The Department of Transport and Public Works is making good progress with a R186 million project to rehabilitate a 7km portion of the N2 between Borcherds Quarry Road and the R300, and to add a third lane in both directions.
About 82 000 vehicles travel on the affected stretch of road every day.
The project, which began in January this year, is expected to be completed in mid-2017.
So far, the project is 30% complete, with phase 1 of the work on the third lane nearing completion, and the widening of the Borcherds Quarry Bridge complete.
Current work in progress include the rehabilitation of the existing middle and left lanes, as well as piling and earthworks to prepare for the future construction of a bridge and interchange from Eisleben Road onto the N2.
The upgrade will improve the carrying capacity of the road, especially for buses and taxis during peak periods, the quality of the road will be improved and better street lighting will be installed.
The department said every attempt will be made to facilitate the flow of traffic and minimise delays.