SCAN Glossary

Pavement Table Data Definitions
Data Type	Abbr.	Definition
Surface Status	Status	Condition of the pavement surface
Surface Temperature	Sfc	Temperature of the pavement surface.
Pavement Temperature	Pvt	Temperature of the pavement 2 to 10 cm below the pavement surface.
Subsurface Temperature	Sub	Typically, the temperature approximately 43 cm (17 inches) below the top of the pavement. You can place additional subsurface sensors at different depths to monitor frost depth.
Subsurface Moisture	Moisture	The sub-surface moisture expressed as a percentage (eg. 0 indicates dry, 100 indicates saturated). This value is only displayed for NTCIP sites configured with the appropriate sensor.
Delta Time	Delta T	Raw measurement from the Time Domain Reflectometry MP-917 Soil Moisture probe. This value is only displayed for NTCIP sites configured with the appropriate sensor.
Freeze Point	Frz	Freezing point of the moisture on the pavement sensor based upon the specific chemical in use. This field is reported when the surface status is Wet, Chemical Wet, or Snow/Ice Warning.
Chemical Percent	Chem	Percent of chemical saturation in the moisture. This field is reported when the surface status is Wet, Chemical Wet, or Snow/Ice Warning.
Ice Percentage	Ice	Percent of ice in the moisture. When ice percentage is roughly 50% to 85%, you would typically call the surface moisture "slush". This field is reported when the surface status is Wet, Chemical Wet, or Snow/Ice Warning.
Depth	Dpth	Depth of water layer on the sensor. This field is reported when the surface status is Wet, Chemical Wet, or Snow/Ice Warning and the surface temperature is above the freeze point temperature.
Water Depth / Ice Thickness	DpthThk	Depth of water or the thickness of ice or slush on the sensor. Provides a more precise value than Depth.
Chemical Factor	CF	Relative indication of chemical present in the moisture on the surface. Chemical factor uses a relative scale ranging from 0 to 100.
Conductivity	Cond	The conductance of the ice/liquid mixture on the pavement. This value is only displayed for NTCIP sites configured with the appropriate sensor.
Salinity	Salin	Salinity is roughly the number of grams of dissolved matter per kilogram of seawater. Units shown in parts per 100,000. This value is only displayed for NTCIP sites configured with the appropriate sensor.
Friction Index	FI	A value from 0 to 1 representing the deceleration capabilities of vehicles while taking into account current surface conditions. Larger values indicate a higher level of friction while smaller values represent a lower level of friction.

Pavement Table Data Definitions

Data Type

Abbr.

Definition

Surface Status

Status

Condition of the pavement surface

Surface Temperature

Sfc

Temperature of the pavement surface.

Pavement Temperature

Pvt

Temperature of the pavement 2 to 10 cm below the pavement surface.

Subsurface Temperature

Sub

Typically, the temperature approximately 43 cm (17 inches) below the top of the pavement. You can place additional subsurface sensors at different depths to monitor frost depth.

Subsurface Moisture

Moisture

The sub-surface moisture expressed as a percentage (eg. 0 indicates dry, 100 indicates saturated). This value is only displayed for NTCIP sites configured with the appropriate sensor.

Delta Time

Delta T

Raw measurement from the Time Domain Reflectometry MP-917 Soil Moisture probe. This value is only displayed for NTCIP sites configured with the appropriate sensor.

Freeze Point

Frz

Freezing point of the moisture on the pavement sensor based upon the specific chemical in use. This field is reported when the surface status is Wet, Chemical Wet, or Snow/Ice Warning.

Chemical Percent

Chem

Percent of chemical saturation in the moisture. This field is reported when the surface status is Wet, Chemical Wet, or Snow/Ice Warning.

Ice Percentage

Ice

Percent of ice in the moisture. When ice percentage is roughly 50% to 85%, you would typically call the surface moisture "slush". This field is reported when the surface status is Wet, Chemical Wet, or Snow/Ice Warning.

Depth

Dpth

Depth of water layer on the sensor. This field is reported when the surface status is Wet, Chemical Wet, or Snow/Ice Warning and the surface temperature is above the freeze point temperature.

Water Depth /
Ice Thickness

DpthThk

Depth of water or the thickness of ice or slush on the sensor. Provides a more precise value than Depth.

Chemical Factor

Relative indication of chemical present in the moisture on the surface. Chemical factor uses a relative scale ranging from 0 to 100.

Conductivity

Cond

The conductance of the ice/liquid mixture on the pavement. This value is only displayed for NTCIP sites configured with the appropriate sensor.

