A major symbolic analogy of mankind is the carriage in relation to humans. The driver is the Self in Jungian psychology; the carriage, the body and mind; horses are the vital forces; and the reins, intelligence and will. In this sense, the overall meaning of the dream is the same as in CAR. On the other hand, a carriage represents slow but safe progress. If you are surrounded by pioneers it may suggest the desire to explore your unconscious or to adopt a more exciting lifestyle. If you drive someone else's car, it portends poverty. But if it is yours, you will be rich.
One of the reasons why people always get involved in road accidents is that, they are tired while driving, or that they lack sleep. Many people do not realize that their performance can be highly affected by having not enough sleep. Sleep deprivation can affect reaction as well as decision making, not to mention that it could make a person unable to drive well. It goes the same with drunk driving.
Types of sleep
There are two types of sleep that most of the humans undergo - REM and NREM. REM refers to the Rapid Eye Movement and NREM refers to Non-Rapid Eye Movement. Every individual will alternate these two types of sleep. Non-REM sleep will occur for a short period of time in the first stage of your sleep followed by the REM sleep. Dreams occur during the REM stage, where it lasts for 20 minutes. According to a researcher, J. Allan Hobson, dreams that occur in REM stage are usually forgotten when the individual wakes up. Studies conducted on patients during sleep shows that the frontal lobes in the brain, that are responsible for storing information, are inactive during the REM stage, which is the main cause for forgetting the dreams. Studies also show that this is the stage where you have the most intense dreams.