National Highways celebrates 100 years of road numbers

31/03/2023 | NATIONAL HIGHWAYS

The 1 April marks 100 years since the introduction of A roads, as the new numbering system for Great Britain was published.

Before road numbering was introduced, local authorities found it difficult to keep track of maintenance work, central government had no accurate measure of how far apart towns were, or what state any of its roads were in.

Travellers had difficulty finding their way around, because one road was much like every other, and road signs were poor.

The Ministry of Transport was formed in 1919 and given authority to classify highways and allocate funding for road maintenance.

The definitive list of major roads was published on 1 April 1923, following consultations with local authorities. Each road was given a single letter, denoting the road’s category, and a subsequent number of between one and four digits.

Road numbering enabled significant progress in how roads were funded, managed and used. It made it easier to know which road you should be taking to your destination. And with the clever radial system, there was a subtle helping hand; if the road number didn’t begin with a 2 , you were not heading through Kent to Dover.

It gave continuity to the route as well, given how many roads change names multiple times.

Of course, a lot has changed over the last 100 years since the road numbers were first introduced. With the original aspiration of having A roads at the top of the league, when motorways were first introduced a new letter was needed.

A roads make up 58% of the strategic road network, many of them with ancient origins. These roads have linked communities and enabled trade for centuries. Today’s much larger population and current lifestyles mean that, while today’s strategic A roads often follow the general route of the original road, the road itself would be unrecognisable to a Roman highway engineer.

Over the years many A roads have been upgraded, with projects to widen or even bypass the former route. And the projects have ranged from smaller junction improvements to multi-billion pound projects such as the A3 Hindhead tunnel that has now taken long distance traffic away from the village and restored tranquillity.

In England and Wales, the road numbering system for all-purpose (i.e. non-motorway) roads is based on a radial pattern centred on London. In Scotland the same scheme is centred on Edinburgh:

  • A1 London to Edinburgh
  • A2 London to Dover
  • A3 London to Portsmouth
  • A4 London to Avonmouth
  • A5 London to Holyhead
  • A6 London to Carlisle
  • A7 Edinburgh to Carlisle
  • A8 Edinburgh to Greenock
  • A9 Edinburgh to Scrabster

The numbers of the roads changed quite frequently during the early years of the system, because of the rapid expansion of the network.

A1 / Great North Road

The Great North Road was the main highway between England and Scotland from medieval times until the 20th century. It became a coaching route used by mail coaches travelling between London, York and Edinburgh. The modern A1 mainly parallels the route of the Great North Road.

The A1 is the longest numbered road in the UK, covering 410 miles (660 km). It connects London, the capital of England, with Edinburgh, the capital of Scotland. The importance of this connection is why it was given the number 1 when the road numbering system was developed.

The A1 passes through 17 counties including Greater London, Nottinghamshire, North, West and South Yorkshire, Northumberland and the Scottish Borders.

There is an enduring public interest in the A1, around its history, the communities and industries it serves, and the improvements National Highways has made to it.

Scotswood to North Brunton scheme

National Highways’ Scotswood to North Brunton scheme is an excellent example of the human, economic and environmental benefits achievable through continued investment in A roads.

The scheme will provide economic benefits for business users and freight, with improved links between places of economic importance, such as the Team Valley Employment Zone, the Metro Centre and Newcastle Airport. It will:

  • provide a safe and serviceable network
  • help traffic flow more freely
  • improve the environment
  • provide an accessible and integrated road network.

More broadly, the Scotswood to North Brunton scheme represents continued investment in, and improvement of, the longest numbered road in the UK.

A roads in numbers

  • National Highways manages around 2,600 miles of major A roads in England, and nearly all motorways. Other roads are managed by local authorities.
  • Major A roads are technically called all-purpose trunk roads (APTR).
  • The Great North Road, linking London and Edinburgh, became the A1 in 1921.
  • The comprehensive road numbering system in Great Britain came into effect in April 1923.
  • The road number A122 has been identified for the new 14.3-mile road that will link Essex with Kent, running through the Lower Thames Crossing.
  • The A4545 will be the brand new link road being built as part of its £282m upgrade of the M42 Junction 6 near Solihull. It will be the first new A road to be named in the Midlands region for almost 17 years.

