This is rather impressive. Volvo’s “Stretch Brake” technology prevent a big rig truck from jackknifing on a downhill slope by automatically slowing down the trailer when the driver’s foot releases the gas pedal.

In the video above, you see first how a truck without this technology might handle a slippery road. And then starting at the 3 minute mark, you see the major difference in handling when Volvo’s “Stretch Brake” is applied.

One more video demo inside.