How can lane changing assist help you in this situation without steering override?

You answered correctly. Lane changing assist can warn you of a possible collision with a vehicle in the middle lane, helping you avoid dangerous situations when changing lanes. This system uses sensors to monitor the adjacent lanes and alerts you if there is a vehicle in your blind spot or approaching quickly, but it does not automatically change lanes or brake on its own. Always pay attention to these warnings to ensure safe lane changes, especially at high speeds on the highway.