Anonymous
Anonymous asked in Cars & TransportationRail · 1 decade ago

On the tube how do the trains turn around when it's the last stop?

Update:

London underground: like they can't go back on the same line so how do they turn round, or get to the otherside?

Update 2:

I know that the circle line goes round in a circle

Update 3:

But how can it travel backwards on one line. I'm talking about in london.

If it traveled back it would crash in to the normal train

Update 4:

i know they have driver seats at both ends i'm talking about the TUBE LONDON UNDERGROUND

26 Answers

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  • 1 decade ago
    Favorite Answer

    By the use of a system known as points. They don't crash into a train coming in the other direction as they are switched to the other track. Go to a surface station like Edgware on the Northern Line and watch how the trains come in on one line, the driver walks to the other end, then when they leave they are switched to the London bound track. The same thing happens underground, where applicable (apart form the Kennington Loop, already mentioned) but you just don't see it. The other alternative is that there are 'turn back sidings' in a middle tunnel (there is on a Liverpool Street on the Central) The train terminates, the doors close, the driver drives it into the siding, walks through the train to the other cab and when he is ready to depart the points change directing his train on to the correct track

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  • 1 decade ago

    Why are you "SHOUTING"?

    All Tube trains are double ended. At the end of the line the driver goes to the other end of the train and drives forward.

    The trains cross over to the other line (all Underground 'Tube' lines are double track for most of their length) so there is no conflict with oncoming trains. If there is a section of single track at the end of the line then 'incoming' trains wait until the 'returning' train clears it. These single track sections are rare and not long.

    The London Underground trains all pass on the left just like mainline trains and road vehicles.

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  • 1 decade ago

    It's a bit like above ground when an 8 coach train splits into 4 and they both go the same way at first but small parts of the line move to the other track and they can move back. This makes the train switch.

    When underground the train terminates at the last station the driver walks to the other end. Then the small parts of the track move the train onto another line that goes back the other way. It is all done before the next train gts to the staition.

    Happy to help, email me if you understood =).

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  • Anonymous
    1 decade ago

    It depends on the terminus concerned.

    At most stations, the drivers walk to the other end of the train, because there is a driving cab at each end.

    There are four exceptions to this rule.

    At Kennington on the Northern Line, there is a terminal loop passing beneath the through running lines to/from Morden

    At Heathrow on the Piccadilly Line, when the system is fully operational, all trains will follow a uni-directional loop : Hatton Cross - Heathrow Terminal 4 - Heathrow Terminals 1, 2, 3 - Hatton Cross.

    The Circle Line has no turning movements, but driver reliefs are usually taken at Aldgate (where any excess layover is also taken). Some driver reliefs (especially on a Sunday) are taken a Edgware Road.

    Although Hainault on the Central Line is actually a terminus from both directions (and, hence, the drivers change ends), there are certain trains that operate "through" Hainault without the driver changing ends.

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  • Anonymous
    1 decade ago

    There is a Cab at each end, the driver walks to the other end, and drives off.

    There are two track arangements, Cross overs (a short X shaped junction between the running tracks to switch trains back to the correct line are used at the end of routes.

    This can be seen at Ealing Broadway, Stratford, Richmond, Wimbledon amongst others (These stations are above ground so the workings are visable)

    In other places where Trains (either Underground or National Rail) continue there is a siding known as a Headshunt between the running tracks, this is used to keep the terminating train out of the way of through trains. The driver walks through the train to the other cab and is switched back to the correct route

    This can be seen at Wembley Park, Amersham, Ranyers Lane, Harrow and Wealdstone amongst others (again above ground examples are used)

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  • 1 decade ago

    Right before (or sometimes after) the last platform, there's a structure like this

    http://hampage.hu/trams/fav4/09200074.jpg

    that lets trains cross over from one track to another. Look close for it as you're coming into the last station.

    The operator changes ends, and waits for a dispatcher to power-throw the switches in the crossover. At that point he gets a signal that says he can proceed. That's how he gets back to the correct side.

    Sometimes they crossover before they come into the station, sometimes after they leave.

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  • 1 decade ago

    The hamburg picture is similar to how it's done in London.

    NB one alternative is to do what the Tyne & Wear Metro do with the South Shields branch, have the last station on a single track section of line and the switch between up & down lines at the next station along.

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  • 1 decade ago

    I know in Chicago towards the last stop, the trains switch tracks....like the tracks make an X. so an incoming train will end up on the outgoing train's tracks at the last stop after that train has left

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  • Anonymous
    1 decade ago

    Imagine that the track is a fork. The train drives up a prong onto the handle, then the driver swaps ends and drives down a different prong.

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  • 1 decade ago

    They dont, the signalman will place them into the terminus platform they will then start back from there and cross over to the down line. Happens so many times a day, quite safe and easy and has been happening since trains began to run.

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