Salinity

Salin

Salinity is roughly the number of grams of dissolved matter per kilogram of seawater. Units shown in parts per 100,000. This value is only displayed for NTCIP sites configured with the appropriate sensor.

Friction Index

A value from 0 to 1 representing the deceleration capabilities of vehicles while taking into account current surface conditions. Larger values indicate a higher level of friction while smaller values represent a lower level of friction.

Surface Status Definitions
The following surface status codes are listed in order of severity with the most critical status listed first. Third party vendors may calculate surface conditions differently. Please contact your equipment vendor for details.
Status	Description
Snow/Ice Warning	Continuous film of ice and water mixture at or below freezing (32°F / 0°C) with insufficient chemical to keep the mixture from freezing. This status can only be reported at Vaisala ESP and SP sites when precipitation occurs.
Ice Warning	Continuous film of ice and water mixture at or below freezing (32°F / 0°C) with insufficient chemical to keep the mixture from freezing. This status can only be reported at NTCIP sites.
Snow Warning	This status can be reported at NTCIP sites, but will not be reported by Vaisala NTCIP sites.
Wet Below Freezing	Moisture on pavement sensor with a surface temperature below freezing (32°F / 0°C). This status will only be reported at Vaisala SCAN Detector sites.
Ice Watch	Thin or spotty film of moisture at or below freezing (32°F / 0°C). This status can only be reported at NTCIP sites when precipitation is not occurring.
Snow/Ice Watch	Thin or spotty film of moisture at or below freezing (32°F / 0°C). This status can only be reported at Vaisala ESP and SP sites when precipitation is not occurring.
Snow Watch	This status can be reported at NTCIP sites, but is not detected at Vaisala NTCIP sites.
Frost	Moisture on pavement at or below freezing (32°F / 0°C) with a pavement temperature at or below the dew point temperature. This status can only be reported by Vaisala ESP, SP, and NTCIP sites when precipitation is not occurring.
Chemical Wet	Continuous film of water and ice mixture at or below freezing (32°F or 0°C) with enough chemical to keep the mixture from freezing. This status can only be reported by Vaisala ESP, SP, and NTCIP sites when precipitation occurs.
Wet	Continuous film of moisture on the pavement sensor with a surface temperature above freezing (32°F or 0°C). This status can be reported by Vaisala ESP, SP, SCAN Detector, and NTCIP sites when precipitation has occurred.
Damp	Thin or spotty film of moisture above freezing (32°F or 0°C). This status can only be reported by Vaisala ESP, and SP sites when precipitation is not occurring.
Trace Moisture	Thin or spotty film of moisture above freezing (32°F or 0°C). Surface moisture occurred without precipitation being detected. This status will only be reported at NTCIP sites when precipitation is not occurring.
Absorption at Dew Point, Absorption, & Dew	These statuses can be reported at NTCIP sites, but are not currently detected at Vaisala NTCIP sites.
Dry	Absence of moisture on the surface sensor. This status can be reported by Vaisala ESP, SP, SCAN Dectector, and NTCIP sites.
Other	Other is the standard NTCIP ESS surface condition code to handle conditions not explicitly included in this table. This status will only be reported NTCIP by sensors installed at NTCIP ESS sites.
No Report	The surface sensor is not operating properly and requires maintenance. This status will only be reported by Vaisala ESP and SP sites.
Error	The surface sensor is not operating properly and requires maintenance. This status will only be reported by NTCIP sites.

Surface Status Definitions

The following surface status codes are listed in order of severity with the most critical status listed first. Third party vendors may calculate surface conditions differently. Please contact your equipment vendor for details.

Status

Description

Snow/Ice Warning

Continuous film of ice and water mixture at or below freezing (32°F / 0°C) with insufficient chemical to keep the mixture from freezing.
This status can only be reported at Vaisala ESP and SP sites when precipitation occurs.

Ice Warning

Continuous film of ice and water mixture at or below freezing (32°F / 0°C) with insufficient chemical to keep the mixture from freezing.
This status can only be reported at NTCIP sites.

Snow Warning

This status can be reported at NTCIP sites, but will not be reported by Vaisala NTCIP sites.

Wet Below Freezing

Moisture on pavement sensor with a surface temperature below freezing (32°F / 0°C).
This status will only be reported at Vaisala SCAN Detector sites.

Ice Watch

Thin or spotty film of moisture at or below freezing (32°F / 0°C).
This status can only be reported at NTCIP sites when precipitation is not occurring.

Snow/Ice Watch

Thin or spotty film of moisture at or below freezing (32°F / 0°C).
This status can only be reported at Vaisala ESP and SP sites when precipitation is not occurring.

Snow Watch

This status can be reported at NTCIP sites, but is not detected at Vaisala NTCIP sites.

