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.
Free Child Car Seat Checks Return to Wicklow Next Week
53% of car seats checked were incorrectly fitted, and needed adjustments to make them safe,
Sinn Féin Say Wicklow Rent Hikes Forcing Families Into "Impossible Choices"
Sinn Féin TD warns of devastating impact as Council considers 100-200% increases; protest planned for Monday
Wicklow Sports Clubs Encouraged To Apply For Funding For Community Facilities
Wicklow Commuters: Have Your Say on Dublin-Wexford Rail Line
The long complained about service is up for discussion at a public meeting in Gorey.
Blessington Farm Steps Into National Spotlight
Tinode dairy farm hosts National Dairy Council campaign celebrating Irish agriculture
Light rain
High: 17°C | Low: 12°C
Light rain
High: 17°C | Low: 11°C
Light rain
High: 17°C | Low: 9°C
Light rain
High: 17°C | Low: 10°C
Light rain
High: 17°C | Low: 10°C
