The new law makes it unlawful to drive in the left lane unless passing. Here is the full text of the bill that goes into effect August 15:
Overtaking and passing another vehicle
SECTION 1. Article 13, Chapter 5, Title 56 of the 1976 Code is amended by adding:
"Section 56-5-1885. (A) A vehicle may not be driven in the farthest left-hand lane of a controlled access highway except when overtaking and passing another vehicle.
(B) Subsection (A) of this section does not apply:
(1) when no other vehicle is directly behind the vehicle in the left lane;
(2) when traffic conditions and congestion make it impractical to drive in the right lane;
(3) when snow and other inclement weather conditions make it safer to drive in the left lane;
(4) when obstructions or hazards exist in the right lane;
(5) when, because of highway design, a vehicle must be driven in the left lane when preparing to exit;
(6) to law enforcement vehicles, ambulances, or other emergency vehicles engaged in official duties and vehicles engaged in highway maintenance and construction operations;
(7) when a driver of a tractor-trailer commercial motor vehicle combination is unable to move into the right lane safely due to another vehicle overtaking or passing his vehicle to the right; or
(8) when a driver of a vehicle requiring a commercial motor vehicle license to operate is unable to move into the right lane safely due to a highway grade or another vehicle overtaking or passing his vehicle on the right.
(C) Nothing in this section shall limit the Department of Transportation's ability to establish and delineate lane restrictions for certain types of vehicles.
(D) The Department of Transportation must place signs along interstate highways directing slower traffic to move to the right. The signs must be placed at intervals of no more than thirty-five miles.
(E)(1) A person who is adjudicated to be in violation of the provisions of this section must be fined not more than twenty-five dollars, no part of which may be suspended. No court costs, assessments, or surcharges may be assessed against a person who violates a provision of this section. A custodial arrest for a violation of this section must not be made, except upon a warrant issued for a failure to appear in court when summoned or for a failure to pay an imposed fine. A violation of this section does not constitute a criminal offense. Notwithstanding Section 56-1-640, a violation of this section must not be:
(a) included in the offender's motor vehicle records maintained by the Department of Motor Vehicles;
(b) included in the criminal records maintained by SLED; or
(c) reported to the offender's motor vehicle insurer.
(2) A violation of this section is not negligence per se, or contributory negligence, and is not admissible as evidence in a civil action.
(3) A law enforcement officer must not search, and may not request consent to search, a vehicle, or the driver or occupant of the vehicle, solely because of a violation of this section.
(4) A person charged with a violation of this section may admit or deny the violation, enter a plea of nolo contendere, or be tried before either a judge or a jury. If the trier of fact is convinced beyond a reasonable doubt that the person violated the provisions of this section, then the penalty is a civil fine pursuant to item (1) of this subsection. If the trier of fact determines that the State has failed to prove beyond a reasonable doubt that the person violated the provisions of this section, then no penalty shall be assessed.
(5) A person found to be in violation of this section may bring an appeal to the court of common pleas."