Frost

Moisture on pavement at or below freezing (32°F / 0°C) with a pavement temperature at or below the dew point temperature.
This status can only be reported by Vaisala ESP, SP, and NTCIP sites when precipitation is not occurring.

Chemical Wet

Continuous film of water and ice mixture at or below freezing (32°F or 0°C) with enough chemical to keep the mixture from freezing.
This status can only be reported by Vaisala ESP, SP, and NTCIP sites when precipitation occurs.

Wet

Continuous film of moisture on the pavement sensor with a surface temperature above freezing (32°F or 0°C).
This status can be reported by Vaisala ESP, SP, SCAN Detector, and NTCIP sites when precipitation has occurred.

Damp

Thin or spotty film of moisture above freezing (32°F or 0°C).
This status can only be reported by Vaisala ESP, and SP sites when precipitation is not occurring.

Trace Moisture

Thin or spotty film of moisture above freezing (32°F or 0°C). Surface moisture occurred without precipitation being detected.
This status will only be reported at NTCIP sites when precipitation is not occurring.

Absorption at Dew Point, Absorption, & Dew

These statuses can be reported at NTCIP sites, but are not currently detected at Vaisala NTCIP sites.

Dry

Absence of moisture on the surface sensor.
This status can be reported by Vaisala ESP, SP, SCAN Dectector, and NTCIP sites.

Other

Other is the standard NTCIP ESS surface condition code to handle conditions not explicitly included in this table. This status will only be reported NTCIP by sensors installed at NTCIP ESS sites.

No Report

The surface sensor is not operating properly and requires maintenance.
This status will only be reported by Vaisala ESP and SP sites.

Error

The surface sensor is not operating properly and requires maintenance.
This status will only be reported by NTCIP sites.

Bridge Sprayer Data Definitions
The following Bridge Sprayer definitions only apply to NTCIP sites.
Data Type	Abbr.	Definition
Sprayer Status	Status	Status of the bridge sprayer control system.
Last Activation	Last Activation	Date and Time the RWIS requested the bridge sprayer to be activated.
Start Time	Start Time	Date and time the bridge sprayer began the chemical application cycle. Start Time will only be reported for bridge sprayers configured to provide sprayer feedback to the RWIS site.
End Time	End Time	Date and time the bridge sprayer completed the chemical application cycle. End Time will only be reported for bridge sprayers configured to provide sprayer feedback to the RWIS site.
Tank Level	Tank Level	The amount of deicing chemical remaining in the bridge sprayer holding tank. Tank Level is only reported by a bridge sprayer connected via a Bridge Sprayer Controller.
Tank Level Start	Start	The amount of deicing chemical present in the bridge sprayer holding tank at the start of a spray event. Only reported by a bridge sprayer connected via a Bridge Sprayer Controller.
Tank Level End	End	The amount of deicing chemical present in the bridge sprayer holding tank at the completion of a spray event. Only reported by a bridge sprayer connected via a Bridge Sprayer Controller.
Tank Level Amount	Amount	The amount of deicing chemical used during a spray event. Only reported by a bridge sprayer connected via a Bridge Sprayer Controller.
Line Pressure	Line Pressure	The line pressure reported by the bridge sprayer in pounds per square inch. Line Pressure is only reported by a bridge sprayer connected via a Bridge Sprayer Controller.
Average Line Pressure	Average	The average line pressure reported by the bridge sprayer during a spray event. Only reported by a bridge sprayer connected via a Bridge Sprayer Controller.
Low Line Pressure	Low	The lowest line pressure reported by the bridge sprayer during a spray event. Only reported by a bridge sprayer connected via a Bridge Sprayer Controller.
High Line Pressure	High	The highest line pressure reported by the bridge sprayer during a spray event. Only reported by a bridge sprayer connected via a Bridge Sprayer Controller.
Flow Since Last Event	Flow Since	The amount of chemical that has leaked (as reported by the flow sensor) since the completion of the last spray event. This counter will reset after each firing and when the sprayer or RPU is restarted. This value is only reported by a bridge sprayer connected via a Bridge Sprayer Controller.
Average Flow Rate	Average	The average chemical applied per minute by the bridge sprayer during a sprayer event. Only reported by a bridge sprayer connected via a Bridge Sprayer Controller.
Low Flow Rate	Low	The lowest flow rate reported by the bridge sprayer during a sprayer event. Only reported by a bridge sprayer connected via a Bridge Sprayer Controller.
High Flow Rate	High	The highest flow rate reported by the bridge sprayer during a sprayer event. Only reported by a bridge sprayer connected via a Bridge Sprayer Controller.
Requested by	Requested by	The user that manually requested a bridge sprayer configuration change.
User Activation	User Activation	The user that manually requested a bridge sprayer activation.
Request Date/Time	Request Date/Time	The date and time that a bridge sprayer configuration change was requested by a user.
Effective Date/Time	Effective Date/Time	The date and time that a user requested bridge sprayer configuration change was delivered to the RWIS site. An * will be displayed if the configuration was not delivered to the site.
Sprayer Mode	Mode	Bridge sprayers can be configured in one of three modes: Automatic, On Demand, and Disabled. Automatic mode also allows On Demand requests from the Bridge Sprayer Activation page.
Max Operating Temperature	Max Temperature	The upper bound of the operational surface temperature range that controls whether the bridge sprayer can be automatically activated.
Min Operating Temperature	Min Temperature	The lower bound of the operational surface temperature range that controls whether the bridge sprayer can be automatically activated.
Wind Speed Hold Off	Wind Speed Hold Off	The maximum wind speed under which the bridge sprayer is configured to automatically activate.
Freeze Temperature Offset	Freeze Temp Offset	Activate sprayer when the surface temperature is within this many degrees or is less than the freeze point. A negative value can be specified to delay the automatic activation of the sprayer.
Freeze Condition Hold Off	Freeze Hold Off	Number of minutes required to elapse before reactivating the sprayer due to a freeze condition.
Dew Point Offset	Dew Point Offset	Activate sprayer when the surface temperature is within this many degrees or is less than the dew point. A negative value can be specified to delay the automatic activation of the sprayer.
Frost Condition Hold Off	Frost Hold Off	Number of minutes required to elapse before reactivating the sprayer due to a frost condition.

