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National Highways provides a geospatial layer detailing the majority of the Highways England road network, including trunk roads and motorways. This data, formatted in the legacy HAPMS schema from the newer P-AMS system, indicates the spatial extent of the agency's maintenance responsibility. The dataset was last updated on 2026-05-01.
License is OGL-UK-3.0; users must comply with its terms. Data is provided in PDF and SHP/ZIP formats, requiring GIS software for spatial analysis.