There are several synonyms for the phrase "do u turn." One common synonym is "make a U-turn," which means to turn 180 degrees so that you are facing the opposite direction. Another synonym is "turn around," which refers to pivoting your vehicle to face the opposite direction. Additionally, you can use the phrase "reverse direction" to indicate that you need to change the way you are traveling. Finally, "turn back" is another synonym that describes turning around and heading back in the direction from which you came. Whatever the synonym, it is important to always be mindful of traffic and take proper precautions when changing direction on the road.