Bridge Sprayer Data Definitions

The following Bridge Sprayer definitions only apply to NTCIP sites.

Data Type

Abbr.

Definition

Sprayer Status

Status

Status of the bridge sprayer control system.

Last Activation

Date and Time the RWIS requested the bridge sprayer to be activated.

Start Time

Date and time the bridge sprayer began the chemical application cycle. Start Time will only be reported for bridge sprayers configured to provide sprayer feedback to the RWIS site.

End Time

Date and time the bridge sprayer completed the chemical application cycle. End Time will only be reported for bridge sprayers configured to provide sprayer feedback to the RWIS site.

Tank Level

The amount of deicing chemical remaining in the bridge sprayer holding tank. Tank Level is only reported by a bridge sprayer connected via a Bridge Sprayer Controller.

Tank Level Start

Start

The amount of deicing chemical present in the bridge sprayer holding tank at the start of a spray event. Only reported by a bridge sprayer connected via a Bridge Sprayer Controller.

Tank Level End

End

The amount of deicing chemical present in the bridge sprayer holding tank at the completion of a spray event. Only reported by a bridge sprayer connected via a Bridge Sprayer Controller.

Tank Level Amount

Amount

The amount of deicing chemical used during a spray event. Only reported by a bridge sprayer connected via a Bridge Sprayer Controller.

Line Pressure

The line pressure reported by the bridge sprayer in pounds per square inch. Line Pressure is only reported by a bridge sprayer connected via a Bridge Sprayer Controller.

Average Line Pressure

Average

The average line pressure reported by the bridge sprayer during a spray event. Only reported by a bridge sprayer connected via a Bridge Sprayer Controller.

Low Line Pressure

Low

The lowest line pressure reported by the bridge sprayer during a spray event. Only reported by a bridge sprayer connected via a Bridge Sprayer Controller.

High Line Pressure

High

The highest line pressure reported by the bridge sprayer during a spray event. Only reported by a bridge sprayer connected via a Bridge Sprayer Controller.

Flow Since Last Event

Flow Since

The amount of chemical that has leaked (as reported by the flow sensor) since the completion of the last spray event. This counter will reset after each firing and when the sprayer or RPU is restarted. This value is only reported by a bridge sprayer connected via a Bridge Sprayer Controller.

Average Flow Rate

Average

The average chemical applied per minute by the bridge sprayer during a sprayer event. Only reported by a bridge sprayer connected via a Bridge Sprayer Controller.

Low Flow Rate

Low

The lowest flow rate reported by the bridge sprayer during a sprayer event. Only reported by a bridge sprayer connected via a Bridge Sprayer Controller.

High Flow Rate

High

The highest flow rate reported by the bridge sprayer during a sprayer event. Only reported by a bridge sprayer connected via a Bridge Sprayer Controller.

Requested by

The user that manually requested a bridge sprayer configuration change.

User Activation

The user that manually requested a bridge sprayer activation.

Request Date/Time

The date and time that a bridge sprayer configuration change was requested by a user.

