The existing lights need to be replaced to maintain journey reliability and reduce the likelihood of emergency repairs in the future. The work will be carried from Monday 12 January using overnight lane closures and is due to be completed, weather permitting, by the end of March.
Highways Agency project sponsor Anita Waterton said:
The existing lights help to increase the capacity of this busy roundabout and need to be replaced to ensure the junction continues to operate safely and efficiently. Without the traffic lights the safety and capacity of the roundabout would be reduced. We have planned the replacement to be carried out overnight, when traffic flows are lowest, to minimise disruption.
The work will be carried out overnight, between 8pm and 6am, and will involve various lane closures on the approach roads and on the roundabout itself. While work is carried out by the London-bound entry slip road, a diversion will be in place to junction 9 via Willesborough Road and the A28.
During the replacement, the traffic lights will remain off at all times and pedestrian crossings will be closed for safety reasons. Pedestrians will be diverted to use other footpaths where necessary.
Members of the public should contact the Highways Agency Information Line on 0300 123 5000.
Journalists should contact the Highways Agency press office on 0844 693 1448 and use the menu to speak to the most appropriate press officer.