Roadworks lasting twelve weeks have started on a busy stretch of the A406 North Circular.
Transport for London (TfL) started carrying out repairs to the carriageway and road surfaces between Waterworks roundabout and Charlie Browns roundabout on Friday.
Work will take place on the eastbound carriageway from July 25 to September 18 and on the westbound carriageway from September 19 until mid-October.
The majority of work will take place overnight during the week, between 10pm and 8am, with lane restrictions and slip road closures on Saturday during the day and on Monday and Tuesday nights.
Drivers are advised to regularly check before they travel as Transport for London have said closure times will vary throughout the project.
Bus route 123, which runs on the A406 Southend Road, will also be diverted from the start of the work until the end of service on certain nights.
Garrett Emmerson, chief operating officer for surface transport at TfL, said: "While there is obviously no perfect time to close an essential road for maintenance, this vital work will ensure that the road can remain in a good condition for years to come.
"Once completed, it will reduce the need for future work, while ensuring traffic can continue to flow on a quieter, smoother carriageway."