Vehicle Detection for Bikes at Signalized Intersections

Cycling around the older neighborhoods of Mobile is relatively easy because the area is set up on a gridded street system making for multiple ways to get somewhere.   But this also means there are many intersections to get through and some of them have stoplights.  Most of the stoplights have a vehicle detection system embedded in the roadway to detect when a vehicle is waiting to pass.  Most of these systems that are in use today are based on magnetism, though some newer methods incorporate cameras.  When one of these magnetic detection devices is tuned properly it should be able to detect bicycles made of steel and aluminum.  I don’t know if aluminum gets picked up and I’m pretty sure carbon fiber does not.  But a good old steel bike works at many intersections but you just need to know how to use them.  Aluminum and steel rims on a bike should get picked up by a well tuned device if those rims are sitting right on top of the detectors.  Here’s a picture of my front tire riding on top of one of the lines in the road that are from a detector.  It’s important for a bike (since it’s small) to be right on top of these lines.  Go ahead and try it out.  It will make getting around more convenient and faster.

Lines marking vehicle detection equipment at the intersection of Canal and Broad St. This one works very well for bikes

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2 responses to this post.

  1. Posted by rudy smith on November 25, 2011 at 11:19 am

    ATTACH A SMALL ROUND MAGNET TO THE INSIDE OF YOUR PEDAL ON EACH SIDE OF THE CRANK – PROBLEMO SOLVED.

    Reply

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