694Weather Monitoring and Reporting System

694.1General Description

Furnish, install, test, and provide warranty and training for a weather monitoring and reporting system comprised of equipment and materials as specified herein and shown in the Contract documents. 694.1.01 Definitions, Acronyms, and Abbreviations

or pole and/or installed on the surface.

issues.

Refer to Sections 101.01 and 942.1.01.B for a list of acronyms, abbreviations, and terminology used in this section. 694.1.02 Related References

694.1.03 Submittals Refer to Section 942.1.04 for submittal requirements. Requirements for ESS equipment, components, and materials are specified herein.

694.2Materials

694.2.01 Weather Monitoring and Reporting System Requirements

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manufacturer, using the same model, part number, revision, and firmware for each type of sensor as shown and specified in the Contract documents.

connectivity with the existing statewide ESS system and GDOT Central Software.

subsurface data:

pole and/or installed on the surface): i. Air temperature data ii. Relative humidity data iii. Ultrasonic Wind data iv. Barometric pressure data

vi. Visibility data

ii. Surface condition data

the Department).

with the ESS manufacturer requirements.

the Contract documents.

requirements defined in this section.

sensor to the RPU.

Table 1.

i. Provide a sensor that measures air temperature using a resistive sensor. ii. Provide a sensor that measures relative humidity using a capacitive sensor. 1326 1326 1326 1326 1326

ii. Provide a sensor that sends wind data to the RPU, including average wind speed, average wind direction, and peak gust and gust wind direction, determined over a 10 to 60-minute time interval as defined by the user, unless otherwise specified in the Contract documents.

ii. Provide a sensor that can be calibrated for different altitudes.

ii. Provide a sensor that detects visible precipitation in liquid and frozen form. iii. Provide a sensor that provides a yes/no indicator until a classification has been determined. iv. Provide a sensor that adds a classification for the following types of precipitation:

ii. Provide a sensor with transmitter hood and the capability to minimize dew build-up on the window of the sensor. iii. Provide a sensor that minimizes the amount and effects of dirt contamination and ice formation on the sensor window. iv. Provide a sensor that uses the forward scatter principle for the determination of optical visibility in the range designated in Table 1. 1327 1327 1327 1327 1327

TABLE 1 – ATMOSPHERIC SENSOR PERFORMANCE REQUIREMENTS Sensor Sensor Measurement Requirement Accuracy Range Operating Range Air Temperature and Humidity Air Temperature ±0.5°F (±0.3°C) -40°F to 140°F (-40°C to 60°C) Relative Humidity (RH) ±3% (0% to 90% RH) ±5% (90% to 100% RH) 0 to 100% Ultrasonic Wind Wind Speed ±3% from 0 to 77 mph (0 to 124 kph) ±5% from 78 to 120 mph (125 to 193 kph) 0 to 120 mph (0 to 193 kph) Resolution: 0.03 mph Wind Direction ±3 degrees at speed >0.45 mph (>0.72 kph) 0 to 360 degrees Resolution: 0.1 degrees Barometric Pressure Barometric Pressure ±1.0 millibar (±0.03 inch of mercury [inHg]) 800 to 1,080 millibars (23.6 to 31.9 inHg) Precipitation Precipitation Type Yes/No (90% reproducibility), light rain, rain, and ice N/A Precipitation Rate ±0.02 in/hour (±0.5 mm/hour) 0 to 8 in/hour (0 to 20 cm/hour) Precipitation Accumulation ±0.02 in (±0.5 mm) 0 to 8 in (0 to 20 cm) Visibility Visibility ±10% at 100 ft (30 m) to 1-mile (1.6 km) range ±15% at 1-mile (1.6 km) to 10 miles (16 km) range 100 ft to 52,800 ft (30 m to 16,000 m)

minimum performance requirements identified below and in Table 2.

three-minute intervals.

ii. Damp – Trace pavement moisture above freezing (no precipitation). iii. Wet – Precipitation has occurred and there is a continuous layer of water or moisture on the pavement. iv. Ice – Detection of ice layer formation on the pavement.

in Table 2.

