You have to be sure that a bridge is going to hold up to daily traffic before it can be officially opened, yet Chinese engineers have come up with a fascinating way to trial the Huajiang Grand Canyon Bridge before it becomes available to the public.
You'd be lying if you said you had never worried about a bridge collapsing while driving over one, yet thousands of hours of engineering goes into the design, construction, and testing processes that lead to each and every one.
Things certainly start to ramp up when you start working on the world's tallest bridge though, and that's what the Chinese engineers have dealing with since construction started on the Huajiang Grand Canyon Bridge in Guizhou Province in 2022.
Construction was officially completed in April 2025, and it was officially registered as the world's highest measuring 625 meters (2,051 feet) between the deck and the bottom of the famous gorge that lies underneath — referred to often as the 'Earth crack'.
It spans 2,890 meters (9,480 feet) in total from end to end, and is supported by two towers that stretch an additional 262 meters (860 feet) into the air.
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Understandably, making sure that this is ready to actually support all of the traffic that will inevitably pass across the 1.8 miles suspended above the gorge every day is of the upmost importance, and a bizarre experiment was carried out to make sure it could sustain the weight.
As reported by the BBC, a total of 96 trucks were driven out onto the bridge across a number of designated testing points by a specific team, and this helped ensure that it was secure across all areas before it was officially considered safe.
"We simulate extreme conditions with 3,360 tons of load to activate the maximum capacity of the bridge structure under normal use," explained load test director Lei Min while standing on the bridge alongside the heavy trucks.
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It might look like the world's most organized traffic jam, but it's a vital step to securely test the safety of the bridge, and plans couldn't have gone ahead without it.
"Assuming they're chilling in the trucks, being the first driver would be the most nerve racking I'd think," speculated one commenter on Reddit. "Sitting there while all the other trucks pile on, anticipating it to collapse. The last truck driver would have less time to think about it."
You'd have to have a lot of confidence in the construction to drive onto the bridge first, but it passed with flying colors and represents a fantastic project that was completed without any issues.