1. A continuing high state of anxiety, alarm (especially if the truck fails to reach its destination). 2. Good fortune comes after scary times. 3. May be guilty of unpleasant behavior (especially if riding the truck).
The engine symbolizes the dreamer’s wish to demonstrate power. If the dreamer is the engineer this shows motivation for aggressiveness in occupational duties. The engineer actually driving the engine (motor) reveals an emotional urge to impress another person, either male or female.