London Underground

The London Underground is a massive rapid transit system in England.

It serves Greater London and parts of the home counties, including Buckinghamshire, Essex, and Hertfordshire. Often called the Underground or the Tube, it is a vital part of the city's transport network. The system is managed by Transport for London. Today, the network includes 11 different lines. It consists of 272 stations that facilitate up to 5 million passenger journeys every single day. In the 2024/25 period, the system recorded 1.216 billion journeys.

There are two primary ways the tunnels were constructed. The first method is known as cut-and-cover. This was used for sub-surface lines, where workers dug up the ground and then covered the tracks again. The second method involved digging smaller, roughly circular tunnels at much deeper levels. These deep-level tunnels are what gave the system its nickname, the Tube. Interestingly, only 45% of the entire system is actually located underground. Much of the network in the outer areas of London sits on the surface.

The history of the system began with the Metropolitan Railway. It opened on 10 January 1863 as the world's first underground passenger railway. This early line ran between Paddington and Farringdon. It used steam locomotives to haul gas-lit wooden carriages. Even though the steam engines produced sulphurous fumes, the line was a major success. It carried 9.5 million passengers during its very first year.

To prepare for this, a short test tunnel was built in 1855 in Kibblesworth to study geological properties.

As the network grew, technology changed how the trains moved. The City & South London Railway opened in 1890. It was the first line to operate using underground electric traction trains. This line is now part of the Northern line. Later, different companies competed to modernize their services. The District and Metropolitan railways eventually had to electrify their sections. While there were debates over using AC or DC electrical systems, the DC system was eventually adopted for many lines. This shift away from steam helped solve problems with heat and pollution in the tunnels.

The modern look of the Underground was shaped by several key figures. In 1916, Edward Johnston created the Johnston typeface. The system also uses a famous symbol called the roundel.

In 1931, Harry Beck designed the schematic Tube map. This map uses a simplified design to show how lines connect. It was voted a national design icon in 2006.

Today, the Beck map has expanded to include other systems like the Elizabeth line and the London Overground.

Ownership and management of the system have changed many times. Originally, many lines were owned by different private companies. In the early 20th century, these were brought together under the Underground brand. In 1933, they merged to form London Transport under the London Passenger Transport Board. Now, the system is operated by London Underground Limited. This company is a wholly owned subsidiary of Transport for London. This structure helps manage the massive costs of the network. In fact, 92% of operational expenditure is covered by passenger fares.

Traveling on the system has also become more high-tech over the years. In 1983, the Travelcard ticket was introduced to help passengers. In 2003, the system moved to a contactless ticketing method called the Oyster card.

A major milestone occurred in 2014 when contactless bank card payments were introduced. This was the first time such a system was used on public transport. These changes make it much faster for millions of people to move through the city every day.