Highways InProfile

latest magazine issue
Highways jobs

Senior bridge Engineer - WMF2212e

£47,181 - £48,226
You will be the key responsible engineer for this area and will also provide technical advice and guidance to our team Cumbria / Various
Recruiter: Westmorland and Furness Council

Streetcare Operative / LGV Driver - WMF2214e

£28,598 - £29,540
Westmorland and Furness Council is seeking to employ an enthusiastic and motivated LGV Driver / Street Care Driver Ulverston, Cumbria
Recruiter: Westmorland and Furness Council

Civil Enforcement Officer - WMF2221e

£28,598 - £29,540
Are you seeking an active and challenging role, part of a friendly and welcoming team? Kendal, Cumbria
Recruiter: Westmorland and Furness Council

Bridge Engineer - WMF2219e

£42,839 - £44,075
We are currently seeking to recruit an experienced and enthusiastic Bridge Engineer Kendal, Cumbria
Recruiter: Westmorland and Furness Council

Senior Public Transport Officer

£42,839 - £46,142
We are looking for an experienced public transport professional to become our Senior Public Transport Officer. Northamptonshire
Recruiter: North Northamptonshire Council

Principal Transport Planner (Strategy) (Fixed-Term)

£48,226-£51,356
We are looking for an experienced professional to join as a Principal Transport Planner (Strategy) Northampton, Northamptonshire
Recruiter: North Northamptonshire Council

Mobile Street Scene Operative

£24,796 to £25,989 per annum
The Waste and Street Scene department requires enthusiastic and committed mobile street cleansing operative. Northallerton, North Yorkshire
Recruiter: North Yorkshire Council

Senior Technician - Highways Design (2 Posts)

Grade 10 £35,422 - 38,730 per annum
An exciting opportunity has arisen within the Professional Services Section Derbyshire
Recruiter: Derbyshire County Council

Project Engineer External Contracts

Grade 11 £39,865 - 43,270 per annum
You will lead a team of Clerks of Works Derbyshire
Recruiter: Derbyshire County Council

Senior Technician - Clerk of Works

Grade 9 £32,347 - 34,317 per annum
You will supervise works on site and liaise with developers, contractors and internal teams Derbyshire
Recruiter: Derbyshire County Council

Hire Desk Operative

Grade 8 £29,719 - £31,691 per annum
Well-developed IT skills and an excellent working knowledge of the Microsoft Suite are required. Derbyshire
Recruiter: Derbyshire County Council

Streetcare Operative / LGV Driver - WMF2214e

£28,598 - £29,540
Applicants must hold a current full LGV Class C driving licence Cumbria
Recruiter: Westmorland and Furness Council

Roadworker Trainee LGV Driver (2 Posts)

Grade 6 £25,989 - £26,458 per annum
We’re looking for Roadworker/trainee LGV drivers Derbyshire
Recruiter: Derbyshire County Council

Roadworker/Driver (3 Posts)

Grade 7 £27,088 - £29,062 per annum
We’re looking for roadworker/drivers to be part of our team undertaking major highway, bridge Derbyshire
Recruiter: Derbyshire County Council

Senior Engineer - Public Realm

£28,624 - £36,124
We are looking for a Senior Engineer to support the development Huddersfield, West Yorkshire
Recruiter: Kirklees Metropolitan Council

Mobile Cleansing Operative

£24,796 to £25,989 per annum
We’re seeking a permanent Mobile Street Cleansing Operative to join our dedicated team serving a variety of urban and rural locations Harrogate, North Yorkshire
Recruiter: North Yorkshire Council

Roadworker/Driver

Grade 7 £27,088 - £29,062 per annum
We’re looking for experienced Roadworker/LGV Drivers High Peak, Derbyshire
Recruiter: Derbyshire County Council

Engineer - Hosting and Security

£35,412 to £39,152 p.a. (Grade 9)
A vacancy has arisen within our Hosting and Security Team for an experienced, enthusiastic, and flexible Engineer, with the aim of helping to ensure t Durham
Recruiter: Durham County Council

Senior Engineer - Highways Safety

£28,624 - £36,124
Senior Engineer - Highways Safety Huddersfield, West Yorkshire
Recruiter: Kirklees Metropolitan Council

Head of Parking

£86,274 - £89,667
Our borough is beginning a huge transformation. Redbridge, London (Greater)
Recruiter: Redbridge London Borough Council
SUBSCRIBE NOW

Latest Video

Subscribe to Highways today to ensure you keep your finger on the pulse of everything happening in the UK road network throughout the year.

SUBSCRIBE NOW