May 17


Check out the the 10 News from Sydney, Australia.  The road authority has a series of warning signs before the entrance to the harbor tunnel and the video shows the last warning sign (at 35 seconds in) – a water curtain with a projection of a stop sign in it.  Very cool!

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    Mike Spack

    My mission is to help traffic engineers, transportation planners, and other transportation professionals improve our world.

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