The temporary measure will see one lane of traffic removed from Sandyford Road onto Main Street as far as the Lidl car park, creating extra space for pedestrians and cyclists.
Dun Laoghaire Rathdown County Council says it's aimed at providing a calm traffic environment and more space for pedestrians and cyclists.
A number of bus services will be re-routed.
Similar changes were introduced in Blackrock Village.
Elderly Man Hospitalised With Serious Injuries Following Bray Bus Collision
Snow Warning Issued For Wicklow After A Day of Wind and Rain
Arklow Born Olympic legend Ronnie Delany — Immortalised Forever In Gold Dies Aged 91
Wicklow To Receive Government Funding To Bring Vacant Local Authority Homes Back Into Use
Major Wicklow Train Station Upgrade Moves Ahead as DART Plans Progress