{ "culture": "en-US", "name": "", "guid": "", "catalogPath": "", "snippet": "This dataset contains the Roads and Highways Road Network Linear Referencing System (LRS) HPMS base type event polyline feature class which identifies the base type classifications for Idaho\u2019s public roadway segments as reported through the Highway Performance Monitoring System (HPMS). The data identifies the primary material type of the lowest pavement layer beneath the surface course, supporting pavement design, maintenance management, and structural performance evaluation across Idaho.", "description": "

The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS base type event polyline feature class represents the material composition of the base course layer located between the pavement surface and the subgrade. This information is collected and maintained as part of ITD\u2019s HPMS inventory to support structural design, performance modeling, and pavement management analysis. <\/SPAN><\/P>

The base type attribute describes the construction material used in the base layer, indicating whether it consists of untreated aggregate, stabilized material, asphaltic concrete, lean concrete, or fractured Portland Cement Concrete (PCC). These classifications help assess pavement strength, drainage, and performance characteristics. <\/SPAN><\/P>

This dataset is used by engineers, planners, and researchers to evaluate pavement structure adequacy, forecast maintenance needs, and analyze relationships between pavement material types and performance outcomes. It is updated annually as part of ITD\u2019s Highway Performance Monitoring System (HPMS) submittal process to the Federal Highway Administration (FHWA) and reflects current data available from pavement inventory systems, construction records, and design documentation. <\/SPAN><\/P>

These are current \"working\" records. For the static, published data, please see the records stored at: <\/SPAN>https://www.fhwa.dot.gov/policyinformation/hpms.cfm<\/SPAN><\/A><\/P><\/DIV><\/DIV><\/DIV>", "summary": "This dataset contains the Roads and Highways Road Network Linear Referencing System (LRS) HPMS base type event polyline feature class which identifies the base type classifications for Idaho\u2019s public roadway segments as reported through the Highway Performance Monitoring System (HPMS). The data identifies the primary material type of the lowest pavement layer beneath the surface course, supporting pavement design, maintenance management, and structural performance evaluation across Idaho.", "title": "Roads and Highways - HPMS Base Type", "tags": [ "Transportation", "Roads and Highways", "Linear Referencing System", "LRS", "Road Network", "Highway Performance Monitoring System", "HPMS" ], "type": "", "typeKeywords": [], "thumbnail": "", "url": "", "minScale": 20000000, "maxScale": 5000, "spatialReference": "", "accessInformation": "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.", "licenseInfo": "

Spatial Data Disclaimer - The Idaho Transportation Department (ITD) provides this geographic data any any associated metadata \"as is\" without warranty of any kind, including but not limited to its completeness, fitness for a particular use, or accuracy of its content, positional or otherwise. It is the sole responsibility of the user to determine the usability of the data for their purposes. In no event shall ITD have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind arising out of the use of or reliance on the geographic data or metadata. In providing this data or access to it, ITD assumes no obligation to assist the user in the use of such data or in the development, use, or maintenance or any applications applied to or associated with the data or metadata.<\/SPAN><\/P><\/DIV><\/DIV><\/DIV>", "portalUrl": "" }