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The longest bridge in the world with a span of 164.8 kilometers in length, the Danyang-Kunshan Grand Bridge is a viaduct on the Beijing-Shanghai High-Speed Railway. It runs along the rail line between Shanghai and Nanjing in the Jiangsu province, on the Yangtze River Delta. There is a 9 km section above over water across Yangcheng Lake. Passing across rivers, lakes, and population centers, how long will the longest bridge in the world last in a life after people?


Timeline[]

1 Day After People[]

With mankind gone, no cars drive across the bridge anymore, except for the many cars left on the bridge as man disappeared. This bridge spans across water and land all the way from Danyang to Kunshan, although just part of the longer highway between Shanghai and Nanjing.

1 Year After People[]

The bridge span across the water is not faring as well as the supports on land, but are still relatively fine. As the water crashes on to the concrete beams, they will slowly crumble the beams. On land, something else will try and take down the bridge. Vines and plants nearby start to grow on the bridge, slowly reaching the road above. The cars themselves haven't changed much but have started to rust, some faster than others.

20 Years After People[]

The growing plants are breaking apart the road bit by bit. The cars on top are rusting away, while the bridge itself is still able to hold itself together. The parts on land are showing a better chance of survival than those on water.

75 Years After People[]

The cars have vanished, collapsing into rusting heaps of metal before being swallowed up by the plants. The slow erosion of the concrete below the waves has started to weaken the support beams. As for the cables on top, they are now struggling to hang on and will soon start to snap.

100 Years After People[]

D-K GB Map

Map of the Danyang-Kunshan Grand Bridge.

D-K GB 100 Years

Part of longest bridge

Maxresdefault (bridge)
, 100 years after people.

The first spans of the bridge above water have started to fall apart. Some fall into the lake, while others fall on another part of the bridge, bringing those parts as well. The cables that held up the road now snap, causing more to collapse into the waves. Some of the road spans still hold on, but will continue to fall apart in the coming years. On land, the bridge is struggling to hang on as well. The growing plants have done significant damage to the road, and the concrete bridge has started to crack. Plant life isn't the only problem the bridge faces. A magnitude 6.2 earthquake strikes China, causing some parts of the bridge on land to crumble and collapse. The longest bridge in the world is in dire condition.

150 Years After People[]

Above the waves, the last of the spans have fallen into the water, leaving only the concrete beams and the taller towers that once held the cables. On land, the cracks have grown to be too much for the bridge to handle, causing more spans to fall apart. Most of the 164.8 kilometers of bridge that made up the Danyang-Kushan Grand Bridge have now fallen, leaving only a few spans, concrete support beams and the towers above the water.

200 Years After People[]

The last of the spans have fallen at this point on land, and many concrete beams have started to crack enough to break apart. Only the towers above the water are left of what was once the longest bridge in the world.

250 Years After People[]

Some concrete beams are still holding on, not just on land but on water as well. However, the towers have worn away enough that they start to collapse. They tilt towards the water and soon fall into it, the final noticeable remains of the bridge above water gone for good.

350 Years After People[]

The final concrete beams of the bridge on land now fall apart, eradicating the last pieces of evidence that the longest bridge on Earth had ever existed.


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