Name: HPMS Off Highway (OH) Speed Limits

Display Field: RouteId

Type: Feature Layer

Geometry Type: esriGeometryPolyline

Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS Off-Highway (OH) speed limits event polyline feature class represents the legally posted regulatory speed limit for each roadway segment included in the HPMS inventory. This attribute indicates the maximum lawful vehicle speed under ideal driving conditions, as displayed on official roadside signs. Speed limit values are expressed in miles per hour (mph) and reflect the prevailing posted speed along each segment. When different speed limits apply to different directions or vehicle classes, the value recorded represents the primary posted limit for passenger vehicles in the predominant direction of travel. This dataset is used by engineers, planners, and safety analysts to evaluate roadway performance, design consistency, and risk exposure. It also supports federal reporting, crash rate normalization, and statewide transportation modeling. The speed limit data is maintained and updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) submittal to the Federal Highway Administration (FHWA). These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm

Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69

Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.

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

Has Labels: false

Can Modify Layer: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

XMin: 2260914.1712999996
YMin: 1209638.0160000008
XMax: 2714071.9902
YMax: 1906151.0240000002
Spatial Reference: 102605  (8826)  LatestVCSWkid(0)

Drawing Info:

Renderer:
Simple Renderer:
Symbol:
Style: esriSLSSolid
Color: [137, 112, 68, 255]
Width: 1
Label: N/A
Description: N/A
Transparency: 0
Labeling Info:

Advanced Query Capabilities:

Supports Statistics: true
Supports OrderBy: true
Supports Distinct: true
Supports Pagination: true
Supports TrueCurve: true
Supports Returning Query Extent: true
Supports Query With Distance: true
Supports Sql Expression: true
Supports Query With ResultType: false
Supports Returning Geometry Centroid: false
Supports Binning LOD: false
Supports Query With LOD Spatial Reference: false
Supports Percentile Statistics: true
Supports Having Clause: true
Supports Count Distinct: true
Supports Time Relation: true
Supports Sql Format: false
Supports Query Analytic: true
Supports Query With Current User: true

HasZ: true

HasM: true

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• RouteId ( type: esriFieldTypeString, alias: Route ID, length: 12 )
• FromDate ( type: esriFieldTypeDate, alias: From Date, length: 8 )
• ToDate ( type: esriFieldTypeDate, alias: To Date, length: 8 )
• EventId ( type: esriFieldTypeString, alias: Event ID, length: 38 )
• FromMeasure ( type: esriFieldTypeDouble, alias: From Measure )
• ToMeasure ( type: esriFieldTypeDouble, alias: To Measure )
• LocError ( type: esriFieldTypeString, alias: Location Error, length: 100 )
• SpeedLimit ( type: esriFieldTypeSmallInteger, alias: Speed Limit )
• SystemModifyDate ( type: esriFieldTypeDate, alias: System Modify Date, length: 8 )
• GlobalID ( type: esriFieldTypeGlobalID, alias: GlobalID, length: 38 )
• RouteSystemCode ( type: esriFieldTypeString, alias: Route System Code, length: 2 )
• RouteSystemNumber ( type: esriFieldTypeSmallInteger, alias: Route System Number )
• Shape ( type: esriFieldTypeGeometry, alias: Shape )
• Shape.STLength() ( type: esriFieldTypeDouble, alias: Shape.STLength() )

Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

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