HPMS Widening

The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS widening event polyline feature class describes the degree to which a roadway can be widened to accommodate additional lanes and identifies the presence of any constraints, such as natural, structural, or environmental obstacles. The widening potential attribute represents the estimated ability to widen the roadway on either side within the existing or potential right-of-way. The widening obstacle attribute identifies major limitations that could restrict or prevent widening, such as rivers, steep terrain, railroads, adjacent development, or environmental features. This dataset assists planners and engineers in evaluating corridor capacity expansion opportunities and in prioritizing projects for improvement. Data are reviewed and 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爱达荷州运输部（Idaho Transportation Department，ITD）道路与公路路网线性参考系统（Linear Referencing System，LRS）HPMS拓宽事件折线要素类，用于描述道路可拓宽以增设额外车道的程度，并识别各类约束因素的存在情况，例如自然、结构或环境障碍。其中，拓宽潜力属性代表在现有或潜在路权范围内，道路两侧开展拓宽作业的预估能力；拓宽障碍属性则标识了可能限制或阻碍拓宽的主要限制因素，包括河流、陡坡地形、铁路、邻近开发项目或环境特征。该数据集可协助规划人员与工程师评估通道扩容机遇，并对改善项目进行优先级排序。数据每年均会完成审核与更新，作为ITD向联邦公路管理局（Federal Highway Administration，FHWA）提交公路性能监测系统（Highway Performance Monitoring System，HPMS）相关材料的年度工作的一部分。本图层为《道路与公路》系统的导出产物，仅涵盖线性参考系统中的有效记录，均为当前可使用的“工作”记录。如需获取静态的正式发布数据，请查阅存储于以下网址的记录：https://www.fhwa.dot.gov/policyinformation/hpms.cfm。此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