Freudian: An emblem of the male penis, primarily when combined with tunnel imagery.
Similar to other vehicles in terms of movement and transitions (see Bus, Car, Horse).
Each car of the train may represent aspects of yourself, including hidden talents, knowledge, fears, hopes, and memories. So, exploring the train symbolizes introspection and integration of some of these portions.
For example, searching the caboose may symbolize routing out your feelings about death or endings.
What Does Train Mean In Dream?