View In:   WSDOT ArcGIS Online map viewer

Name: Active Transportation Route Directness Index Route

Display Field: RDI_Identifier

Type: Feature Layer

Geometry Type: esriGeometryPolyline

Description: This feature class represents the routes that were used for the Route Directness Index calculation. These routes were generated by submitting the begin and end points of each RDI_Transect to the Esri routing service using the Walking Distance parameter. The service returns a route of the shortest pedestrian path between the two points. The search tolerance for the routing service was set to 400 feet, so that if there was no valid walking destination within 400 feet of the begin or end point, no route was calculated. The routing service is dependent on the Esri network data available when the service was accessed in January 2025. The Route Directness Index (RDI) is a ratio that compares the straight-line (crow-flies) distance from one point to another across a barrier to the actual distance imposed by the network of paths available to a traveler. RDI data is particularly relevant to pedestrian and/or bicyclist trips due to the extra time, physical energy, and exposure to weather that out of direction travel creates. A complete discussion of route directness, including potential applications to decision making, can be found in the Washington State Multimodal Permeability Pilot Report, August 2021 [https://wsdot.wa.gov/sites/default/files/2021-11/MultimodalPermeabilityPilotReport-Aug2021.pdf]. RDI can be analyzed at different scales. A high-level analysis of RDI can address questions that compare population centers across the state or consider whether the RDI values are generally similar within a given population center or tend to vary in different portions of a population center. High level data could be combined with other statewide data such as crash data, transit stops, level of traffic stress data, destination data, etc. to analyze potential correlations. High level RDI data is less useful for analyzing a particular crossing location or recommending solutions to address high RDI values. A more detailed analysis is likely required when questions involve corridor studies or project evaluations. Detailed location information can refer to key destinations and crossing locations that are not captured using higher level network maps.The lowest RDI is 1 because a trip between those points can be made directly along an existing roadway. The actual methodology analyzed hypothetical trips where the start and end points were about a quarter mile apart relative to a straight line. In such a situation, an RDI of 2 would mean the trip is twice the distance it might otherwise be, or about one-half mile. Although one-half mile is not particularly far, the RDI is independent of the actual distance. We might start further down the road and if the RDI remained a 2 our trip distance would be twice as long as it could have been. The RDI thus measures the real or perceived burden or travel cost incurred by a person walking or bicycling.

Copyright Text: Washington State Department of Transportation

Default Visibility: true

MaxRecordCount: 1000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0

Max Scale: 0

Supports Advanced Queries: true

Supports Statistics: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports ValidateSQL: true

Supports Calculate: true

Supports Datum Transformation: true

Extent:

XMin: -1.385718370278807E7
YMin: 5704436.473131169
XMax: -1.3009645366321396E7
YMax: 6279583.378469948
Spatial Reference: 102100  (3857)

Drawing Info:

Renderer:
Class Breaks Renderer:
Field: RDI
Min. Value: 0.84855185
ClassBreakInfos:
• Class Maximum Value: 2
  Label: 2.0 or less
  Description: N/A
  Symbol:
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  Color: [117, 107, 177, 255]
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• Class Maximum Value: 281.05931331
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Transparency: 0
Labeling Info:

Advanced Query Capabilities:

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Supports Sql Expression: true
Supports Query With ResultType: true
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Supports Query Analytic: true
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HasZ: false

HasM: true

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field:

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: ObjectID, editable: false, nullable: false, defaultValue: null, modelName: OBJECTID )
• RDI_Identifier ( type: esriFieldTypeInteger, alias: RDI_Identifier, editable: true, nullable: true, defaultValue: null, modelName: RDI_Identifier )
• Crow_Miles ( type: esriFieldTypeDouble, alias: Crow_Miles, editable: true, nullable: true, defaultValue: null, modelName: Crow_Miles )
• Route_Miles ( type: esriFieldTypeDouble, alias: Route_Miles, editable: true, nullable: true, defaultValue: null, modelName: Route_Miles )
• RDI ( type: esriFieldTypeDouble, alias: RDI, editable: true, nullable: true, defaultValue: null, modelName: RDI )
• Shape__Length ( type: esriFieldTypeDouble, alias: Shape.STLength(), editable: false, nullable: true, defaultValue: null, modelName: Shape.STLength(), required: true )

Templates:

• Name: 2.0 or less
  Description:
  Prototype:
  Route_Miles: null
  RDI: 1.4242759249999999
  RDI_Identifier: null
  Crow_Miles: null
  
  Drawing Tool: esriFeatureEditToolLine
• Name: Greater than 2.0
  Description:
  Prototype:
  Route_Miles: null
  RDI: 141.529656655
  RDI_Identifier: null
  Crow_Miles: null
  
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Supports Query With Historic Moment: false

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Child Resources:   Field Groups   Contingent Values

Supported Operations:   Query   Query Analytic   Validate SQL   Generate Renderer   Return Updates   Iteminfo   Thumbnail   Metadata   Update Metadata