A tank vehicle driver sees an obstacle in the road and needs to slow down quickly while also steering around it. What does CDL guidance say about this situation?

49 CFR 383.119(a)-(b); AAMVA CDL Manual §8.3.2, p.8-8-2 (cross-ref §2.17.2)

Real emergencies often tempt a driver to do everything at once: brake hard and swerve. In a tanker, that combination is one of the most common ways a rollover actually happens, so knowing to use controlled or stab braking instead of a hard brake-and-swerve can be the difference between a close call and a crash.