HPMS Curves

The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS curves event polyline feature class identifies and describes the curved sections of roadways across the state. Each record shows where a curve begins and ends, how long it is, how tight the turn is, and whether it bends to the left or right. Understanding roadway curves helps engineers and planners design safer roads, evaluate crash risks, and plan improvements. The information is maintained and updated as part of ITD’s annual Highway Performance Monitoring System (HPMS) submission to the Federal Highway Administration (FHWA). The dataset reflects current roadway geometry information from Idaho’s statewide mapping and inventory systems. 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爱达荷州交通运输部（Idaho Transportation Department, ITD）的道路与高速公路路网线性参照系统（Linear Referencing System, LRS）下的公路性能监测系统（Highway Performance Monitoring System, HPMS）曲线事件折线要素类，用于识别并描述全州范围内道路的弯道区段。每条记录均记录了弯道的起止位置、长度、转弯曲率大小，以及弯道向左或向右的偏转方向。了解道路弯道信息，可帮助工程师与规划人员设计更安全的道路、评估碰撞风险，并规划道路改进方案。该信息作为ITD向美国联邦公路管理局（Federal Highway Administration, FHWA）提交的年度公路性能监测系统（Highway Performance Monitoring System, HPMS）报告的组成部分进行维护与更新。本数据集采用爱达荷州全州测绘与库存系统中的最新道路几何信息。该图层是从道路与高速公路系统导出的产物，仅包含线性参照系统（LRS）中的有效记录，均为当前可用的“工作”记录。如需获取静态发布数据，请访问以下链接查看已存储的记录：https://www.fhwa.dot.gov/policyinformation/hpms.cfm 本内容项属于公路性能监测系统（HPMS）权威要素图层的子图层。元数据