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does flashing traffic lights work?

Discussion in 'Motors' started by rotters, 24 Feb 2006.

  1. rotters


    Joined: 14 Nov 2004

    Posts: 5,387

    Location: Hayle, Cornwall

    just driven home from work and noticed a fellow in front of me flashing the traffic lights and they seemed to change, dont know if its coincidence or just their timing. so any proof this works or anyone out there to dispell this evil rumour?

  2. moss


    Joined: 1 Nov 2002

    Posts: 6,487

    Location: South Shields

    Ive heard it worked with temp traffic lights, not sure how true it is. I once saw an unmarked cop car do it and they did change though.
  3. willd58


    Joined: 25 May 2004

    Posts: 5,797

    Location: Bristol England

    It works on some temporary ones, im not sure about anything else.
  4. Domo


    Joined: 11 Feb 2004

    Posts: 4,522

    Location: Surrey, UK

    I don't think so - the sensor detects your car and not your lights.
  5. great advice


    Joined: 20 Oct 2003

    Posts: 2,872

    Location: Manchester

    It does it by detecting the heat off your engine, if it doesnt pick up on it flashing your lights can work. Never seen it done myself but read about it on passionford.com Its only the temp ones IIRC. There;s another way of them doing it too, they have wires going across the road and it picks up when you drive over them. the same cables are also used to log traffic flow data before they errect permanent lights so they can get the timings corrent without having to go through a trial and error process.
  6. Clarkey


    Joined: 18 Oct 2002

    Posts: 18,182

    they use IR sensors, so yes its possible giving it some main beam action could trigger it.
  7. pinkaardvark


    Joined: 18 Oct 2002

    Posts: 6,705

    Location: Cambs

    This used to work for me on some fixed site ones, not tried it in a long time though. The engine heat thing doesn't make sense though as the system was designed to make light switching faster at night when traffic was reduced ie to prevent you sitting on red when there's noone coming the other way. But the sensors were only ever fitted to selected sites so it doesn't work for all of them.
  8. bingham67


    Joined: 29 May 2005

    Posts: 6,747

    Location: Hertfordshire

    I find positive thought works better stay green stay green :D

    But ive never tried flashing traffic lights to be honest one to try though :D
  9. MrSix


    Joined: 21 Oct 2004

    Posts: 6,147

    Location: Los Angeles

    I'm gonna try this on my way to sixth form this morning - might even film it...await results :p
  10. Mat


    Joined: 18 Oct 2002

    Posts: 13,928

    I find patience works. They all change every time ;)
  11. Melon


    Joined: 19 Nov 2005

    Posts: 68

    Location: Newcastle Under Lyme

    Traffic lights do change when you flash them but not all of them work. It depends if the traffic lights change as the see on coming traffic or if they are just on a timed sequence. I know quite a few of the traffic lights in my local area that do change when I flash them.
  12. Draeger


    Joined: 4 Feb 2004

    Posts: 12,887

    Location: Falkirk, Scotland

    I always find applying the handbrake usually does the trick.

    As soon as you have done that and put the car into neutral, the lights seem to change. :p
  13. Big Spender

    Wise Guy

    Joined: 31 Oct 2004

    Posts: 2,317

    it works on a few permanent ones for me
  14. agw_01


    Joined: 11 Apr 2004

    Posts: 19,681

    While playing with a Fiesta a year ago, we got up to some temporary traffic lights which were on red.

    I noticed that he flashed his lights a few times, and low and behold the lights changed.

    Made me grin a little.
  15. Oracle


    Joined: 17 Jan 2006

    Posts: 1,971

    Location: Haskins

    The number of traffic lights that still operate this system are reducing greatly in the UK. They used to have Passive IR sensors on top of the light which would detect a car(s) as they approached. Others (in built up areas) are purely time based and alter according to rush hour traffic on a specific program, and then there are the ones that sense a car as they roll over a pressure grid in the road just before the lights (rectangular in shape).

    For the IR ones to work with mad flashing, this can only be done at night time.
  16. bramski


    Joined: 16 Jul 2005

    Posts: 351

    Location: Glasgow

    It only works on traffic lights with the grey sensor boxes on top of them.
  17. TomWilko


    Joined: 3 Jun 2003

    Posts: 4,090

    Location: UK

    Works for me on several in Nottingham, particularly Wollaton/Bramcote/Beeston/Strelley/Hucknall end.