Mississippi Code Title 63. Motor Vehicles and Traffic Regulations § 63-3-613

(1) The driver of a vehicle may overtake and pass upon the right of another vehicle which is making or about to make a left turn.

(2) The driver of a vehicle may overtake and, allowing sufficient clearance, pass another vehicle proceeding in the same direction either upon the left or upon the right on a roadway with unobstructed pavement of sufficient width for four (4) or more lines of moving traffic when such movement can be made in safety. The left lane shall be the preferred passing lane. No person shall drive off the pavement or upon the shoulder of the roadway overtaking or passing on the right.