The phrase "is in the driver's seat" typically denotes that one is in control or has the power in a particular situation. Synonyms for this expression could include "is in charge", "has the upper hand", "holds the reins", "calls the shots", "leads the way", or "controls the situation". All of these phrases suggest a position of authority or control that allows one to dictate the course of events. Whether in business, politics, or personal relationships, being "in the driver's seat" is a desirable place to be for those who want to steer their own destiny or influence the decisions of others.