To dream of a car horn represents situations where you or someone else feels the need to draw attention to interference with a decision-making. Signalling to others that you don’t like them being in your way as you try to navigate a situation. Signalling annoyance that someone is in your way of controlling a situation. Expressing anger or assertively signalling the need to be respected while being in control of a situation.
To dream of a bicycle horn represents situations where you or someone else feels to the need to draw attention to interference with independently balancing a situation. Attempting to fix a situation all on your own and signalling to others that you are feel annoyed that they are in your way. Expressing anger or assertively signalling the need to be respected while trying to establish balance in a situation. Annoyance that other people are in your way while trying to restore a situation.
To dream of a musical french horn represents drawing attention to the need to respect people’s feelings at all times. It also reflect an expressing feelings about the need to respect chivalry or “ladies” present.