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TABLE 2 – PAVEMENT CONDITION SENSOR PERFORMANCE REQUIREMENTS Sensor Sensor Measurement Requirement Accuracy Range Operating Range Surface Temperature Surface Temperature ±0.5°F (±0.3°C) −40°F to 140°F (−40°C to 60°C) Resolution: 0.1°F (0.06°C) Surface Status Dry N/A Damp Wet Ice Snow Surface Condition Ice Layer ±0.004 in (±0.1 mm) 0 to 0.06 in (0 to 2 mm) Water Layer ±0.004 in (±0.1 mm) 0 to 0.06 in (0 to 2 mm) Grip Level N/A 0.01 to 1

Table 3.

otherwise indicated in the Contract documents. TABLE 3 – SUBSURFACE SENSOR PERFORMANCE REQUIREMENTS Sensor Sensor Measurement Requirement Accuracy Range Operating Range Subsurface Temperature Subsurface Temperature ±0.4°F (±0.22°C) -40°F to 140°F (-40°C to 60°C) Resolution: 0.1°F (0.06°C)

additional sensors.

software enters an indeterminate state by itself or by a user administrator.

surge protection.

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parameter sensed by the ESS sensor.

last precipitation, forecasted snow or rain accumulation (equal to previous time interval), and probability of precipitation.

water and ice, percent of ice, snow/ice warning, snow/ice watch, wet below freezing, and frost condition.

and average grip level.

to display temperature data incrementally by depth of reading.

period of three calendar days and provides user-selectable interval of archived observations between 1 and 20 minutes.

troubleshooting, sensor configuration, and routine maintenance.

to be on-site.

Table 4.

special calibration.

the road.

temperature, and humidity in real time.

wet, ice), provides the thickness of any water or ice detected on the pavement, and calculates the friction of

the pavement.

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wireless connectivity for transport of ESS data to the TMC as specified in the Contract documents.

Department’s current cellular telecommunication service provider. Refer to Section 926.2.01.F for broadband

cellular router requirements.

ESSs available to the National Weather Service for use by the Meteorological Assimilation Data Ingest System

or successor program software. The data shall be pushed at regular intervals from a central ESS server to a

known site, such as a hosted FTP server. RPU communication with the hosted server shall utilize NTCIP-ESS

protocol. The RPU shall allow the server to poll the RPU via Ethernet communications. The data shall be

formatted in a common data format (e.g., .csv or .xml) for exporting into other system(s).

serial number.

aluminum, brass, or gold-plated metal.

<5/8 in. (15.8 mm) in diameter, that are made of Type 304 or 316, stainless steel meeting the requirements

of ASTM F593 and ASTM F594.

ASTM F3125.

operating voltages <120 VAC.

system meeting the minimum solar power system requirements specified in Section 939.2.08.

DC connector outlet. 13311331133113311331

Provide system components that are compatible with the field cabinet as shown in the Contract documents. The

field cabinet is not included in the pay items defined in Section 694.5.

new Department support structure or pole unless otherwise specified in the Contract documents.

components.

TABLE 4 – MOBILE ESS SENSOR PERFORMANCE REQUIREMENTS

Sensor Sensor

Measurement

Requirement

Accuracy Range Operating Range Frequency of

Reading

Air Temperature and

Relative Humidity

Air Temperature ±0.5°F

(±0.3°C)

-22°F to 122°F

(-30°C to 50°C)

10 times per second

Relative Humidity

(RH)

±3% (0% to 90% RH)

±5% (90% to 100% RH)

0 to 100%

Surface Temperature Surface

Temperature

±1.1°F

(±0.6°C)

Surface Status Dry N/A N/A 10 times per second

Wet

Damp or Moist

Frost

Snow and Ice

Surface Condition Ice Layer ±0.1 mm (up to 1.0 mm)

±0.004 in

0 to 0.06 in

(0 to 2 mm)

Water Layer ±0.1 mm (up to 1.0 mm)

±0.004 in

0 to 0.06 in

(0 to 2 mm)

Grip Level N/A 0.01 to 1

and humidity levels:

inside the vehicle

shock testing requirements.

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694.3Construction

The construction and installation of the ESS equipment, materials, components, and assemblies as specified

herein shall meet the requirements in this section and the ESS manufacturers’ installation requirements

and recommendations.

694.3.01 Construction Requirements

to providing interoperability and connectivity with the existing statewide ESS system.

Contract documents and per ESS manufacturer recommendations.

required by the Contract documents.

otherwise stated in the Contract documents.

ESS cabinet-top height, approximately 10 ft. (3 m) above pavement surface grade.

the top, install the anemometers at a minimum height of 16 ft. (4.9 m) above pavement surface grade.

the lanes.

include a sensor mounting bracket, pipe, and all associated hardware and materials.

conductors wired to terminal blocks in the ESS field cabinet.

power and control and return conductors along with site equipment, and in compliance with the ESS

manufacturer’s recommendations.

specified in the Contract documents.

installed equipment. 13331333133313331333

to the issuance of the MAL by the Department at which time the service provider account shall be

transferred to the Department.

weathertight and moisture seal.

to roadway edge of pavement).

between sensor and ESS field cabinet, so that ESSs are protected from lightning-induced surges.

conductors inside the ESS field cabinet.

the MAL at which time the Contractor shall arrange and schedule for the transfer of service to the Department.

the ESS manufacturer, if applicable:

fully operational ESS.

host server.

