A motorist travelling at 147km/h in a 60km/h zone in Cookstown in Dublin was among over 1,800 drivers detected speeding over the St Patrick's Bank Holiday Weekend.
The driver was found to have been at nearly two-and-a-half times the speed limit on Katherine Tynan Road.
Among the other notable speeding incidents detected was a driver travelling at 209km/h in a 100km/h zone on the N3 in Daggan, Butlersbridge in Co Cavan.
In addition, a motorist was clocked at 113km/h in a 50km/h zone in Coolock in north Dublin, while another was caught speeding at 157km/h in an 80km/h zone on the R731 in Monamolin, Rathnure, Co Wexford.
An extensive garda roads policing operation was in place from 7am last Thursday until of 7am of Tuesday this week.
Gardaí have said that during this time there were three fatalities, as well as five more collisions resulting in injuries.
Over 9,970 roadside drug and alcohol tests were conducted, which led to 175 arrests for driving under the influence of an intoxicant.
Penalty points were also issued in more than 170 cases for drivers using mobile phones, while 59 drivers were found not to be wearing seatbelts.
More than 75 vehicles were seized from learner permit holders driving unaccompanied, while over 385 vehicles were seized for having no tax or insurance
Chief Superintendent Jane Humphries of the Garda National Roads Policing Bureau thanked drivers for their cooperation over the weekend, and urged people to prioritise safe driving habits every day.
"Gardaí nationwide continue to work hard to enforce road traffic laws and highlight the importance of road safety among communities," she said.
She added: "We appeal to schools, workplaces, colleges and community groups to help us raise awareness among all ages, and we are always happy to get the opportunity to present to groups.
"Every single one of us have a responsibility to practice good driver behaviour and prevent both road fatalities and serious injury road traffic collisions. We have got to work together."
