Bumper cars can have two very opposite meanings so it is important to consider the context of the dream and the dreamer's feelings associated with the bumper cars.
Bumper cars could represent fortitude, flexibility, and the ability to quickly recover from hardships and setbacks.
Bumper cars could also mean that you feel your life is going nowhere or that you have been traveling aimlessly without purpose. There also could be a sense of feeling trapped within a game involving competition and butting heads with others.
To dream of a car accident can symbolize your emotional state and is usually associated with being overrun with anxiety, fear or "driving" yourself too hard. This dream may be telling you to slow down before you hit disaster. It is important to rethink or re-plan your course of actions and set yourself on a better path to avoid burn-out.
To dream that you are in a car crash with another car may symbolize that your beliefs, way of life, or goals are conflicting with another's or you are having an inner tug-of-war. It may also represent an experience you have had that was shocking to you and left an impression on you that resulted in changing how you think or feel about the world, where you are headed, or how you approach life.
To dream that you have been rear-ended could mean that something from your past is still impacting you now in some way. You need to learn from the past and acknowledge something that is holding you back in order to move forward.
Bumper Cars
Car Crash