Speed Kidney: The Ultimate in Traffic Calming Devices?

I first wrote about the concept of the Speed Kidney in 2012.  Basically, it’s three speed humps that are parallel to the traveled way that are curved as a chicane per the diagram.  This doesn’t necessarily reduce the average speed very much, but they reduce the number of vehicles driving significantly faster than the design speed.  I like the idea of getting rid of the outlier speeders and clustering traffic at the posted speed limit.

Professor Garcia recently put together a ten minute video that updates the research and covers the results from live installations.  I encourage you to check it out.  I’d really like to see more Speed Kidney’s installed.  Please let me know if you know of any installations outside of Spain.

Please note: I reserve the right to delete comments that are offensive or off-topic.

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3 thoughts on “Speed Kidney: The Ultimate in Traffic Calming Devices?

  1. Mike, in your 2012 article you mentioned the possible challenge of using a speed kidney in a colder area that snowplows have to clear. Have you any further thoughts on how that aspect could be worked out?

  2. Plowing: It will be a challenge, but most public works departments in Minnesota have smaller gear (pick up trucks with plows, bobcats, etc) to plow out bumpout parking areas, sidewalks, and other tight spots that a full size plow truck can’t handle. Plowing the speed kidney would obviously be more time consuming than plowing a straight segment of road, but I don’t think it’s a deal breaker. Mike

  3. Very interesting, thanks for updating. I wonder if the patent mentioned at the end is filed internationally as well, that would stifle use of it quickly.