# Roadway Treatment Goals

Metadata also available as

### Metadata:

- Identification_Information
- Spatial_Data_Organization_Information
- Spatial_Reference_Information
- Entity_and_Attribute_Information
- Distribution_Information
- Metadata_Reference_Information

Identification_Information:
Citation:
Citation_Information:
Title: Roadway Treatment Goals
Geospatial_Data_Presentation_Form: vector digital data
Description:
Abstract:
Due to the dynamic and diverse nature of winter weather and resultant road conditions, WSDOT maintenance personnel use a variety of methods and materials to help prevent snow and ice formation on state highways. Outcomes of snow and ice control treatments will vary, dependent upon severity of winter weather events, topography, traffic levels and speeds, and proximity to support facilities (i.e. liquid chemical storage tanks and salt stockpiles). While outcomes can be measured in a variety of ways, the motoring public most often measures maintenance efforts in terms of road conditions during and immediately after winter weather events. Maintenance personnel also rate roadway conditions during the winter season. This information is used to project expected road conditions associated with snow and ice treatment levels for different events. The unique nature of individual winter weather events limits the relevance of projected expectations on a given storm, but when ratings from an entire winter season are averaged, they become a good indicator of the Level of Service (LOS) provided by maintenance personnel over the entire season. Winter climates differ greatly between Eastern and Western Washington, so road treatment levels may vary on either side of the Cascades to match the ability to respond to those conditions. Limited funding also requires prioritization of roads for snow and ice control, so that different levels of service will be employed for individual roads and sections of roads
Purpose:
Roadway Treatment Goals establish recommended roadway treatment levels regardless of WSDOT Region or Maintenance Area boundary.
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -124.674937
East_Bounding_Coordinate: -116.861308
North_Bounding_Coordinate: 49.042695
South_Bounding_Coordinate: 45.504776
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: transportation
Theme_Keyword: Transportation
Theme_Keyword: environment
Theme_Keyword: Environment
Theme_Keyword: Maintenance Operations
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Categories
Theme_Keyword: transportation
Theme_Keyword: environment
Access_Constraints: None
Use_Constraints:
Data provided here is used by WSDOT's transportation partners, government entities, schools, private businesses, and the general public. The WSDOT GIS Community actively promotes inter agency data exchange and resource sharing.The Washington State Department of Transportation shall not be liable for any activity involving this data with regard to lost profits or savings or any other consequential damages; or the fitness for use of the data for a particular purpose; or the installation of the data, its use, or the results obtained.To download the most current version of this data, please visit the Washington State Department of Transportation's GeoData Distribution Catalog website:
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: WSDOT Maintenance
Contact_Person: Jim Anderson
Contact_Voice_Telephone: 360-705-7852
Contact_Electronic_Mail_Address: JAnders@wsdot.wa.gov
Data_Set_Credit: Washington State Department of Transportation
Native_Data_Set_Environment: Version 6.2 (Build 9200) ; Esri ArcGIS 10.9.1.28388
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 613
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: NAD 1983 HARN StatePlane Washington South FIPS 4602 Feet
Lambert_Conformal_Conic:
Standard_Parallel: 45.83333333333334
Standard_Parallel: 47.33333333333334
Longitude_of_Central_Meridian: -120.5
Latitude_of_Projection_Origin: 45.33333333333334
False_Easting: 1640416.666666667
False_Northing: 0.0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.00032808328978717327
Ordinate_Resolution: 0.00032808328978717327
Planar_Distance_Units: foot_us
Geodetic_Model:
Horizontal_Datum_Name: D North American 1983 HARN
Ellipsoid_Name: GRS 1980
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222101
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: TreatmentGoals
Attribute:
Attribute_Label: OBJECTID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: Shape.STLength()
Attribute_Definition: Line Length in feet
Attribute:
Attribute_Label: EndARM
Attribute_Definition:
The measure of a point at the end of a roadway segment along the length of a route in which the distance is measured as an accrual of mileage from the beginning of the route. The Accumulated Route Mile Begin may define the starting point for a business activity or measurement. For example, project location or roadside event.
Attribute_Definition_Source: WSDOT Application - DOTS
Attribute:
Attribute_Label: RouteID
Attribute_Definition:
A unique Route identifier to identify a route (City,County State, Tribal, Forest) in any given data set. For State Routes, Route IDs are assigned by WSDOT's GIS and Roadway Data Office
Attribute_Definition_Source: WSDOT Application - DOTS
Attribute:
Attribute_Label: TreatementGoal
Attribute_Definition:
No Value - Treatment Level 1-5 of the roadway is managed by a local agency.
Attribute_Definition_Source: WSDOT Snow and Ice Manual
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Treatment Level 1
Enumerated_Domain_Value_Definition:
