Name: Principal Arterial Roadways

Display Field: ROAD_NAME

Type: Feature Layer

Geometry Type: esriGeometryPolyline

Description: MDOT SHA Roadway National Highway System (NHS) data consists of linear geometric features which represent the geographic extent of roadways throughout the State of Maryland that are included in the National Highway System (NHS). MDOT SHA Roadway NHS data is includes information such as NHS Facility Description & Type, along with the government agency responsible for maintaining the roadway. MDOT SHA Roadway NHS data is primarily used for general planning purposes, and for Federal Highway Administration (FHWA) Highway Performance Monitoring System (HPMS) annual submission & coordination. The Maryland Department of Transportation State Highway Administration (MDOT SHA) currently reports this data only on the inventory direction (generally North or East) side of the roadway. MDOT SHA Roadway NHS data is not a complete representation of all roadway geometry.MDOT SHA Roadway NHS data is developed as part of the Highway Performance Monitoring System (HPMS) which maintains and reports transportation related information to the Federal Highway Administration (FHWA) on an annual basis. HPMS is maintained by the Maryland Department of Transportation State Highway Administration (MDOT SHA), under the Office of Planning and Preliminary Engineering (OPPE) Data Services Division (DSD). MDOT SHA Roadway NHS data is used by various business units throughout MDOT, as well as many other Federal, State and local government agencies. MDOT SHA Roadway NHS data is key to understanding which roadways are included within the NHS from the State of Maryland.MDOT SHA Roadway NHS data is updated & published on an annual basis for the prior year. This data is for the year 2019. View the most current MDOT SHA Roadway NHS data in the Maryland NHS Routes w/ Maintenance Responsibility ApplicationFor more information, contact MDOT SHA OIT Enterprise Information Services:Email: GIS@mdot.maryland.gov

Copyright Text: Maryland Department of Transportation (MDOT), Maryland Department of Transportation State Highway Administration (MDOT SHA), MDOT SHA Office of Planning & Preliminary Engineering (OPPE), MDOT SHA Data Services Division (DSD), MDOT SHA OIT Enterprise Information Services (GIS@mdot.maryland.gov)

Min. Scale: 0

Max. Scale: 0

Default Visibility: true

Max Record Count: 2000

Supported query Formats: JSON, geoJSON, PBF

Use Standardized Queries: True

Extent:

XMin: 595696.273684205
YMin: 121931.221236641
XMax: 1873546.67982303
YMax: 758425.647254834
Spatial Reference: 102685 (2248)

Drawing Info:

{"renderer":{"type":"simple","symbol":{"type":"esriSLS","style":"esriSLSSolid","color":[137,84,63,255],"width":1}},"scaleSymbols":true,"transparency":0,"labelingInfo":null}

HasZ: false

HasM: true

Has Attachments: false

Has Geometry Properties: true

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Object ID Field: FID

Unique ID Field:

Name : FID

IsSystemMaintained : True

Global ID Field:

Type ID Field:

Fields:

• FID (type: esriFieldTypeOID, alias: FID, SQL Type: sqlTypeOther, length: 0, nullable: false, editable: false)
• COUNTY (type: esriFieldTypeInteger, alias: COUNTY, SQL Type: sqlTypeOther, nullable: true, editable: true)
• COUNTY_NAM (type: esriFieldTypeString, alias: COUNTY_NAM, SQL Type: sqlTypeOther, length: 30, nullable: true, editable: true)
• ID_PREFIX_ (type: esriFieldTypeString, alias: ID_PREFIX_, SQL Type: sqlTypeOther, length: 50, nullable: true, editable: true)
• ID_PREFIX (type: esriFieldTypeString, alias: ID_PREFIX, SQL Type: sqlTypeOther, length: 2, nullable: true, editable: true)
• ID_RTE_NO (type: esriFieldTypeInteger, alias: ID_RTE_NO, SQL Type: sqlTypeOther, nullable: true, editable: true)
• MP_SUFFIX (type: esriFieldTypeString, alias: MP_SUFFIX, SQL Type: sqlTypeOther, length: 2, nullable: true, editable: true)
• ROAD_NAME (type: esriFieldTypeString, alias: ROAD_NAME, SQL Type: sqlTypeOther, length: 40, nullable: true, editable: true)
• ROUTEID_RH (type: esriFieldTypeString, alias: ROUTEID_RH, SQL Type: sqlTypeOther, length: 32, nullable: true, editable: true)
• FROM_MEASU (type: esriFieldTypeDouble, alias: FROM_MEASU, SQL Type: sqlTypeOther, nullable: true, editable: true)
• TO_MEASURE (type: esriFieldTypeDouble, alias: TO_MEASURE, SQL Type: sqlTypeOther, nullable: true, editable: true)
• NHS_CODE (type: esriFieldTypeString, alias: NHS_CODE, SQL Type: sqlTypeOther, length: 2, nullable: true, editable: true)
• NHS_DESCRI (type: esriFieldTypeString, alias: NHS_DESCRI, SQL Type: sqlTypeOther, length: 70, nullable: true, editable: true)
• NHS_FACILI (type: esriFieldTypeString, alias: NHS_FACILI, SQL Type: sqlTypeOther, length: 2, nullable: true, editable: true)
• MAINTENANC (type: esriFieldTypeString, alias: MAINTENANC, SQL Type: sqlTypeOther, length: 2, nullable: true, editable: true)
• MAINTENA_1 (type: esriFieldTypeString, alias: MAINTENA_1, SQL Type: sqlTypeOther, length: 70, nullable: true, editable: true)
• MUNICIPALI (type: esriFieldTypeString, alias: MUNICIPALI, SQL Type: sqlTypeOther, length: 50, nullable: true, editable: true)
• MUN_SORT (type: esriFieldTypeInteger, alias: MUN_SORT, SQL Type: sqlTypeOther, nullable: true, editable: true)
• GlobalID (type: esriFieldTypeString, alias: GlobalID, SQL Type: sqlTypeOther, length: 38, nullable: true, editable: true)
• Shape__Length (type: esriFieldTypeDouble, alias: Shape__Length, SQL Type: sqlTypeDouble, nullable: true, editable: false)

Templates:

Name: Principal Arterial Roadways
Description:
Drawing Tool: esriFeatureEditToolLine
Prototype:

Attributes:

Is Data Versioned: false

Has Contingent Values: false

Supports Rollback On Failure Parameter: true

Last Edit Date: 5/1/2026 6:17:10 PM

Schema Last Edit Date: 5/1/2026 6:17:10 PM

Data Last Edit Date: 5/1/2026 6:17:10 PM

Supported Operations:   Query   Query Pivot   Query Top Features   Query Analytic   Query Bins   Generate Renderer   Validate SQL   Get Estimates   ConvertFormat