Work to turn one of Nottinghamshire's main roads into a dual carriageway is ahead of schedule, officials have said.
The Department for Transport is spending more than £340m improving the A46 between Newark and Widmerpool.
The stretch of road had become an accident and congestion blackspot, with bottlenecks at either end.
Work on site began in June but already managers have said they hope to open the road in mid 2012, six months earlier than expected.
Manager Geoff Bethall said: "We will build the new carriageway, take the traffic off the old carriageway and then refurbish the old carriageway, which should minimise disruption."
The 17-mile (28km) stretch is designed provide a new, fast link between the A1 and M1.
The project has also uncovered archaeological remains and some areas of ancient woodland have been moved to make way for the road's path.