What is the purpose of a highway escape ramp (runaway truck ramp), and what should a driver do upon recognizing brake fade while descending a grade?

General Knowledge • Free CDL Practice Question
Regulation

AAMVA CDL Manual (nhcdm.pdf) Section 2.16.4, pp.2-32 to 2-33; tested per 49 CFR 383.111(a)(19)

Why This Matters

Riding the service brakes on a long, steep downgrade until they fade or fail, rather than relying on a low gear chosen before the descent, is how runaway-truck situations develop. Knowing that escape ramps exist specifically to stop a runaway vehicle safely, and planning for their locations in advance, can be the difference between a damaged truck and a serious crash.