CH4 - Pile Up: World's Biggest Crash Test (2025)

In an audacious experiment, members of the public unwittingly take part in a test that sets drivers and vehicles on course for an inevitable pile-up at motorway speeds. Thanks to cutting edge engineering, no one is ever in danger and no one gets hurt. Can crash test investigators figure out the way the crash unfolded, and what can be learned about car safety from the results.