Server will be an IBM-compatible Pentium-class Server having sufficient processing power and capacity to meet the following operational requirements. Collect all sensor data from a maximum of 10 RPUs in TXDOT Permit up to 10 users to access the RWIS data simultaneously Store historical data from the sensors for 1 winter season. The TXDOT will provide site licenses for the server operating software. Provide a NS that will serve the sensor data to users via a permanent network connection to the TXDOT LAN/WAN Furnish an RWIS Server application that will be 32-bit and employ Microsoft SQL Server Relational database to store RWIS data and allow multiple, simultaneous access to the database for updates from the RPUs together with simultaneous user interface access

8 Provide an NS and associated peripheral equipment that will operate from VAC and will be operated in an environmentally controlled and secured area. K. Network Web Page Displays. Provide a Server-based Internet Web Page Data Display Upgrade (IWPDD). The IWPDD (Scan 5.0) shall reside on the Network Server and provide access to RWIS data via the existing TXDOT LAN using a widely available "Internet Browser" (Internet Explorer). Furnish an IWPDD that will employ the Networking and Database capability of the Network Server with Microsoft's Internet Information Server (IIS), Active Server Pages (ASP), and Hyper Text Transfer Protocol (HTTP). IWPDD will provide access to timely data from the Network Server over a network or dial-up connection using the computer facilities which, in most cases, are already present on the users Windows based PC or laptop. Provide an IWPDD that will only require a Standard Browser (MS Internet Explorer or Netscape), a network or dial-up connection, and TCP/IP or PPP on the user's PC. All software, configuration, and administration shall be handled through the Network Server. Furnish and IWPDD with access and a display of current and historical RWIS sensor data, and forecast data resident on the Network Server from the Weather and Site Forecasting Service, will be available through the IWPDD in a text based format. Provide an IWPDD that will display any RPU site video images that are resident in the Network Server. The IWPDD will be capable of displaying NTCIP-ESS data. The various display pages are described in the following sections. This page must display a one-line summary of current data for each RPU in the system. This data includes (depending on RPU sensor configuration): RPU Name Representative Surface Sensor Name Data Collection Time for the RPU Surface Status for the RPU s representative surface sensor Surface Temperature, if available, for the RPU s representative surface sensor Subsurface Temperature, if available, for the RPU s representative subsurface probe Air Temperature Relative Humidity Dew point Temperature Precipitation Type Precipitation Intensity

9 Precipitation Rate Visibility Distance Wind Gust Speed Average Wind Direction Furnish a Summary Page that will use color to indicate the Surface Status and Precipitation Type. If left unattended, the Summary Page must refresh every 6 minutes. The Summary Page should link to the Surface Summary Page and each RPU s Status Page. The title of each data field must also be a link, which will display the Glossary definition for the field. There may be other links on this page depending on the availability of data such as maps, forecasts, cameras, etc. The Surface Summary Page should display current data for each surface sensor in the system grouped by RPU. This data includes (depending on the model of surface sensor): Surface Sensor Name and number Surface Status Surface Temperature Subsurface Temperature, if available, for the surface sensor Freeze Point Temperature Chemical Factor Chemical Percent Solution Depth Ice Percent In addition, the following RPU data items should be displayed for each group of surface sensors (depending on RPU sensor configuration): RPU Name Data Collection Time for the RPU Air Temperature Dew point Temperature Average Wind Speed Average Wind Direction Precipitation Type Provide a Surface Summary Page that uses color to indicate the Surface Status for each surface sensor. If left unattended, the Surface Summary Page must refresh every 6 minutes

10 The Surface Summary Page should link to the Summary Page, each RPU s Status Page, and each sensor s history page. The title of each data field must also be a link, which will display the Glossary definition for the field. There may be other links on this page depending on the availability of data such as maps, etc. L. RPU Status Page. The RPU Status Page should display all current data for a single RPU. This data includes (depending on RPU sensor configuration): RPU Name Data Collection Time Air Temperature Relative Humidity Dew point Temperature Average Wind Speed Wind Gust Speed Minimum Wind Direction Average Wind Direction Maximum Wind Direction Visibility Distance Precipitation Type Precipitation Intensity Precipitation Accumulation Precipitation Rate Water Level Surface Sensor Name Surface Status for each surface sensor Surface Temperature for each surface sensor Subsurface Temperature, if available, for the surface sensor Freeze Point Temperature Chemical Factor Chemical Percent

