Main construction work on the controversial £160m A6 Randalstown to Castledawson Dualling Scheme is due to begin in the next few weeks.
Work will take place on the sections from Randalstown to Toome and from Moyola to Castledawson Roundabout.
The route of the road has caused controversy after environmentalist Chris Murphy launched a legal bid to halt construction of the part of the road near Mossbawn, Co Derry - the childhood home of the deceased Nobel laureate poet Seamus Heaney.
Mr Murphy failed in his latest legal challenge but has been until 9 May to lodge an appeal. Transport Network was no told no appeal has been lodged on the court system at the time of writing.
The scheme is designed to upgrade a total 14.7km of the strategically important corridor and deliver reductions in peak journey times by at least a quarter. It will also remove several bottlenecks along the route and also could significantly improve road safety.
The entire scheme is expected to be substantially complete in early 2021, with the Randalstown to Toome section open to traffic as soon as 2019.
Officials in Northern Ireland's Department for Infrastructure said: 'In relation to the contested section near Mossbawn, only essential work involving alterations to utility supplies, minor archaeology / geotechnical testing and ground preparation to the south of the existing bypass will be completed at this time.
'The Department will work to bring any future legal proceedings regarding this section of the route to a conclusion as soon as possible.'
The public will be kept informed by advance signing and through the Department’s Trafficwatchni website.
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