10 Responses to “How do shopping trolleys grind to a halt when they cross the red line?”

  1. Cocoa Flavoured Girl says:

    I KNOW!!! i have always wondered about that, maybe it’s an electric current in the air? or a signal that is transmitted, maybe similar to an invisible dog fence? I’m way too embarrassed to actually try it and see… :-P
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  2. kelly_marie_13 says:

    Ha. You’re one Kool kidd.

    Well i’ve always wondered.

    It’s magic i guess.

    I’ll have a look later and see what others have wrote ; )
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  3. gavmel259 says:

    There is a magnetic barrier placed around the perimeter of a supermarket. When a trolley is pulled over one of these lines, it activates a locking device in the trolley’s wheels.
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  4. A-man says:

    iv stole a trolly before put a friend in to it and shoved him in to a river there is a lock that is activated by a magnet and under the red strip on the ground the is another magnet and when it crosses the lock shuts over and lock but if u smash that thinwheel on the trolly open and take the battery out it wont lock.
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  5. shrek69 says:

    a magnet buried in ground activates the brakes on trolly
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  6. kew says:

    it doesnt work. ive tried it at asda and the trolley just kept going. i think the plan is to work on our brainwashed state of mind . there are so many signs/ rules/ dont do this and thats, that *they* think we will stop at the line. try it. nothing happens and the world doesnt end.
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  7. Eline Z says:

    The red line activates the brakes on the trolley which blocks the weels so you could take it but you would have to carry it because it won’t ride anymore ;)
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  8. Roy < says:

    What do you mean steal a trolley …. I paid £1 for mine!!!

    "The introduction of a hi-tech preventative measure aims to reduce the problem and Sainsbury’s has committed to installing a new electronic security system which will prevent people from taking the trolleys off site.

    The system works on a radio signal transmitted from within the Horsham store via a sunken wire which will surround the car park and be marked by a highly visible red line.

    All trolleys will be fitted with a device within the wheels and if trolleys are pushed over the wire, a brake comes on and the trolley can no longer be easily pushed.

    The brake is de-activated and the trolley can be wheeled once it is pushed back inside the car park boundary."

    References :
    http://www.horsham.gov.uk/your_area/News/news_7731.asp

  9. John P says:

    Stand-alone, proprietary RF sensor network system that is modular, scalable, and easily deployed to deliver multiple solutions
    References :
    http://carttronics.com/RSNhome/RSNhome.html

  10. Kate ? says:

    It doesnt work
    I tried plenty of times just to see what happens
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