On one hand, the dream could show you that you have belief in a bigger picture, a grand design, fate, and a higher purpose for yourself and your life. This symbol shows that you feel that your decisions are less important than fulfilling something larger than yourself. Riding on the cable car (or train, subway, bus, etc.) could mean you "on track" and that you are exactly where you are supposed to be.
On the other hand, it could also show you that you are being passive in your life's decisions. You may be just following the masses and not listening to your inner voice and are over-influenced by others. Perhaps you have made compromises in order to avoid conflict or maintain the status quo.
Often associated with these vehicles is missing one since they run on a schedule and have a specific set path. Missing your ride can mean you feel you have missed an opportunity or fear you will. Perhaps you feel behind and are in need of catching up in order to achieve your goals.
Since cable cars, trains, subways and buses all ride on a set path, seeing them in dreams could mean you do not believe you have control over the path of your life. This could be both positive and negative.
Cable Cars, trains, subways and buses in Dreams