Those with a degree of familiarity with the stretch of Route 113 between Snow Hill and Langmaid Road will need to readjust the cruise control as the State Highway Administration has lowered the speed limit in the work area to 45 m.p.h.
Speeding fines are doubled in the reduced speed zone.
Robert Rager, the district community liaison for the SHA, said the reduced speed requirement would last until the dualization of this stretch of road is complete at the end of 2017.
The newly-expanded stretch of road is expected to open to traffic in early 2018.
Two phases of the decades-old dualization work still remain, with Phase 4 being the 4.3-mile stretch between Five Mile Branch Road in the north to Public Landing Road to the south. It is expected to be complete and open to traffic by the end of 2019.