Dreams involving vehicles, such as being a truck driver, often symbolize your journey in life or how you are navigating your personal or professional path. In this dream, the semi truck may represent a heavy burden or responsibility that you are carrying. The school bus unloading could signify a transition or a situation where others are depending on you, possibly indicating feelings of pressure to ensure their safety or success.

The act of reaching out to stop the bus by holding onto a tree branch suggests a desire to exert control over a situation that feels overwhelming or out of your grasp. Trees often represent stability and growth, so your connection to the tree branch may imply that you are seeking support or grounding in your life during a challenging time.

Overall, this dream could reflect your feelings of responsibility and the need to maintain balance while managing various aspects of your life. It may be helpful to consider areas where you feel pressured and think about ways to find stability or support. Acknowledging these feelings can lead to personal growth and a better sense of control in your waking life.