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View Diary: Traffic Cameras: Don't watch me, bro! (97 comments)

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  •  Inductive loops (3+ / 0-)
    Recommended by:
    peptabysmal, lgmcp, JeffW

    Wouldn't detect a bike or a moped, and might be able to pick up a motorcycle.  They just don't have enough metal to trigger a positive. One of my professors recommended sticking a strong magnet to the bottom of a moped/motorcycle, if you didn't want to just walk to the curb to hit the pedestrian button. :P

    "He who fights monsters should see to it that he himself does not become a monster. And if you gaze for long into an abyss, the abyss gazes also into you."

    by Hayate Yagami on Fri Nov 22, 2013 at 11:16:32 AM PST

    [ Parent ]

    •  They can adjusted to register a bicycle (3+ / 0-)
      Recommended by:
      lgmcp, Mid10Dem, Simplify

      if the bike is steel. Sometimes you have to make a request to the city to increase the sensitivity of the sensor. Also, if you have your bike positioned to one side instead of right in the middle it works better.

      •  It can be oversensitive... (2+ / 0-)
        Recommended by:
        JeffW, AoT

        ..however, when adjusted to detect bicycles, and receive 'false calls' which will unnecessarily switch the signal to provide green to an empty approach.

        Isn't it discouraging to think how many people are shocked by honesty and how few by deceit? (Noel Coward)

        by Mid10Dem on Fri Nov 22, 2013 at 02:59:06 PM PST

        [ Parent ]

    •  Vehicle detectors (0+ / 0-)

      The loop is part of a tuned circuit.  The loop is a coil.  When you put a piece of iron in the coil the inductance changes.  this causes a frequency change which triggers a count.

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