Why are some tube lines so loud?

According to Luis Gomez-Agustina, who teaches an acoustic course at London Southbank University, “the fact that most of the [London] Underground stations' surface materials are acoustically hard – [they are] highly reflective, they do not absorb sound – facilitates the noise generated to stay within the space for ...



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He added: 'The Central line has the loudest section out of all of the tube lines, and it basically gets as loud as almost 110dB. ' The Jubilee, Central, Victoria and Bakerloo lines were also recorded to be louder than 105dB on ten different occasions.

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Researchers have found the underground lines with the most polluted air are the Northern, Bakerloo, Jubilee and Victoria – because they are the deepest.

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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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Roding Valley is the most lightly used station on the Underground. It is also one of the twelve tube stations not to have ticket barriers.

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The Waterloo & City and the Jubilee were the coolest lines, while the Metropolitan and Hammersmith & City attracted fewest complaints. TfL said air-conditioned trains were in use on 40 per cent of the Underground network. New trains due to be introduced on the Piccadilly line from 2025 will also have air conditioning.

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Not including the Elizabeth line, which technically is not a standard Tube line, the line which is the fastest therefore is the Metropolitan Line. It is the fastest line on average across London but also has the fastest stretch of line - where trains can reach that magic speed of 60mph.

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It has been recognised that on certain Piccadilly line trains the PA has been over-loud. Upon investigation, London Underground (LU) has found that the Piccadilly line train fleet's existing noise detector is compensating for very loud background noise (which is outside the human hearing range).

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The Victoria Line is teeming with bacteria, having the highest number of germs of all the Tube lines. Touching your face after coming into contact with dirty seats and handles can transfer a whole host of blemish-causing bacteria.

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Metropolitan line Opened in 1863, The Metropolitan Railway between Paddington and Farringdon was the first, urban, underground railway in the world. An extension from Baker Street to Swiss Cottage in 1868, however, put an end to this claim to fame.

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The Jubilee Line (silver grey) operates from Stanmore to Stratford in east London. The Jubilee Line is the most recent line on the network and opened in 1979. 36.2 km in length it has 27 stations.

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There are five London boroughs (Bexley, Bromley, Croydon, Kingston upon Thames and Sutton) which have never been served by the Underground system.

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Why is it called the Bakerloo line? A journalist coined the nickname Bakerloo in a newspaper column as a contraction of the Baker Street & Waterloo Railway, shortly after it opened in 1906, and it was quickly adopted by the company. Early maps feature the full name, but by summer 1908 Bakerloo was used.

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Now in service alongside the London Underground, it has several notable differences that set it apart from the Tube, from the trains themselves to the line's operation. First and foremost, it is not a 'tube line' – it is a regular national railway line.

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The current operator, London Underground Limited (LUL), is a wholly owned subsidiary of Transport for London (TfL), the statutory corporation responsible for the transport network in London.

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Metropolitan. Our study showed that the Metropolitan is the cleanest Tube line in London. With the lowest levels of bacteria, passengers have a much smaller chance of coming into contact with germs that cause skin infections and other illnesses.

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The Northern line is a London Underground line that runs from North London to South London. It is printed in black on the Tube map. The Northern line is unique on the Underground network in having two different routes through central London, two southern branches and two northern branches.

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