Laser Water Curtain Stop Sign – They do things differently in Sydney

From The Atlantic: "Engineers in Sydney came up with an awesome solution [for the problem of trucks smashing into a tunnel]. If a truck going into this Sydney tunnel makes it past the warning signs, hanging weights, and flashing lights, traffic engineers deploy a laser-powered water curtain stop sign. It's a big investment, but the engineers say it's nothing compared to fixing the cost of a collapsed tunnel entrance. Plus, it looks downright futuristic."

[via Jim Duncan]