Effective Date/Time

The date and time that a user requested bridge sprayer configuration change was delivered to the RWIS site. An * will be displayed if the configuration was not delivered to the site.

Sprayer Mode

Mode

Bridge sprayers can be configured in one of three modes: Automatic, On Demand, and Disabled. Automatic mode also allows On Demand requests from the Bridge Sprayer Activation page.

Max Operating Temperature

Max Temperature

The upper bound of the operational surface temperature range that controls whether the bridge sprayer can be automatically activated.

Min Operating Temperature

Min Temperature

The lower bound of the operational surface temperature range that controls whether the bridge sprayer can be automatically activated.

Wind Speed Hold Off

The maximum wind speed under which the bridge sprayer is configured to automatically activate.

Freeze Temperature Offset

Freeze Temp Offset

Activate sprayer when the surface temperature is within this many degrees or is less than the freeze point. A negative value can be specified to delay the automatic activation of the sprayer.

Freeze Condition Hold Off

Freeze Hold Off

Number of minutes required to elapse before reactivating the sprayer due to a freeze condition.

Dew Point Offset

Activate sprayer when the surface temperature is within this many degrees or is less than the dew point. A negative value can be specified to delay the automatic activation of the sprayer.

Frost Condition Hold Off

Frost Hold Off

Number of minutes required to elapse before reactivating the sprayer due to a frost condition.

Bridge Sprayer Status Definitions
The following bridge sprayer status codes are only supported for bridge sprayers installed at NTCIP sites.
Sprayer Status	Description
Spraying	Feedback status from the bridge sprayer indicates the sprayer is currently applying chemical. This status will be reported after each activation status listed below or if the sprayer has been activated from an external source. The sprayer must provide activation feedback to report this status.
Waiting for confirmation to spray	Before a request for sprayer activation occurs, the RPU must detect conditions that meet one of the automatic sprayer activation definitions for two consecutive sensor evaluation cycles. This status will be reported when the RPU initially detects the conditions. Once the conditions are confirmed, the RPU will request the sprayer is activated and the proper activation status will be displayed.
Spraying Completed	The bridge sprayer has completed a spraying cycle. This status will be reported upon completion of each sprayer activation. The sprayer must provide activation feedback to report this status.
Active due to manual user request	A user manually requested a sprayer activation. Manual requests can be initiated from the Bridge Sprayer Activation page or directly from maintenance mode at the site.
Active due to freeze point condition	The RPU initiated a sprayer activation because the surface temperature is within the user specified temperature range or is less than the freeze point temperature. A negative value can be specified to delay the automatic activation of the sprayer. This status will only occur when the user specified average wind speed threshold has not been exceeded, the current surface temperature falls within the user defined operating surface temperature range, and the user defined freeze point condition hold off time has expired.
Active due to frost condition	The RPU initiated a sprayer activation because the surface temperature is within the user specified temperature range or is less than the dew point. A negative value can be specified to delay the automatic activation of the sprayer. This status will only occur when the user specified average wind speed threshold has not been exceeded, the current surface temperature falls within the user defined operating surface temperature range, and the user defined frost condition hold off time has expired.
Active due to rain and wet surface conditions	The RPU initiated a sprayer activation because the surface temperature is within the user specified temperature range or is less than freezing and rain is occurring. Moisture must also be present on the pavement. A negative value can be specified to delay the automatic activation of the sprayer. This status will only occur when the user specified average wind speed threshold has not been exceeded, the current surface temperature falls within the user defined operating surface temperature range, the user defined precipitation condition hold off time has expired, and the automatic precipitation activation option has been enabled.
Active due to freezing rain condition	The RPU initiated a sprayer activation because the surface temperature is within the user specified temperature range or is less than freezing and freezing rain is occurring. Moisture must also be present on the pavement. A negative value can be specified to delay the automatic activation of the sprayer. This status will only occur when the user specified average wind speed threshold has not been exceeded, the current surface temperature falls within the user defined operating surface temperature range, the user defined precipitation condition hold off time has expired, and the automatic precipitation activation option has been enabled.
Active due to snow condition	The RPU initiated a sprayer activation because the surface temperature is within the user specified temperature range or is less than freezing and snow is occurring at a rate greater than .2"/hr (5mm/hr). A negative value can be specified to delay the automatic activation of the sprayer. This status will only occur when the user specified average wind speed threshold has not been exceeded, the current surface temperature falls within the user defined operating surface temperature range, the user defined precipitation condition hold off time has expired, and the automatic precipitation activation option has been enabled.
Inactive due to high surface temperature	The RPU will not initiate a sprayer activation because the current surface temperature is warmer than the user defined surface temperature operating range.
Inactive due to low surface temperature	The RPU will not initiate a sprayer activation because the current surface temperature is colder than the user defined surface temperature operating range.
Inactive due to high winds	The RPU will not initiate a sprayer activation because the average wind speed is exceeding the user defined maximum wind speed.
Inactive due to freeze point hold off time	The RPU will not initiate a sprayer activation because the user specified freeze condition hold off time has not yet expired.
Inactive due to frost hold off time	The RPU will not initiate a sprayer activation because the user specified frost condition hold off time has not yet expired.
Inactive - critical conditions not detected	The RPU will not initiate a sprayer activation because the user specified freeze and frost conditions are not being reported.
Sprayer currently disabled per user request	The bridge sprayer has been disabled and cannot be automatically activated or manually activated on-demand until the sprayer is enabled.
The sprayer was triggered by the RWIS; however, the sprayer did not respond.	An activation request was sent to the bridge sprayer; however, the bridge sprayer was not activated.

