The 'default' limit has now reduced from 80 kilometres an hour to 60 kilometres an hour.
The changes came into effect at midnight last night in an effort to reduce collisions and road fatalities.
Slower speeds are also due to be brought in for built-up areas as well as on national roads later this this year.
People travelling in rural areas from today will see the changes in those speed limits on road signs nationwide.
Wicklow Surgeon Honoured By Tallaght University Hospital
Arklow born Surgeon Is Included In Tallaght Hospital Staff Hero Award Winners for 2026
Extra Lifeguards Deployed With Extended Hours On Wicklow Beaches This Week
The Irish Coast Guard is urging anyone planning an activity on or near the water to keep safety in mind, and be aware of the serious risk of cold-water shock.
Bus Service Boost For Wicklow with Connections to Carlow & Kilkenny
A revised local link route will provide direct access to Arklow Train Station from Monday.
Greystones Man Given Suspended Sentence Following Sustained Campaign Of Abuse
A 'sustained, persistent and vile' campaign against an unsuspecting former golf manager in Co. Wicklow after one man was left aggrieved by decisions made at Druid's Glen
Appeal for Information As Rathdrum Man Reported Missing
7:00am - 10:00am
Saturday Breakfast
Sunny intervals
High: 25°C | Low: 17°C
Sunny intervals
High: 24°C | Low: 16°C
Sunny intervals
High: 25°C | Low: 17°C
Thundery shower
High: 25°C | Low: 17°C
Sunny intervals
High: 30°C | Low: 17°C