When making a lane change in a doubles rig, you should:
Correct. Early signal, mirror check, gradual lane change. Quick lane changes amplify into the rear trailer.
CDL Practice Question #387
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.