HPMS Facility Type

The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS facility type event polyline feature class identifies the operational design of each roadway segment, specifying whether it carries one-way or two-way traffic, functions as a ramp or non-mainline connector, or represents a non-inventory direction. Facility type classification allows for consistent network modeling and analysis of roadway characteristics within the HPMS framework. Data is derived from roadway inventory records, design documentation, and traffic operations information maintained as part of ITD’s Highway Performance Monitoring System (HPMS) reporting process to the Federal Highway Administration (FHWA). This information ensures alignment between ITD’s internal roadway data systems and federal reporting standards. The dataset is used by engineers, planners, and analysts to evaluate traffic operations, verify roadway function within the network, and maintain consistency between state and federal roadway classifications. Facility type values are reviewed and updated annually to reflect the current roadway configuration. 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）的道路与公路路网线性参考系统（Linear Referencing System, LRS）下的高速公路性能监测系统（Highway Performance Monitoring System, HPMS）设施类型事件折线要素类，用于标识各道路路段的运营设计，明确其通行方向为单向或双向、属于匝道或非主线连接线，或是代表非库存方向。设施类型分类可在HPMS框架内实现道路特征的一致性路网建模与分析。 数据源自ITD维护的道路库存记录、设计文档及交通运营信息，这些内容是其向美国联邦公路管理局（Federal Highway Administration, FHWA）提交HPMS报告流程的组成部分。该信息可确保ITD内部道路数据系统与联邦报告标准保持对齐。 该数据集可供工程师、规划人员与分析师用于评估交通运营状况、核验路网内的道路功能，并维持州级与联邦道路分类标准的一致性。设施类型的取值每年都会经过审核与更新，以反映当前的道路配置情况。 此图层为从Roads and Highways系统导出的内容，仅包含LRS中的有效记录，即当前的“工作”记录。如需获取静态已发布数据，请访问以下网址存储的记录：https://www.fhwa.dot.gov/policyinformation/hpms.cfm 本内容项属于HPMS权威要素图层的子图层。元数据。