100 years of A-roads

100 years of A-roads

100 years
of A-roads

The British road numbering system

2023 marks 100 years since the Great Britain road numbering scheme was introduced. Before this, if you weren’t a local, it was very difficult to tell one road from another, and new car owners often got lost when driving longer distances. The Government’s new roads investment programme also meant that it was vital to know which road was which, and to track how money was being invested.

To make sense of the road system, each one was given a single letter to represent its category, followed by one or more numbers. Important roads between large towns and cities, and major connecting routes, became classified as A-roads. Perhaps the most famous road to be renamed was the Great North Road from London to Inverness, which became the A1. In 1936, the Trunk Roads Act created a national strategic road network, and would later come to include the new Motorways, which began to open in the late 1950s.

Keeping the country moving

Modern A-roads still play a vital role in helping millions of people to travel smoothly, speedily, and safely across the country. The roads often cover long distances and take through traffic away from busy towns and city centres.  For thousands of businesses, A-roads are essential to their commercial success and growth, and they depend on them for sourcing workers, receiving supplies and making deliveries.

Today, A-roads make up over half of England’s strategic road network, which is 4,300 miles of trunk roads and motorways. Although these roads are in England, they play an essential role in connecting all parts of the United Kingdom. A-roads often follow routes that have been used by people and communities for centuries. At National Highways we’re committed to our responsibility for the ongoing stewardship and evolution of these important roads, now and for the future.

The A3

Over a decade ago, we opened the Hindhead Tunnel, which took the A3 under the Devil’s Punch Bowl in Surrey and meant the old A3 could be restored to heathland. As part of our upgrade to the A3 Wisley interchange at junction 10 of the M25, we’re reinstating lost heathland and creating the UK’s very first heathland bridge.






The A1

The A1 takes the route of the Great North Road, the main highway connecting the capital cities of England and Scotland. The A1 covers 410 miles and is the longest numbered road in the UK. The importance of this connection is why it was given the number ‘1’ when it became Britain’s first numbered road in 1921.

The A1 not only connects the UK, but is also part of a key route providing access to international destinations. It links several airports, including Heathrow and Stansted, as well as vital trade ports such as Felixstowe. Passing through 17 counties and supporting many businesses that flourish alongside it, the A1 is an essential corridor, used by commuters, hauliers and holiday makers alike.

3 mins

The A12

If you regularly drive on the A12 in the east of England, you’re travelling a route that Roman warriors, Celtic fighters and medieval rebels have taken before you.

Parts of the London to Lowestoft route date back over 2,500 years, to the time of the Celts. Roman Britons gave it a makeover, creating one of the country’s first paved roads and extending it to their capital, Colchester. In 1922, the route became the A12 as part of the Great Britain road numbering scheme.

In this video we take a look at the A12’s fascinating history, and also at our plans for its future.

3 mins

The A30

What we now call the A30 stretched from London to Land’s End and was the route stagecoaches took to the south west. But it was also the haunt of highwaymen who robbed passengers of their riches.

Nowadays things are very different. The A30 is still vital to the region, but today’s journeys are much safer and smoother. In the summer months, Cornwall gets busy as tourists head to beaches and attractions like the Eden Project and Land’s End.

Over the years we’ve upgraded parts of the A30 to dual carriageway. The Chiverton to Carland Cross project is our latest scheme, designed to ease congestion and help the local economy to grow.

3 mins

The A46

The A46 supports 2.9 million jobs, has an economic output of some 115 billion and sustains nearly 10% of England's economy. The A46 stretches over 200 miles between Gloucestershire and Lincolnshire it’s a crucial trade and export link to motorways, key ports, and airports.

It has always been crucial to our economy, it was central to the growth of the British Motor industry and the rise of iconic companies like Jaguar and Standard Motors. Today the A46 supports a wealth of industries from agriculture to tourism and logistics. It's even attracting new fast-growing businesses like electric vehicle battery plants and computer game developers. The A46 will be helping to keep the wheels of industry rolling long into the future.

3 mins

A Roads To Summer competition logo


A-Roads to Summer competition

And the winners are...

Amidst fierce competition, an overwhelming number of entries, and a display of remarkable talent, the moment we've all been eagerly awaiting has arrived.

The winners of the A-Roads to Summer competition have emerged. They have exhibited talent and delivered outstanding creativity and imagination that have captivated the judges.

Congratulations to

  • Ms Oinn (Hampshire)
  • Ms Broderick-Fox (Greater London)
  • Ms Atyeo (Devon)
  • Ms Williams (Lancashire)
  • Ms Cottle (Shropshire)
  • Ms Callan (Northumberland)

The winning images

County: Greater London
County: Northumberland
County: Lancashire
County: Hampshire

The winning videos

County: Devon
County: Shropshire

We would also like to express our gratitude

to everyone who entered the 'A-roads to Summer' competition. Your enthusiasm and participation made this event truly special. With over 180 entries, we were thrilled to see the incredible response and the effort you all put in. We appreciate your creativity, dedication, and making the competition a remarkable success.