A 30 kilometre per hour speed limit is being introduced in more than 170 local authority housing estates throughout Sligo town and county from the start of next year.
It follows a decision by Sligo councillors at their meeting this week.
The council's road design department carried out a survey of roads in 344 housing estates estates.
Area engineering staff then compiled a list of 174 in which the 30kph limit will be imposed.
Some housing estates already have a 50kph limit and this has to be revoked in those estates before the new 30kph limit can be applied.
This process will start as part of a review of speed limits on national and non-national roads, which will begin soon.
Estates not in county council charge cannot be considered for the new speed reduction.
Sinn Fein Councillor Thomas Healy says the latest move addresses a concern by people living in estates:
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