11 Solution Depth Ice Percent Provide an RPU Status page that will use color to indicate Surface Status and Precipitation Type. If left unattended, the RPU Status Page must refresh every 6 minutes. This RPU Status Page should link to the Summary Page and the History Page for the representative sensor. The title of each data field must also be a link, which will display the Glossary definition for the field. There may be other links on this page depending on the availability of data such as maps, forecasts, cameras, etc. M. History Page. Furnish a History Page that will display 8 hours of temperature, wind, and precipitation history data for a single RPU ordered most recent to least recent. The History Page must include (depending on RPU sensor configuration): RPU Name History Time Period Data Collection Time for each history data snapshot Surface Temperature for the RPU s representative surface sensor Subsurface Temperature, if available, for the RPU s representative surface sensor Air Temperature Relative Humidity Dew point Temperature Average Wind Speed Wind Gust Speed Average Wind Direction Precipitation Type Precipitation Intensity Provide a History Page that will use color to indicate the Precipitation Type. The History Page links to the Summary Page, the Surface Summary Page, the RPU Status Page, and the History Graph page. The History Page must include links to access the previous or next 8 hours of history data. Using these links, you should be able to navigate back through any history data available for an RPU. The title of each data field must also be a link, which will display the Glossary definition for the field. The data currently displayed on the History page must be linked to the data displayed on the Precipitation/Surface History Page

12 N. Surface History Page. Furnish a Surface History Page that will display 8 hours of surface status, surface temperature, and precipitation history data for a single RPU ordered most-recent to leastrecent. The Precipitation/Surface History Page includes (depending on RPU sensor configuration and surface sensor model): RPU Name History Time Period Data Collection Time for each history data snapshot Surface Status for the RPU s representative surface sensor Surface Temperature for the RPU s representative surface sensor Subsurface Temperature, if available, for the RPU s representative surface sensor Freeze Point Temperature for the RPU s representative surface sensor Chemical Factor for the RPU s representative surface sensor Chemical Percent for the RPU s representative surface sensor Solution Depth for the RPU s representative surface sensor Ice Percent for the RPU s representative surface sensor Precipitation Type Precipitation Intensity Precipitation Accumulation Precipitation Rate Provide a Surface History Page that will use color to indicate the Surface Status and Precipitation. The Surface History Page must link to the Summary Page, the RPU Status Page, the History page, and the History Graph page. The Surface History Page should include links to access the previous or next 8 hours of history data. Using these links, you should be able to navigate back through any history data available for an RPU. The title of each data field is also a link, which will display the Glossary definition for the field. O. History Graph Page. Furnish a History Graph page that will present a line graph representation of historical temperature data for a single RPU. The data displayed on the graph includes: Surface Temperature for each sensor Freeze Temperature for each sensor Air Temperature

13 Dew point Temperature The Options section at the bottom of the History graph should allow you to customize the display of data according to your needs. Each customization option should be available as described below. Chart Scale: Provide a chart scale withthe End Date and the Time Period determine the chart scale. Enter the date and time in dd mon yyyy hh:mm format. The date should be the end of the range of history data you are interested in viewing. When the graph is initially displayed, the current date and time is displayed in this field. The Time Period you select determines how many hours of data previous to the End Date are displayed in the graph. Chart Selections: Furnish Chart Selections that determine the lines, which are displayed on the graph. There are 4 types of lines that can be displayed. They are: Air Temp If selected, the Air temperature history line is displayed (default). Dew Temp If selected, the Dew point temperature history line is displayed. Surface Temp If selected, a surface temperature history line is displayed for each sensor that is selected (default). Freeze Temp If selected, a freeze temperature history line is displayed for each sensor that is selected. The name and number of each sensor for the current RPU is displayed along with a checkbox. Select the sensor or sensors you want displayed on the graph. When the graph is initially displayed, the representative sensor is selected as the default. Legends: This checkbox should allow you to determine whether the Precipitation Type & Intensity legend and the Surface Status legend are displayed. The box is checked by default. To remove the legends, uncheck the box. P. Glossary Page. Provide in addition to the RWIS data pages, a Glossary display page will be included which defines each of the data items displayed and other important terms. Every Web page must provide links to the Glossary Page to provide convenient access to on-line help. Q. Map Page. Provide a server that will provide all users with a map display page for displaying system data graphically. The map will display the RWIS and FAST system as well as all the sensors associated with the RPUs. Click on an RPU site noted on the map to display the current atmospheric data for the RPU. Click on a sensor site to display current data for the sensor. Sensors are color-coded based on its surface status. The map displays the RPU associated with a data tag. Only one data item can be displayed on a tag at any time. The same data item is displayed for each RPU on the map. By default, the air temperature is displayed. Data tag display can be configured to display RWIS data parameters as desired by the user. The default data item to be displayed on all maps during the current browser session can be configured on the Map Options page