Bridge Sprayer Status Definitions

The following bridge sprayer status codes are only supported for bridge sprayers installed at NTCIP sites.

Sprayer Status

Description

Spraying

Feedback status from the bridge sprayer indicates the sprayer is currently applying chemical. This status will be reported after each activation status listed below or if the sprayer has been activated from an external source. The sprayer must provide activation feedback to report this status.

Waiting for confirmation to spray

Before a request for sprayer activation occurs, the RPU must detect conditions that meet one of the automatic sprayer activation definitions for two consecutive sensor evaluation cycles. This status will be reported when the RPU initially detects the conditions. Once the conditions are confirmed, the RPU will request the sprayer is activated and the proper activation status will be displayed.

Spraying Completed

The bridge sprayer has completed a spraying cycle. This status will be reported upon completion of each sprayer activation. The sprayer must provide activation feedback to report this status.

Active due to manual user request

A user manually requested a sprayer activation. Manual requests can be initiated from the Bridge Sprayer Activation page or directly from maintenance mode at the site.

Active due to freeze point condition

The RPU initiated a sprayer activation because the surface temperature is within the user specified temperature range or is less than the freeze point temperature. A negative value can be specified to delay the automatic activation of the sprayer. This status will only occur when the user specified average wind speed threshold has not been exceeded, the current surface temperature falls within the user defined operating surface temperature range, and the user defined freeze point condition hold off time has expired.

Active due to frost condition

The RPU initiated a sprayer activation because the surface temperature is within the user specified temperature range or is less than the dew point. A negative value can be specified to delay the automatic activation of the sprayer. This status will only occur when the user specified average wind speed threshold has not been exceeded, the current surface temperature falls within the user defined operating surface temperature range, and the user defined frost condition hold off time has expired.

Active due to rain and wet surface conditions

The RPU initiated a sprayer activation because the surface temperature is within the user specified temperature range or is less than freezing and rain is occurring. Moisture must also be present on the pavement. A negative value can be specified to delay the automatic activation of the sprayer. This status will only occur when the user specified average wind speed threshold has not been exceeded, the current surface temperature falls within the user defined operating surface temperature range, the user defined precipitation condition hold off time has expired, and the automatic precipitation activation option has been enabled.

Active due to freezing rain condition

The RPU initiated a sprayer activation because the surface temperature is within the user specified temperature range or is less than freezing and freezing rain is occurring. Moisture must also be present on the pavement. A negative value can be specified to delay the automatic activation of the sprayer. This status will only occur when the user specified average wind speed threshold has not been exceeded, the current surface temperature falls within the user defined operating surface temperature range, the user defined precipitation condition hold off time has expired, and the automatic precipitation activation option has been enabled.

Active due to snow condition

The RPU initiated a sprayer activation because the surface temperature is within the user specified temperature range or is less than freezing and snow is occurring at a rate greater than .2"/hr (5mm/hr). A negative value can be specified to delay the automatic activation of the sprayer. This status will only occur when the user specified average wind speed threshold has not been exceeded, the current surface temperature falls within the user defined operating surface temperature range, the user defined precipitation condition hold off time has expired, and the automatic precipitation activation option has been enabled.

Inactive due to high surface temperature

The RPU will not initiate a sprayer activation because the current surface temperature is warmer than the user defined surface temperature operating range.

Inactive due to low surface temperature

The RPU will not initiate a sprayer activation because the current surface temperature is colder than the user defined surface temperature operating range.

Inactive due to high winds

The RPU will not initiate a sprayer activation because the average wind speed is exceeding the user defined maximum wind speed.

Inactive due to freeze point hold off time

The RPU will not initiate a sprayer activation because the user specified freeze condition hold off time has not yet expired.

