A major commuter road into and out of Cardiff will be dug up over the next four weeks.
A new drainage system will be installed in Cardiff Road, Llandaff over the next four weeks which will see a temporary traffic light system installed out of peak hours.
Considerable delays are expected and on Sunday 30 October and Sunday 20 November there will be a complete road closure.
Drivers are advised to seek alternative roads around the area to ease jams which are expected during the restricted and total closure days.