Views : 811,283
Genre: Education
Date of upload: Jul 18, 2023 ^^
Rating : 4.936 (511/31,375 LTDR)
RYD date created : 2024-05-06T21:15:17.414028Z
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Top Comments of this video!! :3
I live just outside Philly. There's one reason that the gridlock didn't occur that isn't getting much coverage. Real-time traffic routing. Turn by turn directions from phones and GPS didn't just blindly offer official detours. They adapted to real traffic in near real time. This let the flow spread out to minimize resistance like water through a maze. Traffic could utilize the entire regional road system to re-levelize.
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The same happened in Germany on September 17th, 2020 on the A40 Autobahn.
A tanker truck burns out under a bridge.
The bridge was then demolished and rebuild.
And that in the most populous area with the highest traffic volume. A main railway line runs over the bridge and also had to be closed.
The replacement buses for the trains had to drive under the bridge.
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Exact same thing happened in Yonkers, NY in 1997. There was a turning lane that looped back under the underpass for I-87 which had been known to be dangerous and a serious risk for decades, but had been left once it was built. One day a tanker truck made the turn and was hit by a car coming down the road that formed the underpass. The truck sprung a leak which quickly turned into a fire, and it destroyed the overpass for I-87. It ended up taking about 5 months to rebuild in an emergency contract, and that turning lane was removed, as there was another not a block away controlled by a light already.
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A classic instance of a fire on a bridge was Robert Stephenson's historic Britannia Bridge across the Menai Straits from Wales to Anglesey. Finished in 1850, it had twin wrought-iron box girders through which the trains ran. Part of the corrosion proofing was by tarred hessian (we'd never use that today, but it lasted 120 years). 120 years later, it caught fire (kids probably playing with matches). Though the tubes survived, the fire destressed them and impaired their load-carrying ability. The tubes have been replaced with a double deck on steel arches using the original piers and abutments.
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@PracticalEngineeringChannel
9 months ago
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