The Most-Used Runaway Truck Ramp in America (And Why It Exists)

On one stretch of Interstate 70 in the Colorado Rockies sits the most heavily used runaway truck ramp in the United States — and the physics behind why it's needed will change how you see every loaded semi on a mountain grade. A fully loaded tractor-trailer weighs around 80,000 pounds. On a five-mile, 7% descent, gravity feeds energy into that weight every second, and the only thing bleeding it off is the brakes. When those brakes overheat, they fade — and once fade starts, it feeds itself until the truck simply won't slow down. This documentary breaks down how brake fade actually works, why professional drivers gear down and snub-brake instead of riding the pedal, how a gravel escape ramp stops a runaway truck, and the real Colorado crash that turned this stretch of road into a national story. This is a documentary about engineering, geography, professional skill, and respect for the people who move freight across America's most demanding mountain roads. Chapters below. If you drive these grades for a living, tell us what people underestimate about them — pinned comment. #trucking #semitruck #runawaytruckramp #brakefade #I70 #colorado #truckdriver #mountaindriving #truckstories #dangerousroads