Inactive due to frost hold off time

The RPU will not initiate a sprayer activation because the user specified frost condition hold off time has not yet expired.

Inactive - critical conditions not detected

The RPU will not initiate a sprayer activation because the user specified freeze and frost conditions are not being reported.

Sprayer currently disabled per user request

The bridge sprayer has been disabled and cannot be automatically activated or manually activated on-demand until the sprayer is enabled.

The sprayer was triggered by the RWIS; however, the sprayer did not respond.

An activation request was sent to the bridge sprayer; however, the bridge sprayer was not activated.

Camera Configuration Definitions
Cameras supporting multiple camera positions are only supported for NTCIP sites.
Data Type	Abbr.	Definition
Request Date/Time	Request Date/Time	The date and time that a camera configuration change was requested by a user.
Requested by	Requested by	The user that manually requested a camera configuration change.
Effective Date/Time	Effective Date/Time	The date and time that a user requested camera configuration change was delivered to the RWIS site. An * will be displayed if the configuration was not delivered to the site.
Camera Positions	Camera Positions	List containing all of the enabled camera positions at an NTCIP site.

Camera Configuration Definitions

Cameras supporting multiple camera positions are only supported for NTCIP sites.

Data Type

Abbr.

Definition

Request Date/Time

The date and time that a camera configuration change was requested by a user.

Requested by

The user that manually requested a camera configuration change.

Effective Date/Time

The date and time that a user requested camera configuration change was delivered to the RWIS site. An * will be displayed if the configuration was not delivered to the site.

Camera Positions

List containing all of the enabled camera positions at an NTCIP site.

Device Data Definitions
Devices using basic relay control are not supported for NTCIP sites. Generic Devices are only supported for NTCIP site.
Data Type	Abbr.	Definition
Status	Status	Status displays whether a device using basic relay control is currently "On" or "Off".
Set By / Requested By	Set By	Identifies the source that last controlled the device. "RPU" will be shown when the RPU determined that the device's state should have been set.
Command	Command	Identifies any user initiated device command that was sent from a user application.
Mode	Mode	Mode identifies the control mode the site is using to control the generic device. Supported modes are "Automatic" and "Manual". "Other" will be reported during the site restart process. Mode is only supported on NTCIP sites.
Control State	Control State	Control State displays the current state the RPU is sending to the generic device. The states are configurable per site and are only supported on NTCIP sites.
Device Status	Device Status	Device Status displays whether the generic device is either "On" or "Off", experiencing an "Error" condition, or in a transitional "Pending" state. "Other" will be reported during the site restart process. These status codes are only available on NTCIP sites.
Request Date/Time	Request Date/Time	The date and time that a generic device mode or control state change was requested by a user.
Effective Date/Time	Effective Date/Time	The date and time that a user requested a generic device mode or control state change was delivered to the RWIS site. An * will be displayed if the request was not delivered to the site.
Last State Change	Last State Change	The date and time the Control State was last sent by the RPU to the generic device.
Last Status Change	Last Status Change	The date and time of the last change in Device Status.

Device Data Definitions

Devices using basic relay control are not supported for NTCIP sites.
Generic Devices are only supported for NTCIP site.

Data Type

Abbr.

Definition

Status

Status displays whether a device using basic relay control is currently "On" or "Off".

Set By / Requested By

Set By

Identifies the source that last controlled the device. "RPU" will be shown when the RPU determined that the device's state should have been set.

Command

Identifies any user initiated device command that was sent from a user application.

Mode

Mode identifies the control mode the site is using to control the generic device. Supported modes are "Automatic" and "Manual". "Other" will be reported during the site restart process. Mode is only supported on NTCIP sites.

Control State

Control State displays the current state the RPU is sending to the generic device. The states are configurable per site and are only supported on NTCIP sites.

Device Status

Device Status displays whether the generic device is either "On" or "Off", experiencing an "Error" condition, or in a transitional "Pending" state. "Other" will be reported during the site restart process. These status codes are only available on NTCIP sites.

Request Date/Time

The date and time that a generic device mode or control state change was requested by a user.

Effective Date/Time

The date and time that a user requested a generic device mode or control state change was delivered to the RWIS site. An * will be displayed if the request was not delivered to the site.

Last State Change

The date and time the Control State was last sent by the RPU to the generic device.

Last Status Change

The date and time of the last change in Device Status.

