Is the Tube actually underground?

Similar to the New York Subway or the Paris Metro, the London Underground is London's series of (largely) underground trains that run a regular service throughout the city. Since the trains underground run through a series of tunnels, many people (Londoners and visitors alike!) refer to it as the tube.



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Despite its name, only 45% of the system is under the ground: much of the network in the outer environs of London is on the surface.

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Despite its name, only 45% of the system is under the ground: much of the network in the outer environs of London is on the surface.

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Bakerloo, Central, Jubilee, Northern, Piccadilly, Victoria and Waterloo & City lines. These are all something called a “Deep Level” or “Deep Tube” line. This means they're circular tunnels bored deep underground.

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It is easier and safer to dig at depth in London because of the nature of the soil and to avoid other infrastructure and the Thames. It also may result from the fact that London is quite hilly and trains don't like going up hills, so the tube goes through the hill. Some stations are above ground.

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The London Underground (also known simply as the Underground or by its nickname the Tube) is a rapid transit system serving Greater London and some parts of the adjacent home counties of Buckinghamshire, Essex and Hertfordshire in England.

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The heat in the tunnels is largely generated by the trains, with a small amount coming from station equipment and passengers. Around 79% is absorbed by the tunnels' walls, 10% is removed by ventilation, and the other 11% remains in the tunnels.

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How to Survive a Fall Onto Subway Tracks
  1. Look for others who can help you back onto the platform by offering a hand and pulling you up.
  2. Tuck into an alcove or underneath the platform where you can fit.
  3. Stand between two sets of tracks where there is typically enough clearance to be safe.


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London Underground train speeds vary across our network, from as slow as 15MPH, up to 60MPH. The speed of the trains can be impacted by a range of factors including the track infrastructure, the type of signalling system, the distance between stations, and the frequency of services in the timetable.

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The Metropolitan line is the oldest underground railway in the world. The Metropolitan Railway opened in January 1863 and was an immediate success, though its construction took nearly two years and caused huge disruption in the streets.

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London Underground, also called the Tube, underground railway system that services the London metropolitan area.

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