{ "culture": "en-US", "name": "", "guid": "", "catalogPath": "", "snippet": "This dataset contains the Roads and Highways Road Network Linear Referencing System (LRS) HPMS base thickness event polyline feature class which provides base thickness measurements for Idaho\u2019s public roadway segments as reported through the Highway Performance Monitoring System (HPMS). The data supports pavement design, maintenance management, structural evaluation, and long-term transportation asset analysis across Idaho.", "description": "

The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS base thickness event polyline feature class represents the thickness of the lowest pavement layer, commonly referred to as the base course, beneath the surface layer of the roadway. This information is collected and maintained as part of the HPMS inventory to support structural design, performance modeling, and pavement condition assessment. <\/SPAN><\/P>

The base thickness attribute indicates the compacted depth of granular, stabilized, or treated material placed directly on the subgrade to provide load distribution and structural support. Thickness values are typically expressed in inches and derived from design plans, as built documentation, or pavement management system records. <\/SPAN><\/P>

This dataset is used by engineers, planners, and researchers for evaluating pavement structure adequacy, forecasting maintenance needs, and analyzing the relationship between pavement design and performance. 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 and design records. <\/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 thickness event polyline feature class which provides base thickness measurements for Idaho\u2019s public roadway segments as reported through the Highway Performance Monitoring System (HPMS). The data supports pavement design, maintenance management, structural evaluation, and long-term transportation asset analysis across Idaho.", "title": "Roads and Highways - HPMS Base Thickness", "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": "" }