国家公路货运网络（NHFN）数据集于2023年1月27日由联邦公路管理局（FHWA）编制，属于美国交通部（USDOT）/运输统计局（BTS）国家运输图集数据库（NTAD）。国会依据《美国法典》第23编第167条设立了新的国家公路货运计划（NHFP），旨在提升国家公路货运网络（NHFN）上的货运效率，并支持若干既定目标。该法律要求FHWA局长战略性地引导联邦资源与政策，以改善该网络的运行绩效。NHFP通过公式拨款方式，每年向各州分配资金，专用于NHFN相关项目。NHFN的定义载于《美国法典》第23编第167(c)条，由四个独立的公路网络组成部分构成：主要公路货运系统（PHFS）、关键农村货运走廊（CRFCs）、关键城市货运走廊（CUFCs），以及未纳入PHFS的州际公路系统部分。主要公路货运系统（PHFS）：该系统由经可量化、客观的全国性数据识别出的、对美国货运运输系统最为关键的公路路段组成。该网络总长41,800英里中心线里程，其中包括38,014英里中心线里程的州际公路和3,785英里中心线里程的非州际公路。未纳入PHFS的其他州际公路路段：指未列入PHFS的剩余州际公路路段，为货运运输设施提供重要的连通性与可达性。此类路段在全国范围内估计达10,265英里中心线里程，其具体长度将随州际公路系统的增减而动态变化。关键农村货运走廊（CRFCs）：

The National Highway Freight Network (NHFN) dataset was compiled on January 27, 2023 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). Congress established a new National Highway Freight Program (NHFP) in 23 U.S.C. 167 to improve the efficient movement of freight on the National Highway Freight Network (NHFN) and support several goals. The law required the FHWA Administrator to strategically direct Federal resources and policies toward improved performance of the network. The NHFP provides formula funding apportioned annually to States, for use on the NHFN. The definition of the NHFN is established under 23 U.S.C. 167(c) and consists of four separate highway network components: the PHFS; Critical Rural Freight Corridors (CRFCs); Critical Urban Freight Corridors (CUFCs); and those portions of the Interstate System that are not part of the PHFS. Primary Highway Freight System (PHFS): This is a network of highways identified as the most critical highway portions of the U.S. freight transportation system determined by measurable and objective national data. The network consists of 41,800 centerlines miles, including 38,014 centerline miles of Interstate and 3,785 centerline miles of non-Interstate roads. Other Interstate portions not on the PHFS: These highways consist of the remaining portion of Interstate roads not included in the PHFS. These routes provide important continuity and access to freight transportation facilities. These portions amount to an estimated 10,265 centerline miles of Interstate, nationwide, and will fluctuate with additions and deletions to the Interstate Highway System. Critical Rural Freight Corridors (CRFCs): These are public roads not in an urbanized area which provide access and connection to the PHFS and the Interstate with other important ports, public transportation facilities, or other intermodal freight facilities. Nationwide, there are 5,389 centerline miles designated as CRFCs as of January 27, 2023. CRFCs are not included in GIS data base. Critical Urban Freight Corridors (CUFCs): These are public roads in urbanized areas which provide access and connection to the PHFS and the Interstate with other ports, public transportation facilities, or other intermodal transportation facilities. Nationwide, there are 2,656 centerline miles designated as CUFC as of January 27, 2023. CUFCs are not included in GIS data base. A data dictionary, or other source of attribute information, is accessible at https://doi.org/10.21949/1529856