Because of a tank vehicle's high center of gravity and the movement of liquid inside a partially filled tank, how should a driver handle starting, slowing, stopping, and turning?

49 CFR 383.119(i) (operating practices and procedures not otherwise specified — the knowledge-test topic category this rule falls under, not itself a self-executing rule); AAMVA CDL Manual Section 8.3.1, p.8-8-2 ("Because of the high center of gravity and

A tank vehicle's high center of gravity combined with liquid surge makes it far easier to roll over than a vehicle hauling a solid, fixed load. Smooth, gradual driving inputs give the liquid time to settle instead of slamming against the tank walls, which is one of the simplest and most effective ways a driver can prevent a rollover or loss of control.