Great Britain’s vast road network doesn’t stop growing.

It has grown so large that, in theory, it could stretch all the way to the Moon.

The latest official figures from the UK’s Department for Transport drive these latest conclusions.

Tarmac taming

By the end of 2025, the total length of roads across Great Britain reached 247,200 miles, highlighting the immense scale of the country’s transport infrastructure.

The figure is notable not only for its size, but also for slightly exceeding the average distance between Earth and the Moon, which is roughly 238,855 miles.

Despite the attention-grabbing comparison, the data also shows that Britain’s road network has grown relatively modestly in recent decades.

Since 2005, the network has expanded by just over 6,000 miles, representing an increase of around 2.5%.

In 2005, Great Britain had approximately 241,139 miles of road, itself a 11% rise compared with the previous two decades.

Road reasoning

While the network continues to expand slowly, the majority of Britain’s traffic is concentrated on a relatively small proportion of roads.

Motorways and A-roads carry around 65% of all motor traffic, yet they account for only 13% of the total road length.

Britain has approximately 2,300 miles of motorway and 29,700 miles of A-roads, forming the backbone of long-distance and high-capacity travel.

In contrast, the vast majority of roads are smaller local routes, such as B and C roads and unclassified roads, which collectively make up the bulk of the network but carry far less traffic.

The difference in usage between these road types is stark.

On an average day, a stretch of motorway can see around 55 times more vehicles than an equivalent length of B or C road.

This imbalance highlights the heavy reliance placed on major routes to keep people and goods moving across the country.

Regionally, England dominates the network, accounting for the majority of the country’s roads.

Of the 247,200 miles recorded, around 189,900 miles are located in England, spanning everything from busy urban streets to rural lanes.

Elsewhere, the road network is considerably smaller.

Wales has roughly 37,200 miles of road, while Scotland accounts for about 21,100 miles.

Combined, the two nations account for less than a quarter of the total road mileage in Great Britain.

Holed on

Despite the gradual increase in road length, large-scale expansion is unlikely to be a major focus in the coming years.

The Government’s recent 10-year Infrastructure Strategy emphasises maintaining and improving existing roads rather than building large numbers of new ones.

For many drivers, that shift in priorities may be welcome.

Road conditions have become a growing concern across the country, with potholes continuing to frustrate motorists and damage vehicles.

Industry estimates suggest there are more than one million potholes on UK roads.

According to the Asphalt Industry Alliance, it could cost up to £16.8 billion to bring roads in England and Wales up to an ideal standard.

As a result, investment is increasingly expected to focus on repairs, resurfacing and upgrades rather than expansion.

Maintaining the current network is seen as essential for supporting everyday travel, local economies and freight transport.

Beam me up

Even so, the scale of Britain’s roads remains remarkable.

From major motorways carrying tens of thousands of vehicles a day to quiet rural lanes winding through the countryside, the network forms a crucial part of daily life.

While few drivers will ever travel the entire system, the latest figures show that if the roads of Great Britain were somehow joined end to end, they would stretch far enough to reach one of humanity’s distant and fascinating neighbours — the Moon