A £200,000 resurfacing and reconstruction scheme is programmed to start in Londonderry later this week.
The work will begin on the Caw Roundabout on September 2.
The Department for Infratructure says the programme of works will strengthen the carriageway and improve the running surface.
In order to minimise the disruption to traffic at this very busy junction, the work will be undertaken between the hours of 7pm and 7am and will last for four nights.
The Department is advising that some disruption can be expected for the duration of the scheme and road users should allow additional time when planning any journeys.
A contraflow system will be in operation and drivers should take particular care to follow the signs and lane markers.
Access for local residents and businesses will be accommodated throughout.
Subject to favourable weather conditions the work is expected to be substantially complete by September 5.
For more information visit www.trafficwatchni.com