This is typically done when the road is too narrow for a U-turn, and there are no driveways or sideroads that are conducive to a two-point turn.
Three-point turns are dangerous because they make the driver vulverable to uncoming traffic for an extended period of time.
[2] In a narrow road or with a longer vehicle, more than three legs may be required to achieve a full 180 degree rotation.
"Three point turn" is the most common name in Australia, Canada, New Zealand, and in many regions of the United States.
[3][2][4][5][6][7] Less common terms are: "Y-turn",[8] "K-turn",[9] and Broken U-turn[10] but in the UK, the official name is "Turning in the road (using forward and reverse gears)",[11] and in Ireland it is called a "turnabout",[12] because an acceptable turn may include more than three points.