These minimum speeds shall be effective only when appropriate signs are posted indicating the minimum speed.
Speed limits set pursuant to this subsection are not effective until appropriate signs giving notice thereof are erected upon the parts of the highway affected.
When local authorities annex a road on the State highway system, the speed limit posted on the road at the time the road was annexed shall remain in effect until both the Department and municipality pass concurrent ordinances to change the speed limit.
The Department of Transportation is authorized to raise or lower the statutory speed limit on all highways on the State highway system within municipalities which do not have a governing body to enact municipal ordinances as provided by law. The Department of Transportation shall determine a reasonable and safe speed limit in the same manner as is provided in G.S. 20-141(d)(1) and G.S. 20-141(d)(2) for changing the speed limits outside of municipalities, without action of the municipality.
A law enforcement officer issuing a citation for a violation of this section while in a highway work zone shall indicate the vehicle speed and speed limit posted in the segment of the work zone, and determine whether the individual committed a violation of G.S. 20-141(j1). Upon an individual's conviction of a violation of this section while in a highway work zone, the clerk of court shall report that the vehicle was in a work zone at the time of the violation, the vehicle speed, and the speed limit of the work zone to the Division of Motor Vehicles.
No drivers license points or insurance surcharge shall be assessed on account of a violation of this subsection.
N.C. Gen. Stat. § 20-141