694.3.02 Equipment Configuration and Integration Requirements

Refer to Section 942.3.03 for ESS RPU and component configuration and integration requirements.

694.3.03 Testing Requirements

Refer to Section 942.3.04 for testing requirements.

694.3.04 Training Requirements

Refer to Section 942.3.05 for training requirements. 13341334133413341334

694.3.05 Warranty and Maintenance Support Services

warranties for the components are for a longer period, those longer period warranties shall apply.

Refer to Section 942.3.02 for maintenance support services requirements.

694.4Measurement

The ESS and training that are complete, in place, accepted, and of the kind, size, and type specified will be measured

as follows:

The Type 1 ESS will be measured for payment by the number installed, completed, functional, and accepted.

Unless otherwise specified in the Contract documents, furnish, install, test, and provide warranty for the following

minimum items as part of an ESS stationary system: atmospheric sensors, pavement condition sensors, and

ancillary equipment or incidental items, including wiring and cabling, mounting hardware, power supplies,

grounding, surge protection devices, and power connections, and power service to make a complete and fully

operational ESS.

Same as ESS Type 1 except with solar power system.

The Type 3 ESS will be measured for payment by the number installed within vehicles, completed, functional, and

accepted. Unless otherwise specified in the Contract documents, furnish, install, test, and provide warranty for the

following minimum items as part of an ESS mobile system: atmospheric sensors, surface condition sensors,

interface unit and processor, and ancillary equipment or incidental items, including wiring and cabling, mounting

hardware, and power supplies, to make a complete and fully operational mobile ESS.

The ESS sensors including 1) pavement sensor, non-invasive: 2) atmospheric sensor, visibility: 3) atmospheric

sensor, air temperature and relative humidity: 4) atmospheric sensor, ultrasonic wind: 5) atmospheric sensor,

barometric pressure: 6) atmospheric sensor, precipitation: and 7) subsoil sensor will be measured for payment by

the number installed, completed, functional, tested, and accepted. Unless otherwise specified in the Contract

documents, furnish, install, and provide warranty for ESS sensors and ancillary equipment or incidental items,

including wiring and cabling, and mounting hardware, to make a complete and fully operational mobile ESS.

The RPU will be measured for payment by the number installed, completed, functional, tested, and accepted.

Unless otherwise specified in the Contract documents, furnish, install, and provide warranty for RPU and ancillary

equipment or incidental items, including wiring and cabling, and rack mounting hardware, to make a complete and

fully operational RPU.

Training will be measured as a lump sum for supplies, equipment, materials, handouts, travel, and subsistence

necessary to conduct the training. 13351335133513351335

694.5Payment

694.5.01 Weather Monitoring and Reporting System

ESSs of the types specified in the Contract documents will be paid for at the Contract unit price. This price will include

full compensation for labor, materials, equipment, tools, test equipment, incidentals, installation, testing, and providing

warranty, necessary to complete the weather monitoring and reporting system.

Payment Notes:

Submittal

Submittal requirements are included in Section 942.1.04 and will not be paid for separately. It will be considered

incidental to the ESS pay item.

Testing

Testing is defined in Section 942.3.04 and will not be paid for separately. It will be considered incidental to the

ESS pay item.

ESS Field Cabinets

New ESS field cabinets will be paid for separately under Section 939.5 pay items.

ESS Support Structure

ESS support structure including poles and towers will be paid for separately under Section 639.5 pay items.

GDOT Central Software Integration

GDOT Central Software integration is included in Section 942.3.03 and will be paid for under the Section 942.5

pay item.

Broadband Wireless Routers

Broadband wireless routers will be paid for separately under the Section 926 pay item.

Payment for the weather monitoring and reporting system will be made under:

Item No. 694 ESS, Type ___ Per each

Item No. 694 Pavement Sensor, Non-invasive Per each

Item No. 694 Atmospheric Sensor, Visibility Per each

Item No. 694 Atmospheric Sensor, Air Temperature and Relative Humidity Per each

Item No. 694 Atmospheric Sensor, Ultrasonic Wind Per each

Item No. 694 Atmospheric Sensor, Barometric Pressure Per each

Item No. 694 Atmospheric Sensor, Precipitation Per each

Item No. 694 Subsoil Sensor Per each

Item No. 694 Remote Processing Unit Per each

694.5.02 Training

Payment for training will be made under:

Item No. 694 Training Lump Sum