FHWA

Overview This feature service provides spatial information related to roads managed or classified by the Federal Highway Administration (FHWA) in the San Francisco Bay Area region. It encompasses data on road segments and associated attributes relevant to federal highway planning and management. Feature Layers FHWA Roads Layer: This layer contains detailed road segments with descriptive attributes such as FHWA classification descriptions and route highway group (RHG) names and numbers. It also includes metadata on data creation and updates, supporting data currency assessment. Geographic Coverage The data covers a portion of the San Francisco Bay Area, California, reflecting roadways within several counties based on the spatial extent of the service. Use Cases Transportation planning and management for federal and state agencies. Infrastructure maintenance and monitoring of federally classified highways. Geospatial analysis and mapping of federal road networks in the region.

概述 本要素服务提供与旧金山湾区范围内由美国联邦公路管理局（Federal Highway Administration，FHWA）管理或分级的道路相关的空间信息，涵盖了与联邦公路规划及管理相关的道路路段数据及其关联属性。
要素图层：FHWA道路图层。该图层包含带有描述性属性的详细道路路段，属性包括FHWA分级说明以及路线公路组（Route Highway Group，RHG）的名称与编号，同时还包含数据创建与更新的元数据，可用于评估数据的现势性。
地理覆盖范围 本数据覆盖加利福尼亚州旧金山湾区的部分区域，依据该服务的空间范围，涵盖了多个郡内的道路网络。
应用场景 面向联邦与州级机构的交通规划与管理工作；开展联邦分级公路的基础设施维护与监测；实现该区域内联邦公路网络的地理空间分析与制图。