View In:   ArcGIS Online Map Viewer

Name: Top5_Town_Intersection_Clusters_2016_2018_25M

Display Field: crashcount

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: The top locations where reported collisions occurred at intersections have been identified. The crash cluster analysis methodology for the top intersection clusters uses a fixed meter search distance of 25 meters (82 ft.) to merge crash clusters together. This analysis was based on crashes where a police officer specified one of the following junction types: Four way intersection, T-intersection, Y-intersection, five point or more. Furthermore, the methodology uses the Equivalent Property Damage Only (EPDO) weighting to rank the clusters. EPDO is based any type of injury crash (including fatal, incapacitating, non-incapacitating and possible) having a weighting of 21 compared to a property damage only crash (which has weighting of 1). The clustering analysis used crashes from the three year period from 2015-2017. The area encompassing the crash cluster may cover a larger area than just the intersection so it is critical to view these spatially.

Service Item Id: a031b70198644c089e6bb91bae77f367

Copyright Text: Massachusetts Department of Transportation Office of Planning

Default Visibility: true

MaxRecordCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0.0

Max Scale: 0.0

Supports Advanced Queries: true

Supports Statistics: true

Use Standardized Queries: true

Supports ValidateSQL: true

Supports Calculate: true

Extent:

XMin: 46546.0
YMin: 781436.0
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Spatial Reference: 26986  (26986)  LatestVCSWkid(0)

Drawing Info:

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Labeling Info:

Advanced Query Capabilities:

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Supports Sql Expression: true
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Supports Time Relation: false
Supports Sql Format: false
Supports Query Analytic: true
Supports Query With Current User: true

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field:

Fields:

• objectid ( nullable: false, editable: false, defaultValue: null, alias: OBJECTID, type: esriFieldTypeOID )
• crashcount ( nullable: true, editable: true, defaultValue: null, alias: CrashCount, type: esriFieldTypeInteger )
• groupcode ( nullable: true, editable: true, defaultValue: null, length: 50, alias: GroupCode, type: esriFieldTypeString )
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• num_o ( nullable: true, editable: true, defaultValue: null, alias: NUM_O, type: esriFieldTypeInteger )
• epdo ( nullable: true, editable: true, defaultValue: null, alias: EPDO, type: esriFieldTypeInteger )
• top_5_town ( nullable: true, editable: true, defaultValue: null, length: 254, alias: TOP_5_TOWN, type: esriFieldTypeString )
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Templates:

• Name: Top5_Town_Intersection_Clusters_2016_2018_25M
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Capabilities: Query

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Supports Rollback On Failure: true

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Child Resources:   Field Groups   Contingent Values

Supported Operations:   Query   Query Attachments   Query Analytic   Query Top Features   Query Bins   Append   Validate SQL   Generate Renderer   Return Updates   Metadata   Update Metadata