If a tank vehicle driver must make a quick stop to avoid a crash, what braking technique does the CDL manual recommend?

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

An emergency stop is exactly when panic braking is most tempting, but a loaded tanker is also when panic braking is most dangerous. Controlled or stab braking keeps the wheels rolling and the vehicle stable while still slowing you down as fast as safely possible.