14 R. Weather and Site Forecasting Service. Supply a 3 month introductory weather forecasting service to supplement system data collection and reporting functions for the RPU site. The forecasting service will include four regularly scheduled weather forecasts per day. The weather forecast will be site specific with a 24-hour projection of the following parameters: Pavement temperature Air temperature Precipitation start/stop time Precipitation type Snow accumulation Wind speed/direction Relative humidity Dew point Wind chill Provide a pavement temperature forecast model capable of forecasting pavement temperatures 24 hours into the future. The model must account for factors affecting the pavement temperature and must be based upon the scientific principle of heat balance at the specific RPU sites. The model shall also be able to account for the differences between elevated pavement, such as bridge decks and ground base pavement. Furnish the forecasts directly to the existing TxDOT RWIS server. TxDOT users will access the data via any PC with commercial web browser connected to the TxDOT statewide WAN. The vendor shall also provide a 24-hour a day toll free telephone service to the weather forecast service, staffed by meteorologists, for forecast clarification and general meteorological support. The vendor shall provide the forecasting service for the three month time period as directed by the TXDOT, during the first year of RPU operation. After the three month period the TXDOT will have an option to extend the service an additional three months to encompass the entire winter maintenance season. Materials for the LED Fog Raised Pavement Markers will consist of the following: Provide LED Fog Raised Pavement Markers Item I- marker 702 series Fog, or approved equal which contain electronics in the marker that monitor ambient light levels activation the LED s when the light drops below preset levels.. Furnish LED Fog Raised Pavement Markers that maintain an adequate charge for full duty cycle. The markers recharge by sunlight, lower level light, and from other light sources such as vehicle headlights. Provide LED Fog Raised Pavement Markers that are backed by a one year warranty (eighteen months on capacitor powered) and have a service life up to seven years. Furnish markers that use active photovoltaic LED technology

15 Provide markers that weigh 17 ounces. Furnish markers with a PVC coated aluminum alloy housing material. Provide markers with reflectors that are Corner cube, Polycarbonate lens with a colour of amber. Furnish markers with a normal operating temperature rang of 0 C to +70 C. Provide markers that are Bidirectional with 4 amber LED s built into the marker. The LED type will be 5000 mcd/led with an LED output frequency of steady. Furnish markers with visibility of 3,280 ft. with activation that is photo sensor. Provide markers that use NiMH or capacitor for electrical storage. The output on full charge will be 96 hours. Furnish markers with an operating temperature of -25 C to +75 C Provide markers that have a manufacturer s warranty of 1 year (battery) and 1.5 year (capacitor) Furnish markers that are tested ASTM Construction. Construction for the RWIS will be as follows: Install the RWIS in accordance with the RWIS vendor s recommendations, TxDOT plans and Standard specifications and all federal, state, and local codes and requirements. A. RWIS System Commissioning. Provide upon completion of the RWIS system equipment installation, the system vendor an on-site field engineer to start-up and test the entire system. This engineer will make all final sensor connections to the RPU; perform all final system checks, sensor alignments, software setup, and software configuration to provide a fully operational RWIS system. B. RWIS System Vendor. Furnish a detailed description (technical cut sheets) of the RWIS to be supplied by the Contractor and the experience of the vendor/manufacturer in supplying such RWIS to other like agencies. Provide written justification of the selection process used by the Contractor in the selection of a RWIS vendor/manufacturer. Such justification shall assure that TxDOT receives a state of the art RWIS from a responsible vendor/manufacturer that is compatible with the existing statewide RWIS system now in place. Prior to any award, DOT may require the Contractor to demonstrate the proposed RWIS can provide interoperability and connectivity to the existing statewide RWIS system. The RWIS equipment vendor chosen by the contractor must have at least 10 successful RWIS system installations in North America. As part of the equipment approval process, TxDOT may ask

16 the Contractor to provide the names of at least 10 agencies, with names, telephone numbers and contact person to verify said RWIS installations were successful. C. Warranty. Provide a limited, on-site warranty covering all equipment for a 12-month period from the RWIS commissioning date. The passive in-pavement sensors shall be covered by a parts only lifetime warranty. D. RWIS System Equipment Warranty. Furnish all RWIS system equipment for this project which will be state of the art and in current manufacture at the time of purchase. Provide an RWIS system from Surface Systems Inc., or approved equal. Construction for the LED Fog Raised Pavement markers will be as follows: Install all markers in accordance with the recommendations of the manufacturer, and in accordance with TxDOT standards. Markers will be installed as shown on the plans and as directed by the Engineer. Install all Fog Pavement markers using an epoxy provided by the marker manufacturer. Drill into the pavement surface a hole of approximately 2 3/8 deep and 1 1/8 wide. E. Training. When required on the plans, provide a minimum of 24 hr. of instruction to 10 designated personnel in the operation and maintenance procedures of equipment or systems installed. Provide the training during installation, testing, and integration. Provide the training through practical demonstrations, seminars, and other related technical procedures. Furnish a training session agenda, a complete set of training material (manuals and schematics), and the names and qualifications of proposed instructors for approval 60 days before the training. Provide a training location. Provide 1 copy of the course material for each person. Provide training in the following areas of interest and as shown on the plans: 1. The Hands-on operation for each type of equipment. 2. Explanation of all system commands, their function and usage. 3. Required preventative maintenance procedures. 4. All equipment servicing procedures. 5. System troubleshooting /problem identification procedures. 4. Measurement. This Item will be measured as lump sum for Detection System which consist of both the RWIS system and the LED Fog Raised Pavement Markers. 5. Payment. The work performed and the materials furnished in accordance with this Item and measured as provided under Measurement will be paid for at the unit price bid for Fog Detection System. This price is full compensation for furnishing, placing, testing all materials and equipment, and all tools, labor, drilling for markers, marker epoxy, equipment, supplies, and incidentals