Traffic Data Definitions
Data Type	Abbr.	Definition
Mode	Mode	Describes the configuration of the traffic sensor. The EIS RTMS traffic sensor supports three modes: Side-fired, Forward-fired In, Forward-fired Out. A permanent count station only supports the In Lane mode. Side-fired is configured to shoot across traffic lanes and can be configured to monitor up to eight different traffic lanes. Forward-fired In is configured to monitor a single traffic lane where traffic is traveling toward the sensor. Forward-fired Out is configured to monitor a single traffic lane where traffic is traveling away from the sensor. In Lane is specifies the mode for permanent count stations.
Time Interval	TimInt	Identifies the length of a single collection interval for the sensor in seconds.
Forward Average Speed	FwdAvgSpd	The average vehicle speed as a vehicle traveled through all traffic zones. Forward Average Speed is only collected in a Forward-fired configuration.
Average Traffic Speed	TrfSpd	The average vehicle speed calculated as a vehicles travel though each traffic zone.
Total Volume	TotalVolume	Total number of vehicles that were detected passing through a traffic zone.
Normal Volume	NormVol	Number of normal length vehicles that were detected passing through a traffic zone. For EIS sensors configured for foreward fire, the normal volume shown will represent all vehicles passing through the traffic zone since long volume will not be reported.
Long Volume	LongVol	Number of large vehicles (such as eighteen wheel trucks) that were detected passing through a traffic zone. This value is only available in a side-fired configuration. A Side-fired configuration can only be configured to support Long Volume or Average Headway, but not both.
Unclassified Volume	Unclass	Number of vehicles that were detected passing through a traffic zone where the speed or length of the vehicle could not be determined.
Occupancy	Occup	Percentage of time that a traffic zone is occupied.
Average Headway	AvgHeadway	Time interval between vehicles. This value is only available in a side-fired configuration. A Side-fired configuration can only be configured to support Average Headway or Long Volume, but not both.
Battery Voltage	Battery	Reports the remaining battery voltage. This value is only available for a permanent count station.
Speed Count	Speed Bin Name	Counts the number of vehicles for each speed range. This value is only available for a permanent count station.
Classification Count	Classification Bin Name	Counts the number of vehicles for each classification range. This value is only available for a permanent count station.

Traffic Data Definitions

Data Type

Abbr.

Definition

Mode

Describes the configuration of the traffic sensor. The EIS RTMS traffic sensor supports three modes: Side-fired, Forward-fired In, Forward-fired Out. A permanent count station only supports the In Lane mode.

Side-fired is configured to shoot across traffic lanes and can be configured to monitor up to eight different traffic lanes.
Forward-fired In is configured to monitor a single traffic lane where traffic is traveling toward the sensor.
Forward-fired Out is configured to monitor a single traffic lane where traffic is traveling away from the sensor.
In Lane is specifies the mode for permanent count stations.

Time Interval

TimInt

Identifies the length of a single collection interval for the sensor in seconds.

Forward Average Speed

FwdAvgSpd

The average vehicle speed as a vehicle traveled through all traffic zones. Forward Average Speed is only collected in a Forward-fired configuration.

Average Traffic Speed

TrfSpd

The average vehicle speed calculated as a vehicles travel though each traffic zone.

Total Volume

TotalVolume

Total number of vehicles that were detected passing through a traffic zone.

Normal Volume

NormVol

Number of normal length vehicles that were detected passing through a traffic zone.
For EIS sensors configured for foreward fire, the normal volume shown will represent all vehicles passing through the traffic zone since long volume will not be reported.

Long Volume

LongVol

Number of large vehicles (such as eighteen wheel trucks) that were detected passing through a traffic zone. This value is only available in a side-fired configuration. A Side-fired configuration can only be configured to support Long Volume or Average Headway, but not both.

Unclassified Volume

Unclass

Number of vehicles that were detected passing through a traffic zone where the speed or length of the vehicle could not be determined.

Occupancy

Occup

Percentage of time that a traffic zone is occupied.

Average Headway

AvgHeadway

Time interval between vehicles. This value is only available in a side-fired configuration. A Side-fired configuration can only be configured to support Average Headway or Long Volume, but not both.

Battery Voltage

Battery

Reports the remaining battery voltage. This value is only available for a permanent count station.

Speed Count

Speed Bin Name

Counts the number of vehicles for each speed range. This value is only available for a permanent count station.

Classification Count

Classification Bin Name

Counts the number of vehicles for each classification range. This value is only available for a permanent count station.

A time standard which uses the local time of Greenwich, England known as Greenwich Mean Time. It is one of the time standards used in meteorology, and it is 4 hours ahead of EDT (5 hours ahead of EST) - 00:GMT is equal to 8 pm EDT (5 pm PDT), 12:GMT is 8 am EDT (5 am PDT). You might also see GMT listed as Z, Zulu time, or UTC, Universal Coordinated Time.

Contents:

Data Definitions:

Terms