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OS MasterMap Highways Network

A local and central partnership

GeoPlace together with all 173 highways across England and Wales has been working in partnership with Ordnance Survey and the Department of Transport to create and maintain OS MM Highways Network with data from all sectors of the highway authority community; local, regional and national.  This includes authoritative information from the National Street Gazetteer (NSG) and Trunk Road Street Gazetteer (TRSG) for streets in England and Wales. The data is used by authorities to coordinate and manage all road works they carry out, alongside Street works carried out by statutory undertaker.









Andrew Jones, Parliamentary Under Secretary of State for Transport, at OS MM Highways launch
with Baz Lokat (GeoPlace) and Mark Lepage (OS)

OS MasterMap® Highways Network

To access and fomd out more about the Highways Network ,  see the OS website -


OS MasterMap® Highways Network includes a highly accurate road network geometry and joins together OS high-quality, accurately surveyed data with features from the National Street Gazetteer which contains the Unique Street Reference Number (USRN), street name, road number and maintenance responsibility, ESU (Elementary Street Unit).

Whilst it is believed that OS MasterMap® Highways Network will be widely used by the whole of the public as well as private sectors, it will not replace the role of the NSG in the process for the notification and management of streetworks which is underwritten by statute.


GeoPlace's role

GeoPlace and the local highways authorities have played a fundamentally important role in the development of the dataset and in the ongoing updating and maintenance of the product.

Richard Mason, Managing Director for GeoPlace said: "The new highways dataset is a true blueprint for Britain's road network, created by bringing authoritative data from local highways authorities together with expertise from Britain's mapping agency, Ordnance Survey.  Current, authoritative and unambiguous information about the street network is fundamental to all aspects of everyday life. This new detail rich product from OS will help improve planning and maintenance, and ensure traffic in Britain keeps moving efficiently and safely.  I am delighted that GeoPlace has been able to play such a key role in its development."

David Henderson, Director of Products at Ordnance Survey said; "By tapping into GeoPlace's unique relationship with every local authority in England and Wales, and the wider highway management community, we were delighted to partner with GeoPlace in our product development. Benefitting from years of knowledge and experience, the GeoPlace team helped us save crucial time in the understanding, formation and the development of the workflow that sits behind our production processes. Furthermore, we have established a collaborative production environment that can be built upon in the future.

The team at GeoPlace worked closely with us to assist in the development of data requirements, the data specification, and the long term product roadmap. Their collaborative approach and support throughout the life cycle of the project, coupled with their industry knowledge and expertise of the community has been instrumental to ensuring the future success of the product."

More information about OS MasterMap® Highways Network, including the specification, can be found on the OS website here:

Also see the following information sheets: