• Video
  • Aug 20th 2012 at 12:32PM
  • 40
Everyone knows that highway signs aren't supposed to bounce like they just remembered the lyrics to "Jump Around" by House of Pain. But this particular sign across a highway in Calgary, Alberta, Canada doesn't care about your so-called common knowledge.

A storm that brought some serious wind sent this crossbar into gyrations so severe that cars began changing lanes to get out of the way. And if you watch all the way to the end of the short video, you'll see they had good reason.

Scroll down to watch the scary stuff.



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    • 1 Second Ago
  • 40 Comments
      BipDBo
      • 2 Years Ago
      We have obtained harmonic resonance! Anyone else remembering the Tacoma Narrows bridge? On aside note, a while ago, there was an AB post with video about the catastophic failure of the driveshft on a V6 Mustang racing at very high speeds obtained with engine modifications and the disabling of the speed governor. I'd bet that harmonic resonance was the core cause of the failure, and that the governor was set by Ford to prevent such resonance.
        NightFlight
        • 2 Years Ago
        @BipDBo
        That's what I came in here to say. Nice.
        EXP Jawa
        • 2 Years Ago
        @BipDBo
        The now out-of-production Ranger was speed capped at ~93 mph for the same reason. Driveshaft resonance created a wicked vibration at that speed, becoming something of a high-speed jump rope.
        k_m94
        • 2 Years Ago
        @BipDBo
        Why bother giving the Mustang V6 such damn good engine output and overall performance (for the money) if they give it a harmonically unstable driveshaft (obviously untested at speed) in the sake of getting over 30 mpg highway? Thus giving them no choice but to limit a car capable of 140+mph to something as laughable as 113.
          EXP Jawa
          • 2 Years Ago
          @k_m94
          What's the point, really? Just look at it from the manufacturer's point of view, considering the target market. Who buys a V6 Mustang for it's top speed performance? Or, who buys a V6 Mustang for track days? Just how many V6 Mustang buyers are out on the salt flats? Most folks that buy the Mustang for performance rather than image buy the GT (or above). Since essentially no one buying this car can (or will, anyway) make use of a 140 mpg top speed, why would Ford need to give the car that ability? If, on the other hand, they cap to a speed that anyone would reasonably consider just fine, thank you very much - like 113 mph, they can reduce the mass and inertia of something like the prop shaft. That helps to contribute to the fuel economy claims.
          Drakkon
          • 2 Years Ago
          @k_m94
          You can also use lower speed rated tires which are almost always cheaper than the high speed rated ones.
      Jonathan
      • 2 Years Ago
      Looks like one of those old cartoons where everything is dancing all the time.
      Dark Gnat
      • 2 Years Ago
      "Gee, that sign looks like it may collapse at any moment, what should we do? Drive right under it, of course!"
      jonnybimmer
      • 2 Years Ago
      I like how everyone crawls towards it like they're trying to time it just right to go under. Of course it ends up being the car that's recording that (almost) loses.
      Unknown
      • 2 Years Ago
      NOM! NOM! NOM!
      Drakkon
      • 2 Years Ago
      It makes me think of two things. It resembles the poorly animated 'bugs' in the original Tron movie. Or it should be set to music with Mickey Mouse wearing a magician hat.
      Zoom
      • 2 Years Ago
      I love how everyone kept driving under it, knowing something was wrong and could malfunction at any moment. Kind of like Climate Change. We're all frogs sitting in a pot of water slowly warming up to a boil, going about our normal routines aware that something is going to give but doing nothing about it.
        IBx27
        • 2 Years Ago
        @Zoom
        Care to explain what we can do about the sun warming the earth, as it does in every 10 year cycle? We're in global cooling right now, and that's why they changed the term to 'climate change.' Unless you're so arrogant that you think you can tell the sun what and what not to do.
          bjzq8
          • 2 Years Ago
          @IBx27
          "Care to explain what we can do about the sun warming the earth, as it does in every 10 year cycle" We can ban anything burning fossil fuels, and revert to iron-age hunter-gatherer societies. Think of the family togetherness we'll legislate!
          creamwobbly
          • 2 Years Ago
          @IBx27
          The earth is warming, year on year, due to man-made greenhouse gases. That fact has not changed (and where you get the impression that it's cooling is beyond science). The term "climate change" reflects the fact that the changes are not just restricted to warming; and that some regions may experience cooling -- such as the Sonora Desert where increased rainfall appears to be helping to trend temperatures downward. But overall, the average global temperature has increased -- not by much, but look at the changes to different climates (no really -- look without religio-political prejudice next time), and you can see that it doesn't *take* much to change a region forever.
      Ducman69
      • 2 Years Ago
      Or you could, I dunno, not drive in that weather.
        NightFlight
        • 2 Years Ago
        @Ducman69
        Not drive in rain and wind? Seattle's population wouldn't be able to go anywhere for 300 days out of the year....
        th0mb0ne
        • 2 Years Ago
        @Ducman69
        I live in Calgary, and the weather here can turn on a dime in 5 minutes. It's not like the weather was this bad for the whole day, so you could avoid it. This was basically during the rush hour commute home.....it wasn't even that terrible, just windy. We're not talking hurricane here.
        joejoe509
        • 2 Years Ago
        @Ducman69
        Riiight... It wasn't a hurricane or a tornado. The sign is the problem, not the weather. If the cars were being blown off the road or if there was sideways rain I might agree.
      Amco
      • 2 Years Ago
      The SIGN heard the AWESOME PUN-JAB-BEEEEEEEE music and started to bust a move! PUN PUN PUN JAB BEEEEEEEEE
      • 2 Years Ago
      [blocked]
        Bill
        • 2 Years Ago
        Me too. Sign coming down could easily have decapitated your, or just truncated your whole body.
      joejoe509
      • 2 Years Ago
      Oh man... that's scary as hell. I think I would have drove as fast as I could under it and try to go one of outside lanes or even the shoulder. This thing is more likely to break in the middle than the outside. Canada, I hope the building codes have changed in light of this and you're currently performing a review of all existing light posts.
      Ask
      • 2 Years Ago
      This guy missed his "final destination", maybe next time...
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