Thread: What are these sprouting up on Highways?
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Old 07-12-2009, 12:02 PM   #4
Anchor
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Join Date: Sep 2008
Location: Sydney, NSW, Australia
Posts: 2,280
Default Re: What are these sprouting up on Highways?
Solar powered devices <- certain

Radar <- Probable

Something else like radioactivity/RFID/etc detector <- less probable

A..
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