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A comment on Emergency stop signs projected onto waterfalls at road tunnel entrances. Parent comment

Re:Emergency stop signs projected onto waterfalls at road tu... by loco5niner on Friday May 03, 2019 @05:17PM (#19822371)
Seems like a simple solution. Split the beam in the middle with hinges on left and right. Allow left and right beams to travel a bit but not too far.
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