Name: HPMS Grade

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 grade event polyline feature class represents the longitudinal slope, or steepness, of a roadway segment. Grade is a key geometric characteristic that influences vehicle performance, fuel consumption, drainage, and roadway safety. It is expressed as a percentage based on the rise or fall in elevation over a given horizontal distance. Grade information is derived from roadway centerline geometry, design plans, and digital elevation data maintained in ITD’s roadway inventory and HPMS systems. Both upgrade (positive) and downgrade (negative) values are recorded to indicate direction of slope relative to increasing route mile point. This dataset is used by engineers, planners, and safety analysts to evaluate roadway performance, assess design compliance, and identify locations where steep grades may affect vehicle operations or maintenance needs. Grade data is updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) reporting 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: 2254295.3529000003
YMin: 1199867.0130000003
XMax: 2743735.2621
YMax: 1980678.9562
Spatial Reference: 102605  (8826)  LatestVCSWkid(0)

Drawing Info:

Renderer:
Simple Renderer:
Symbol:
Style: esriSLSSolid
Color: [137, 205, 102, 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 )
• Grade ( type: esriFieldTypeDouble, alias: Grade )
• 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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