Adjusted Urban Areas

The 2020 Adjusted Urban Areas dataset was compiled on December 31, 2020 from the Federal Highway Administration (FHWA) and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics (BTS) National Transportation Atlas Database (NTAD). The 2020 Federal Highway Administration (FHWA) Adjusted Urban Areas layer delineates the boundaries of adjusted urban areas as defined by the FHWA, based on the 2020 U.S. Census urban area boundaries. This nationwide geospatial dataset represents urbanized areas that have been modified through coordination between FHWA Division Offices, State Departments of Transportation (DOTs), and Metropolitan Planning Organizations (MPOs), in accordance with FHWA's Urban Area Boundary Adjustment guidelines. These boundaries are used for transportation planning and programming, eligibility determinations, and analysis purposes related to Federal-aid highway programs. A data dictionary, or other source of attribute information, is accessible at https://doi.org/10.21949/tnd1-3z352020年调整城市区域数据集（2020 Adjusted Urban Areas Dataset）于2020年12月31日由美国联邦公路管理局（Federal Highway Administration, FHWA）编制，隶属于美国运输部（U.S. Department of Transportation, USDOT）与美国运输统计局（Bureau of Transportation Statistics, BTS）的国家交通地图集数据库（National Transportation Atlas Database, NTAD）。 2020年美国联邦公路管理局调整城市区域图层基于2020年美国人口普查城市区域边界，划定了美国联邦公路管理局定义的调整后城市区域范围。这份全国性地理空间数据集涵盖了经美国联邦公路管理局各分局、州运输部门（State Departments of Transportation, DOTs）及都市规划组织（Metropolitan Planning Organizations, MPOs）协作修订的城市化区域，修订工作严格遵循美国联邦公路管理局发布的《城市区域边界调整指南》。 上述边界可用于与联邦援助公路项目相关的交通规划与项目编制、资格认定及分析工作。可通过https://doi.org/10.21949/tnd1-3z35 获取数据字典或其他属性信息来源。