Amends GS 20-141 to enact a new subsection establishing a minimum speed limit of 10 mph below the posted speed limit for all State roads, effective when appropriate signs are posted indicating such, excluding roads with a grade of more than 5%.

Amends GS 20-146 to prohibit vehicles with a gross vehicle weight rating of 26,001 pounds or more from operating in the left-most lane of a controlled-access highway with six or more lanes.

Effective December 1, 2023, and applies to offenses committed on or after that date.