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.
Car
Dreaming of a car is often a representative of personal aspects and characteristics.
It can also represent spiritual direction and presence of strong motivation. For example, to dream about driving a car indicates your will to succeed, your determination, and your talents for moving from one aspect of your life to a different one. Try to recall how bumpy or comfortable the ride in this car was. It also depends whether you are the driver or just along for the ride. This will represent your role in life as either a participant or an observer. If you are in the backseat, this represents your low self-image and that you are allowing those around you to take control of your direction. You need to evaluate your self-esteem issues. This dream represents the level at which you are dependent upon others and the amount of direction you maintain within your own life.
If you dream about being in a car crash, it indicates worry about failing something, while a crashed car catching a fire denotes new pressure and anxiety.
If you're in a car being driven recklessly whether you are the driver or passenger, it indicates a lack of responsibility or afraid of engaging on something.
To dream that your car is stolen suggests that your personality is being taken away from you. This could be related to a loss of employment, relationship, or another circumstance in which your sense of self plays a role. If your car is overheating, you may be spending too much effort and should take it easy or risk burning out. You could be accepting too much responsibility and this will lend itself to destruction.
To dream about being in a parked car represents that you should focus your energies on some other aspect of your life. Your current situation may be fruitless. Also, a parked car may indicate that you should slow down and take a moment to savor life. If you cannot find your parked car, then this suggests that you are lost in life and need to find direction.
To dream of going reverse indicates a development of falling back into old habits and behavior, or turnaround of a decision.
To dream that you are nearly hit by a car represents that your ambitions in life may not be in line with others' ambitions. You could have also experienced a wounded ego or traumatic situation.
Van
To dream of a van implies an unconscious desire to either move to a new house or at least do a major cleaning of your current home.
The suggestion here is to be ruthless and release yourself from the clutter and unnecessary debris that has accumulated, particularly in your bathroom and bedroom. There is also an indication of making room in your house for something new.
Tires
To dream about tires indicates that you are hung-up on previous events and need to look in a forward direction. It also references your mental well-being and how you deal with various events.
To dream about a flat tire mean that you are exhausted. The fatigue is slowing you down and preventing you from reaching your goals.
Truck
To dream of a truck denotes that you are overworked. You may be asking for too many responsibilities. On a related matter, pregnant women are reported to dream of trucks or driving trucks often. This may represent the load they are carrying in their wombs, or their changing physical appearance.
Landau
To dream that you are riding in a landau indicates that you will meet a fun, cheerful person who will bring joy and pleasure in your life.
To see an overturned landau in your dream indicates sudden halt to the favorable events in your waking life.
Subway
To dream that you are in the subway implies that you are attaining your objectives without having to use much physical effort. You are discovering your inner spirituality and personality. It may also mean that you are being too impulsive and you should think carefully before making a decision.
Tunnel
To dream of a tunnel represents the main female reproductive organ, the womb, and giving birth. Hence, it may indicate your need for protection and nurturing.
To dream that you are going through a tunnel suggests that you are discovering parts of your unconscious. You are in the process of gaining understanding and enlightenment. Alternatively, it may indicate your myopic nature.
To see light at the end of the tunnel symbolizes hope and a brighter future.
Airbag
Dreaming about an air bag symbolizes the presence of protection and safety at the moment in your waking life.
Alternatively, if you dream about seeing the airbag deploy in a vehicle, it is a sign of warning that you're about to get hit with a major setback if you continue the current pace in your life.
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.
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.