On a steep downgrade with doubles, you should:
Correct. Same rule as any combination vehicle, but plan extra margin: doubles take longer to stop and the rear trailer may push.
CDL Practice Question #377
Category: Doubles/Triples
Why this question matters
This question is one of 50 in our Doubles/Triples bank. The reasoning above comes directly from the AAMVA CDL Manual, the source document used by every U.S. state DMV. Memorizing the underlying rule — not just the letter answer — is what separates passing on the first attempt from a return trip and another fee.