Bumper 
Noticing a bumper in a dream, such as a bumper on a car or truck, indicates either detachment from something or someone you feel is important, or interference with you getting somewhere as in 'bumper to bumper traffic'.
Dreaming of a bumper can also suggest a small mishap that caused you some frustration but in general, a bumper is about interference in your life.
Janitor
To dream of an idle janitor implies drawbacks in your business dealings.
To see a busy janitor means good news in the future.
Trailer
To dream of a trailer means that you feel tired and burned-out attending to your duties and responsibilities. You carry more weight than you need to. This dream is indicative of the subtle fact that you are more of a follower than a leader.
Vehicle
To ride in a vehicle in a dream represents your life's speed and direction. Refer to particular vehicles for more detail.
The driver of a vehicle in a dream represents the person, or the aspect of yourself, or a part of your life, which is in control of your life's path. For example, to dream that your boss is driving you around indicates that your work has become the main factor in your life decisions.
To dream of falling from a vehicle indicates that you feel out of control.
To dream of crashing a vehicle represents a self-destructive action.
Junkyard
To dream that you are in a junkyard symbolizes repressed panic, frustration, and rage. Dreaming of a junkyard may also represent your attitudes, old habits, and former notions which you have already pushed aside.
Gardening
To dream of yourself gardening indicates a time of positive and grounded action from which good things will occur. To be pruning back overgrown bushes may indicate the introduction of a new family member. To be planting small plants or seeds is a great sign of a comfortable and fruitful future
Automobile
To dream that you are traveling in an automobile means that even when things are going well, you won't always be comfortable.
To dream about nearly being hit by a car signals that you can best your competitors.