Council chiefs have apologised to drivers for the current traffic disruption at Horns Bridge roundabout.
Delays at the busy gateway to Chesterfield are expected to last until the end of August as a controversial sculpture is installed.
Groundworks on the island started on Monday ahead of the £300,000 artwork being placed there in September.
A number of lanes around the roundabout have been closed and the traffic lights switched off – causing traffic misery at busy times.
A spokesman for Chesterfield Borough Council said: “The roadworks are likely to be in place for six weeks.
“We are sorry for anyone experiencing delays at peak times – please plan ahead and allow extra time for your journey.
“The contractors, Killingley, are working with Derbyshire County Council, which is responsible for highways, to ensure restrictions are in place to maintain the safety of the workforce on site and road users. These restrictions are assessed on a daily basis.”
The sculpture, called Growth, by local artist Melanie Jackson, will feature a wheel to symbolise the town’s strong industrial heritage.
The overall project is expected to be finished by the end of the year.
The council spokesman added: “The project is funded by the European Regional Development Fund and Barratt Homes – this funding can only be used for this purpose and cannot be used to fund any other council service.
“The idea for the statue came from the business community asking the council to make the entrance points to the town more attractive and Growth was chosen by residents and business leaders in a consultation last year.”