National Tunnel Inventory Element Data

The National Tunnel Inventory Elements dataset was compiled on September 02, 2025 and published on August 26, 2025 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 National Tunnel Inventory (NTI) is a collection of information (database) describing the more than 500 of the Nation's tunnels located on public roads, including Interstate Highways, U.S. highways, State and county roads, as well as publicly-accessible tunnels on Federal lands. The element data present a breakdown of the condition of each structural and civil element for each tunnel on the National Highway System (NHS). A data dictionary, or other source of attribute information, is accessible at https://doi.org/10.21949/1529051国家隧道清单要素数据集（National Tunnel Inventory Elements Dataset）于2025年9月2日编制完成，并于2025年8月26日由美国联邦公路管理局（Federal Highway Administration, FHWA）发布，隶属于美国运输部（U.S. Department of Transportation, USDOT）/美国运输统计局（Bureau of Transportation Statistics, BTS）下属的国家交通地图集数据库（National Transportation Atlas Database, NTAD）。国家隧道清单（National Tunnel Inventory, NTI）是一套收录全美公共道路上500余座隧道相关信息的数据库，涵盖州际公路、美国国道、州级与县级道路，以及联邦土地上对公众开放的隧道。该要素数据分项列明了国家公路系统（National Highway System, NHS）内每座隧道的各结构与土木构件的状态详情。数据字典或其他属性信息源可通过https://doi.org/10.21949/1529051获取。