HPMS Year Last Improvement

The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS year last improvement event polyline feature class represents the calendar year when the latest roadway improvement, rehabilitation, or resurfacing activity was completed. Improvements include projects intended to extend pavement life, enhance structural capacity, or improve ride quality without full reconstruction. This dataset provides critical input for pavement deterioration modeling and lifecycle planning. It reflects the timing of the last substantive upgrade that improved the functional or structural performance of the roadway. Data are updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) submittal to the Federal Highway Administration (FHWA). This layer is an export from Roads and Highways that represents only the active records within the LRS. These are current “working” records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm This content item is a sub-layer of the Highway Performance Monitoring System (HPMS) authoritative feature layer. Metadata爱达荷州交通部（Idaho Transportation Department, ITD）道路与公路路网线性参考系统（Linear Referencing System, LRS）下的公路性能监测系统（Highway Performance Monitoring System, HPMS）年度最新改善事件折线要素类，用于表征道路最新改善、修复或重铺作业的完成日历年。本类涵盖的改善项目包括旨在延长路面使用寿命、提升结构承载能力或改善行驶平顺性，但无需进行全面重建的工程。该数据集为路面劣化建模与全生命周期规划提供关键输入数据，同时反映了可提升道路功能或结构性能的最后一次实质性升级的时间节点。作为爱达荷州交通部向联邦公路管理局（Federal Highway Administration, FHWA）提交公路性能监测系统相关材料的工作内容之一，该数据集每年更新一次。此图层为《道路与公路》系统的导出产物，仅包含线性参考系统中的活跃记录，即当前的“工作中”有效记录。如需获取静态的已发布数据，请参阅存储于以下网址的记录：https://www.fhwa.dot.gov/policyinformation/hpms.cfm本内容项为公路性能监测系统（HPMS）权威要素图层的子图层。元数据