OS MasterMap Highways Network Product Family

This page gives context and information about the three products which make up the OS MasterMap Highways Network 'family' of products, giving a high-level summary of each product.

OS MasterMap Highways Network integrates Ordnance Survey's detailed road and path information with the authoritative sources of the National Street Gazetteer (NSG), the Trunk Road Street Gazetteer (TRSG) and the Scottish Street Gazetteer (SSG). These sources contain the definitive information provided by the Local and National Roads and Highways Authorities.

To bring this information together, where possible the geometry of streets captured by a Roads or Highway Authority is spatially matched to the geometry of OS Road Links and Path Links. Where this match is successful, the OS geometry is the base geometry used for the Highways Network, enabling the amalgamation of the NSG, SSG and TRSG with OS data. Where spatial matching cannot match the geometry captured by the Roads or Highway Authority to OS geometry, the Roads or Highway Authority geometry is used as the source geometry to represent the extent of the Street, ensuring that all USRNs and associated data provided are included in the product.

The OS MasterMap Highways Network product family includes three products:

• OS MasterMap Highways Network – Roads

• OS MasterMap Highways Network – Routing and Asset Management Information (RAMI)

• OS MasterMap Highways Network – Paths

The OS MasterMap Highways Network With Speed Data product was withdrawn from use in March 2024.

Average speed and indicative speed limits are now available to access directly from the OS National Geographic Database (OS NGD) Transport Theme. The OS NGD datasets are available under the Public Sector Geospatial Agreement (PSGA), and they make it easy to analyse travel times and provide accurate insight for safety and infrastructure policy decisions.

Product summaries

OS MasterMap Highways Network – Roads

OS MasterMap Highways Network – Roads data

The Roads product provides a topologically structured link and node representation of the road network and gives connectivity across Great Britain through ferry features. It provides information on names associated with the road network, being either the legal definitive view of a road name or the plated road name, plus road numbering, junction names and junction numbers.

In addition to naming information, the product also provides information on road classification, road function, primary routes and road node classification.

OS MasterMap Highways Network – Routing and Asset Management Information

OS MasterMap Highways Network routing data

The Routing and Asset Management Information (RAMI) product provides the same functionality as the Roads product, with additional information on both managing the road as an asset and routing information, which aids navigation.

The routing and asset management information integrates data from Ordnance Survey's large-scale information and the additional street data held within the NSG, TRSG and SSG. The routing information includes such aspects as vehicle restrictions, covering access, manoeuvres, and physical characteristics. The asset management information, on the other hand, provides details on the authority responsible for maintaining a road, how a road should be restored following street works and if there are any unusual conditions that the local highway authority have associated with a road.

OS MasterMap Highways Network – Paths

OS MasterMap Highways Network – Paths data

The Paths product provides a topologically structured link and node representation of the pedestrian path and ferry network throughout Great Britain. The path network will provide connectivity between the road network but will not provide a route which can be inferred from the road network. Instead, the path network can be connected to the road network within the Roads or RAMI products.

The Paths product provides information on names associated with the path network, the path function and its surface type. In addition to the network information, the product also provides asset management information which identifies the authority responsible for maintaining the path, how the path should be restored following street works and if there are any unusual conditions that the local highways or roads authority have associated to the path.