According to the CDL manual, tests have shown that loaded tankers can roll over under which of the following conditions?

AAMVA CDL Manual, Section 8.2.1 (High Center of Gravity), p. 8-8-1

This is a critical safety fact because it contradicts the common assumption that obeying the posted speed limit is always safe. For a tank vehicle, the posted curve speed can itself be too fast, so drivers must deliberately slow down further than they would in a car or dry van.