Day 27

Breakaway sign posts

April 22nd, 2010

In case a car runs off the road into this sign, these posts will cleanly snap off at ground level, reducing the damage to the vehicle.


  1. Jason Eppink says:

    Brilliant! (I assume they can still withstand strong winds?)

  2. Matt Green says:

    Yes sir. Here’s a decent guide to sign supports:

  3. Dave says:

    And that rock-shaped object expands into a giant airbag, I bet? Please. What are you, a retired transportation engineer?

  4. Thomas says:

    They’ve had this in Texas from way back. Part of it is not saving the car so much (just a pleasant by-product) as allowing them to reinstall the next sign with much less time/effort/expense.

  5. TOM F. says:

    I’ll have to let Matt speak to his “retirement” status, but I can tell you he is indeed a very talented transportation engineer – we miss him in the office.

  6. Kristina Palmer says:

    We definitely don’t have those in Alabama, or atleast not that I have seen. There are plenty of dead signs around here. Then again I wonder if they chose not to have them here because we have a lot of Tornados and straight line winds. Flying sharp signs would not be good.

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