How should you plan to park a commercial vehicle whenever possible?
Correct answer: B – Park so you can pull forward when leaving
Because a driver cannot see everything behind a commercial vehicle, backing is always hazardous and should be avoided when possible. Park in a position that allows you to leave by moving forward. If backing cannot be avoided, check the path, use both mirrors, move slowly, and use a helper when available.
Source: Pennsylvania Commercial Driver’s Manual (Pub. 223) — § 2.2.4, “Backing Safely”


