Whenever a highway or roadway has a central lane in which traffic may enter from either direction for the purposes of making a left turn, no vehicle shall be driven into such central lane except for the purpose of making a left turn, and no vehicle shall enter into such central lane at a location which is more than 300 feet from the location where the vehicle will turn left across one or more lanes of oncoming traffic. No vehicle which has been driven into such a central lane shall be operated in such central lane for more than 300 feet.
Georgia Legal Code