Motorists in Gateshead face potential delays on the A184 Felling Bypass later this year as essential repairs to the Heworth roundabout get underway.
While the repairs are ongoing the A184 at Felling Bypass will be down to one lane and further road closures will be in place.
Heworth roundabout is supported by a series of bridges carrying the road over the Network Rail and Metro lines beneath.
The roundabout will be the focus of major repair work after structural engineers discovered water seeping into the bridge structures.
The council say that if no work is done to repair the damage, the water could cause serious and irreparable structural damage to the bridges.
The essential repair work will involve the complete removal of the road surface to allow the bridge decks to be waterproofed and a new road surface then applied.
The work is expected to take up to six months to complete and will start later this year once the necessary approvals have been received from Network Rail to carry out works above a working rail line.
To A184 Felling Bypass either side of Heworth roundabout will be reduced to a single lane in each direction while the repair work is carried out. Although the council says efforts will be made to keep both lanes open for as long as possible.
There will also be occasional full road closures at nights and at week-ends as required.
There will be further road closures while the roadworks are ongoing:
These routes will be closed to all traffic except buses.
Low Heworth Lane, with its access to Heworth North long-stay car park, will remain open.