{ "culture": "en-US", "name": "", "guid": "", "catalogPath": "", "snippet": "This dataset contains the Roads and Highways Road Network Linear Referencing System (LRS) HPMS thickness flexible event polyline feature class that identifies the total thickness of all asphalt and other flexible pavement layers above the base course for Idaho\u2019s public roadway segments as reported through the Highway Performance Monitoring System (HPMS). The data supports pavement design, structural evaluation, and performance modeling.", "description": "
The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS thickness flexible event polyline feature class represents the combined compacted thickness of all flexible pavement layers constructed with asphaltic or bituminous materials. For flexible pavement structures, this includes all bound layers between the pavement surface and the top of the base course. <\/SPAN><\/P> The dataset supports pavement performance analysis, rehabilitation planning, and structural modeling in HPMS and related asset-management systems. Data are reviewed and updated annually as part of ITD\u2019s Highway Performance Monitoring System (HPMS) submittal to the Federal Highway Administration (FHWA). <\/SPAN><\/P>