The road used by 30,000 vehicles a day will be reduced to one lane in each direction from 9.30 am until 3.30 each day.
It will also be closed to eastbound traffic from 7.30 pm until 2 am. However, it will be open as normal during the morning and evening rush hours and at weekends.
The £2.3 million project is the second of a three-phase scheme to replace road, drains and lights and is being financed from the economic stimulus package.
• See Saturday’s JEP for full story.