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TRO Discovery Project

Enabling transport systems of the future

Traffic Regulation Orders (TROs) are used to implement changes on the road network. They are used for such diverse things as:

  • changing features on the road like signs and speed limits

  • implementing parking restrictions and limiting the movements of HGVs in residential areas

  • allowing temporary closures for street parties, play streets and roadworks, and

  • experimental changes

The blanket term Traffic Regulation Order (TRO) is intended here to cover the wide variety of orders made under the Road Traffic Regulation Act 1984. These can also be known as Traffic Management Orders (TMOs) in London and off-street Parking Places Orders (PPOs) in car parks.

TROs can be permanent, temporary or experimental, and can apply to moving or stationary vehicles. The scope of the TRO Discovery includes all of these.

Watch this introductory video to the Discovery Project and read this introductory document outlining the scope of the project.



The TRO Discovery is progressing with momentum, and as such we have launched a number of additional surveys to explore

1)    the costs incurred by local authorities to create Permanent Order and Temporary Orders. These surveys can be found here
2)    the maturity of TRO Digitisation associated with features typically relating to TROs. This survey can be found here
3)    the needs of individuals/organisations for data typically associated with TROs. This survey can be found here

If you would like any further information or would like to participate in any follow up work, please email [email protected]


TRO Discovery

The Department for Transport supported by GeoPlace, the British Parking Association and Ordnance Survey are conducting a discovery into the process by which TROs are made, and how TRO data is made available and used across the country.

This will help identify how to deliver the most from the current system and how to support the transport network of the future.

This  project also contributes to the Industrial Strategy Grand Challenge to make the UK a world leader in shaping the Future of Mobility and follows a key recommendation in the North Highland Consultancy's report. This called for further work to modernise and digitise TROs. Its key findings relating to TROs were that:

  • TRO data is difficult and time consuming to access, clean and process,

  • TRO data is not in a standardised, machine readable format,

  • TROs lack of centralised point of reference,

  • Private sector organisations are being forced to collect TRO data manually, and

  • The current process for amending and implementing a TRO is labour intensive, time consuming, and costly.


We will engage widely with experts, and with people and organisations who require TROs to understand who is reliant on TROs, how the process works for them and how we might look to improve it in the future.

We will work with Local Highways Authorities to understand how they create TROs and manage their TRO data.

We will produce a guide to help Local Authorities understand how they can work within the limits of current legislation based on best practice in the current landscape.

We will develop a draft Data Model for TROs, a free resource for all. It will be compatible with Connected and Automated Vehicles (CAVs) and the international TRO landscape. This will support the move towards TROs being easily accessible to the public whether using apps or driving connected vehicles.

Get involved

As a first step - we are seeking to:

  1. gather a baseline of information on how organisations and individuals interact with the TRO process and associated data

  2. collect contact details for follow up activities and conduct more detailed user research.

We are doing this by doing some research on how people and organisations interact with TROs, whether you:

  • apply for TROs

  • create TROs

  • are involved TRO consultation process

  • have a requirement for TRO data




The Department for Transport aims to create a safe, secure, efficient and reliable transport system that works for the people who depend on it; supporting a strong, productive economy and the jobs and homes people need. The Department is leading on the Future of Mobility Grand Challenge which aims to make the UK the world leader in the movement of goods, people and service. The Department is also committed to make journeys easier, modern and reliable. One way we are doing this is by supporting the delivery of new digital technology to improve journeys.


GeoPlace LLP is a public sector limited liability partnership between the Local Government Association (LGA) and Ordnance Survey. GeoPlace is a world class expert in address and street information management, working internationally as well as in the UK to help our partners and customers maximise the value of their spatial information for better decision making. GeoPlace maintains a national infrastructure that supports the address and street information needs of the public and private sectors. Its work relies heavily on close working relationships with every local authority in England and Wales. This relationship has been developed over 15 years, to build the National Address Gazetteer infrastructure and National Street Gazetteer.  Ordnance Survey develops the range of AddressBase products from the National Address Gazetteer and OS MasterMap Highways Network from the NSG.  Both datasets underpin efficient and effective services, bringing direct service delivery benefits to users.


British Parking Association ( BPA) is a not for profit organisation, representing, promoting and influencing the parking and traffic management profession throughout the UK and Europe. Membership of more than 700 organisations and individuals includes local authorities, car park operators, retail parks, healthcare facilities, universities, railway stations, technology providers, trainers and consultants. This Discovery project evolved from work currently underway in the BPAs international initiative to develop global standards in parking data, the Alliance for Parking Data Standards.


Ordnance Survey (OS) is the national mapping agency for Great Britain, and a world-leading geospatial data and technology organisation. As a reliable partner to government, business and citizens across Britain and the world, OS helps its customers in virtually all sectors improve quality of life. OS expertise and data supports efficient public services and infrastructure, new technologies in transport and communications, national security and emergency services and exploring the great outdoors. By being at the forefront of geospatial capability for more than 225 years, we've built a reputation as the world's most inspiring and trusted geospatial partner. 


Further information around Traffic Regulation Orders


England and Wales


Northern Ireland

Useful links

For more information contact [email protected]