Works to replace worn out carriageway on A17 Washway Road in Fleet Hargate and Long Sutton will be carried out in two separate phases from February 19.
The work is expected to finish by March 24, subject to reasonable weather.
The first phase will take place from February 19 to March 9 between Hurn Road and Lowgate in Fleet Hargate.
The next phase will take place north of Lutton Garnsgate junction to south of Delph Road from Monday, March 12 to Saturday, March 24.
Temporary traffic lights will be in use from 7am to 6pm on the weekdays, except for the final five evenings of work in Fleet Hargate, which will be carried under a road closure.
On these evenings, the road will be open to traffic outside of working hours, access will be limited depending on the location of the work being carried out.
In addition to this, a temporary 10mph speed limit will also be enforced during work hours, along with a temporary 40mph speed limit during the day.
The signed diversion route for the Fleet Hargate closure will be via A17 / A151 / A16 / A47 / A1101 / A17 and vice versa.
Delphi Road and Lutton Garnsgate will be closed during work hours as part of the Long Sutton works.
The signed diversion route for this closure will be either via Garnsgate Road/B1359 or Burlier Gate/St James Road/B1390, depending on where work is taking place each evening.
The improvement works will take place overnight so that minimum disruption is used to the public.
Cllr Richard Davies, Executive Member for Highways, said: “The improvements we’ll be carrying out on Washway Road from February to March are essential to keeping the A17 through Fleet Hargate and Long Sutton up-and-running.
“Taking care of essential maintenance now, as part of one package, will mean less disruption for residents and commuters in the future.”