If you've ever driven in the mountains you've seen those runaway truck ramps every few miles. They're made of sand or gravel and they help a truck slow down and stop in case of brake failure. Here's one in action.
A semi on a highway in Colorado has smoke coming out of its wheels. It drives up one of those ramps, and you realize how important they are because of how long it takes for the truck to stop.
Occurred on April 26, 2019 / Silverthorne, Colorado, USA "Friday, April 26 2019, Jesse Terrell was driving westbound on I-70 towards Silverthorne. He saw smoke coming from this semi and knew its brakes were burning up. Due to the fact that between 24-36 hours before a similar occurrence had happened going east bound on I-70, Jesse picked up his phone to make the recording.