Drivers are being warned gardaí will be out in force for the next 24-hours as part of National Slow Down Day.
156 people died on the country's roads last year, the highest number since 2016.
Gardai say around one-third of collisions are caused by speeding.
In the first two hours of the road safety operation, gardaí one driver was caught doing 117 kilometres in a 50 km zone in Baile An Phoill in Galway.
While another driver was doing 122 kilometres an hour in an 80 zone in Lucan, Dublin.
In 2022, around 7 in 10 crashes happened on rural roads where the speed was more than 80 Km/Ph.
In the first 2 hours of National #SlowDown Day, GoSafe checked 36,679 vehicles & detected 69 speeding vehicles, including:
-117km/h in 50km/h zone on N6 Baile An Phoill Gaillimh
-122km/h in 80km/h zone on N4 Lucan Dublin
-138km/h in 120km/h zone on M6 Tyrrellspass Westmeath pic.twitter.com/1FZLyrfRj2
— An Garda Síochána (@GardaTraffic) February 28, 2023
Sam Waide, CEO, of the Road Safety Authority, said speeding is too common on Irish roads.
"The RSA’s Free Speed observational study found that half of all drivers (52%) were observed speeding on urban roads and over a quarter (27%) were speeding on rural roads".
Gardai say there will be a high level of enforcement on the roads today to remind people about the dangers of speeding and its impact on families and communities.
The 24-hour operation began on Tuesday morning and will continue until 7 am on Wednesday 1st March.