🆕Technical specification

OS Multi-modal Routing Network (OS MRN) provides a fully connected road, rail, path and ferry network across Great Britain Road. It includes turn and vehicle access restrictions, road speed information, and modal change points where you can change transport mode.

Product Supply

OS MRN is available as a premium data download from the OS Data Hub. It is available as a Full Supply only, and customers can order full GB coverage or a customisable Area of Interest (AOI).


OS MRN is supplied in two formats:

  • Protocolbuffer Binary Format (PBF)

  • GeoPackage (GPKG)

PBF is an open source transfer format for vector GIS data created by the OpenStreetMap (OSM) community. PBF is an alternative to the original OSM XML format. PBF files are generally much smaller than OSM XML files and are faster to read and write.

GPKG is an open standard data format as defined by the Open Geospatial Consortium (OGC). GeoPackage is designed to be a lightweight format that can contain large amounts of varied and complex data in a single, easy to distribute and ready to use file.

Update frequency

OS MRN is updated monthly in line with updates of the OS transport network data.


OS MRN covers Great Britain.

Coordinate reference system

The coordinate reference system used by OS MRN is the World Geodetic System (WGS84: EPSG: 4326). This applies to both the PBF and GPKG formats.

The WGS84 spatial reference system uses the WGS84 geodetic datum. Positions on this projection are described as latitude and longitude, and coordinates are provided in decimal degrees.

The sub-sections in this Technical Specification describe the:

  • Feature types available within the OS Multi-modal Routing Network premium product.

  • Code lists used by attributes available in those feature types.

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