Pre-event: Pre-treat roadway with anti-icing chemicals if conditions are appropriate for such treatment. Monitor the treatment for effectiveness and for the need to reapply. During event: Apply deicing chemicals to roadway during a snow event to keep snow and ice from accumulating and bonding to the pavement and to expedite the process of mechanical removal. If compact snow or black ice forms on the roadway, apply pre-wet solid chemicals to break the snow/ice bond and to assist the process of mechanical removal. Post-event: Continue snow and ice removal operations including chemical and mechanical methods until bare pavement is achieved.
Enumerated_Domain:
Enumerated_Domain_Value: Treatment Level 3
Enumerated_Domain_Value_Definition:
Pre-event: Maintain the same as higher priority roadways after those roadways have been treated and as resources allow. During event: Apply deicers on first passes when and where necessary to keep snow and ice from accumulating. Subsequent passes should rely primarily on plowing with the moderate use of pre-wet materials to assist mechanical snow and ice removal. Post event: Return pavement to bare and wet condition as soon as practical using plowing as the primary operation with moderate use of pre-wet materials to assist snow and ice removal.
Enumerated_Domain:
Enumerated_Domain_Value: Treatment Level 5
Enumerated_Domain_Value_Definition:
Pre-event: Maintain the same as higher priority roadways after those roadways have been treated and as resources allow. During event: Apply deicers on first passes when and where necessary to keep snow and ice from accumulating. Subsequent passes should rely primarily on plowing with the moderate use of pre-wet materials to assist mechanical snow and ice removal. Post event: Return to bare and wet as resources allow.
Enumerated_Domain:
Enumerated_Domain_Value: Treatment Level 4
Enumerated_Domain_Value_Definition:
Pre-event: Maintain the same as higher priority roadways after those roadways have been treated and as resources allow. During event: Apply deicers on first passes when and where necessary to keep snow and ice from accumulating. Subsequent passes should rely primarily on plowing with the moderate use of pre-wet materials to assist mechanical snow and ice removal. Post event: Return pavement to bare and wet condition as soon as practical using plowing as the primary operation with moderate use of pre-wet materials to assist snow and ice removal.
Enumerated_Domain:
Enumerated_Domain_Value: Treatment Level 2
Enumerated_Domain_Value_Definition:
Pre-event: Maintain the same as higher priority roadways after those roadways have been treated and as resources allow. During event: Apply deicing chemicals to roadway during a snow event to keep snow and ice from accumulating and bonding to the pavement and to expedite the process of mechanical removal. If compact snow or black ice forms on the roadway, apply pre-wet solid chemicals to break the snow/ice bond and to assist the process of mechanical removal. Post Event: Return pavement to bare and wet condition as soon as practical using plowing as the primary operation with moderate use of pre-wet materials to assist snow and ice removal.
Attribute:
Attribute_Label: EndSRMP
Attribute_Definition:
A logical number, assigned by a Linear Referencing Method, to the end of a roadway segment along a State Route. This value will always match the Accumulated Route Mileage value unless there has been a realignment or jurisdictional transfer which changes the length of a route.
Attribute_Definition_Source: WSDOT Application - DOTS
Attribute:
Attribute_Label: GlobalID
Attribute:
Attribute_Label: BegARM
Attribute_Definition:
The measure of a point at the beginning of a roadway segment along the length of a route in which the distance is measured as an accrual of mileage from the beginning of the route. The Accumulated Route Mile Begin may define the starting point for a business activity or measurement. For example, project location or roadside event.
Attribute_Definition_Source: WSDOT Application - DOTS
Attribute:
Attribute_Label: BegSRMP
Attribute_Definition:
A logical number, assigned by a Linear Referencing Method, to the end of a roadway segment along a State Route. This value will always match the Accumulated Route Mileage value unless there has been a realignment or jurisdictional transfer which changes the length of a route.
Attribute_Definition_Source: WSDOT Application - DOTS
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
Washington State Department of Transportation, Office of Information Technology
Contact_Person: Jordyn Mitchell
Contact_Position: GIS Database Administrator
Contact_Address:
Address_Type: mailing
Address: PO Box 47430
City: Olympia
State_or_Province: WA
Postal_Code: 98504-7430
Country: US
Contact_Voice_Telephone: 360-705-7645
Contact_Electronic_Mail_Address: mitchejo@wsdot.wa.gov
Distribution_Liability:
The Washington State Department of Transportation shall not be liable for any activity involving this data with regard to lost profits or savings or any other consequential damages; or the fitness for use of the data for a particular purpose; or the installation of the data, its use, or the results obtained.
Custom_Order_Process:
Download individual data sets from http://www.wsdot.wa.gov/mapsdata/geodatacatalog/default.htm
Metadata_Reference_Information:
Metadata_Date: 20251219
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: WSDOT Maintenance Operations
Contact_Person: Anastasiya Grecu
Contact_Position: GIS and Data System Manager
Contact_Electronic_Mail_Address: grecua@wsdot.wa.gov
Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time

Generated by mp version 2.9.50 on Fri Dec 19 13:00:15 2025