Usually bridges are only built over water, barring extenuating circumstances like bridges that must be made to connect mountain paths, but these are much rarer and you will likely not see them very often unless you actually live on a mountain or go hiking pretty regularly. In order to interpret the meaning of a bridge built over water, in a dream, we must take into account the water as well. So what does it mean when you dream of water?
Water symbolizes emotions and the level to which you feel emotional stress. If the body of water is calm in your dream this usually suggests that you have a very controlled sense of your emotions. You are able to keep things together fairly well even if you are dealing with something very emotionally traumatizing. This is a rare talent. To dream that you have a very turbulent body of water beneath you suggests that you feel emotionally reckless. There are a lot of different feelings passing through your heart right now and it is tough for you to catch onto any one of these. The ones that you do catch onto make you feel really tumultuous.
If you have a dream about a bridge it means that you are safely crossing whatever field of emotions you are feeling right now and are able to make it through easily. If the water below is calm and placid and you are taking a bridge over it, this suggests that you are able to perfectly navigate your emotions. Not only that but in many situations you take the emotional high road and you know exactly how you are supposed to respond to emotionally tense situations that have the potential to be awkward for you. To dream that you are crossing a bridge over turbulent waters suggests that you are still able to navigate your emotions, but you have to try different routes that ignore them. To dream of being on a boat means that you are navigating them. A bridge suggests some level of suppression is involved so that you don’t have to think too much about what you are feeling. This may work for a while but it will not ultimately work forever.
Finally once all that information is understood it should become fairly clear what it means to dream of a broken bridge. To dream of a broken bridge implies that you have lost a certain support that you once used to get you through rough situations and now you will have to rely on something else or just shut down entirely. Did you just go through a rough break up or did someone that you once relied on die? These might be reasons why you are having dreams in which you are confronted with a broken bridge that you are unable to cross.