From October 3 to November 5, 2021, Wiltshire Council will temporarily close the junctions to Kington Langley and Kington St Michael.
The closure is to replace the no longer fit for purpose lights and signalling technology on the A350 dual carriageway north of Chippenham at Plough Crossroads, Kington St Michael.
At the same time the council will also change all the streetlights to LEDs, resurface the junction, and install new road markings/studs between the Malmesbury Road roundabout at Chippenham and the M4 Junction 17 roundabout.
A spokesman for the council said: “For the duration of the works, there will be lane closures in place on the A350 dual carriageway, and to keep the traffic moving on the main route, the junctions to both Kington Langley and Kington St Michael will be closed, with diversions in place.
“There will also be a temporary speed limit of 30mph in place in the area for the full period. The closure of the side roads will enable the A350 to remain open and free of traffic signals for the majority of the work.
“Night-time road closures will be in operation for the resurfacing work, so people should expect delays in the area.”
Cabinet member for transport, Dr Mark McClelland said the works were essential to replace the now 20-year-old lights.
“We are committed to investing in Wiltshire’s roads, and this upgrade project is part of our £22.9m programme of works this financial year,” he said.