A six month project to improve traffic flow at the Toll Bar roundabout in Grimsby is set to start later in July.
Contractors will move to the site from Monday, July 20 and begin work on the road a week later.
Entry and exit points are to be widened on the roundabout in order to reduce congestion and help traffic move easier.
From Monday, July 27 to Thursday, July 30, Station Road will be closed in the daytime between 7.30am and 7pm, affecting the east and west of the roundabout.
The A16 north and south will also have a two-way traffic signal over these four days.
The roundabout’s ‘splitter’ islands on the four entries will be removed in the first week of construction.
North East Lincolnshire Council aim to keep the roundabout largely open throughout the schedule of works, without using four-way traffic lights.
Councillor Stewart Swinburn, cabinet member for transport at North East Lincolnshire Council, said: “In every decision taken, the safety of roads users and contractors has been a priority.
“We hope residents can see we have taken into consideration a lot of factors and worked with key stakeholders. We thank everybody for their valued contributions.”