When using the controlled braking method to make an emergency stop, what should the driver do?

49 CFR 383.111(a)(14); AAMVA CDL Manual (nhcdm.pdf) Section 2.17.2, p. 2-34

Controlled braking lets a driver stop as quickly as possible while still being able to steer if something unexpected happens, like another hazard appearing mid-stop. Locking the wheels instead removes steering control entirely, right when it may be needed most.