National Highway Planning Network eng; USA 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646 information applies to the dataset Mark Sarmiento Federal Highway Administration (FHWA) GIS Planning Specialist 202-366-4828 1200 New Jersey Ave. SE Washington DC 20590 United States mark.sarmiento@dot.gov party who can be contacted for acquiring knowledge about or acquisition of the resource 2025-07-16 ISO 19139 Geographic Information - Metadata ISO/TS 19139:2007 curve 626366 National Highway Planning Network 1996-07-01 date identifies when the resource was brought into existence Federal Highway Administration (FHWA) party who created the resource map represented in raster or vector form The National Highway Planning Network (NHPN) dataset was compiled on May 01, 2014 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). This dataset is a comprehensive network database of the nation's major highway system. It consists of the nation's highways comprised of Rural Arterials, Urban Principal Arterials and all National Highway System routes. The data set covers the 48 contiguous States plus the District of Columbia, Alaska, Hawaii, and Puerto Rico. The nominal scale of the data set is 1:100,000 with a maximal positional error of 80 meters. A data dictionary, or other source of attribute information, is accessible at https://doi.org/10.21949/1529044 The primary purpose of this geospatial data set is to serve the FHWA needs in highway planning, policy analysis, visualization of the Highway Performance Monitoring System (HPMS) database and network modelling. Acknowledgment of the Federal Highway Administration (FHWA) and the Bureau of Transportation Statistics (BTS) [distributor]. data is continually being updated Mark Sarmiento Federal Highway Administration (FHWA) GIS Planning Specialist 202-366-4828 1200 New Jersey Ave. SE Washington DC 20590 United States mark.sarmiento@dot.gov party who can be contacted for acquiring knowledge about or acquisition of the resource data is updated as deemed necessary NTAD National Transportation Atlas Database Transportation Atlas Database vector line linear Roads Transportation Infrastructure USDOT NHPN Highway Planning Network keyword identifies a particular subject or topic none USA National keyword identifies a location none This NTAD dataset is a work of the United States government as defined in 17 U.S.C. § 101 and as such are not protected by any U.S. copyrights. This work is available for unrestricted public use. limitation not listed Access Constraints: unrestricted National Transportation Atlas Database 2022-06-13 publication Bureau of Transportation Statistics (BTS) party who published the resource reference to a master dataset of which this one is a part vector data is used to represent geographic data eng; USA transportation Native Dataset Environment: Version 6.2 (Build 9200) ; Esri ArcGIS 10.8.1.14362 -171.5 -67 18.5 71.5 2014-05-01 0 National Highway Planning Network Entity and Attribute Overview: This dataset is a comprehensive network database of the nation's major highway system. It consists of the nation's highways comprised of Rural Arterials, Urban Principal Arterials and all National Highway System routes. The data set covers the 48 contiguous States plus the District of Columbia, Alaska, Hawaii, and Puerto Rico. The nominal scale of the data set is 1:100,000 with a maximal positional error of 80 meters. Entity and Attribute Detail Citation: https://doi.org/10.21949/1529044 Open Data Catalog 1.0 ArcGIS REST Services Directory Feature Server (WFS) 11.5 ArcGIS Online Hosted Vector Tile Service June 2025 Bureau of Transportation Statistics (BTS) NTAD Program Manager 1200 New Jersey Ave. SE Washington DC 20590 United States ntad@dot.gov party who distributes the resource None. No fees are applicable for obtaining the dataset. https://doi.org/10.21949/1522161 http Open Data Catalog An ESRI Geodatabase, ESRI shapefile, or spreadsheet. online instructions for transferring data from one storage device or system to another https://doi.org/10.21949/1522163 http ArcGIS REST Services Directory Feature Server (WFS) complies with OGC WFS Map Service for visualizing geospatial information online instructions for transferring data from one storage device or system to another https://doi.org/10.21949/1522164 http ArcGIS Online Hosted Vector Tile Service ArcGIS Online Hosted Esri ArcGIS Vector Tile Service for visualizing geospatial information online instructions for transferring data from one storage device or system to another information applies to the dataset Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. The National Highway Planning Network was created by building the Node-Link Geometry for conflation. Steps include splitting line at intersection using ArcGIS planarize tool, creating node point features for the intersections, removing uncommon points in overpass/underpass. Conflation of NHPN is based on HPMS. Attribute is then conflated. Dual carriage treatments covert dual carriage from HPMS to a centerline. Simplify features using custom built ArcGIS tool. Mile marker calibration and line direction fix using custom built ArcGIS tool that takes into account the connectivity of adjacent links and the shape lengths. Dangling errors fix for overshoot and undershoot errors. Connectivity errors fix for overshoot and undershoot errors. Edge matching to connect interstates and other appropriate links from adjacent states. Topology validations to remove overlap errors. Record ID assignments using computer program to ensure unique ID assignment and to keep a connection to previous version of NHPN. data is updated as deemed necessary Mark Sarmiento Federal Highway Administration (FHWA) GIS Planning Specialist 202-366-4828 1200 New Jersey Ave. SE Washington DC 20590 United States mark.sarmiento@dot.gov party that accepts accountability and responsability for the data and ensures appropriate care and maintenance of the resource