Many tunnels in Sydney, Australia aren't tall enough to permit tractor trailers to move through safely. This animated gif shows a warning system that informs truck drivers when they're about to crash into a tunnel entrance. When sensors detect a vehicle that is too tall, the system pours water across the entrance to the tunnel and projects a stop sign onto that water curtain.
Shaker Hashlan
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05 Jul 20:07
Stop Signs Projected onto Water Curtains
by John Farrier
Saudigeek.net, Mohammed Alnashar and 2 others like this
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