Lane restrictions, 30mph speed limits and some overnight closures will be in place to allow for further work to the Sutterton roundabout, which connects the A16 and A17.
Lincolnshire County Council will carry out the works to improve the flow of traffic at the pinch point on the A16 and A17, in between Boston and Spalding.
Work began to widen the approach lanes, install better signage and road markings and upgrade the street lighting on the roundabout in January.
The council still has funding available to further widen the A16 approach to the roundabout from Spalding.
This will provide greater queuing capacity and, in turn, reduce delays for traffic travelling on this route.
Much of the work will be completed with lane closures and a temporary 30mph speed limit in place.
Access will be maintained to businesses and properties as far as reasonably practicable.
Some resurfacing works will take place under overnight road closures, with details released once confirmed.
The closures will be in effect from 6pm, with the road reopened to traffic no later than 6am each morning.
A fully-signed diversion route will be in place during the closures.
The project is expected to continue until early May, although works will be suspended and traffic management reduced to a minimum over the Easter bank holiday weekend.
The council has apologised for any inconvenience caused.