Almost 200,000 vehicles were checked as part of An Garda Síochána's National Slow Down Day.
The 24-hour operation in conjunction with GoSafe ran from 7.00am on Friday.
In total, An Garda Síochána and GoSafe checked 195,768 vehicles and detected 304 vehicles travelling in excess of the speed limit.
Among those detected over the limit were 132km/h in a 100km/h Zone on the N11 Mt Kennedy Demesne at Newtownmountkennedy in Wicklow, 138km/h in a 100km/h Zone on the R132 Mell Killineer in Louth and 153km/h in a 120km/h Zone on the M7 Ballyshaneduff Or The Derries Ballybrittas in Laois.
Chief Superintendent Paul Cleary of the Roads Policing Bureau said "We would like to thank the 195,768 drivers who were found to be compliant and drove within the speed limit and would encourage all drivers to drive safely, comply with and respect speed limits".
"I would like to thank the Road Safety Authority and all the organisations who were involved in and supported this campaign.
"Drivers, please, think about the consequences of speeding the next time you get behind the wheel and reduce your speed accordingly."
Some other notable detections over the 24 hour period include:
• 87km/h in a 50km/h Zone on the R118 Rock Road Dublin 4 Dublin
• 81km/h in a 50km/h Zone on the R102 Griffith Avenue Dublin9 Dublin
• 79km/h in a 50km/h Zone on the R445 Ballymany Newbridge Kildare
• 154km/h in a 100km/h Zone on the N20 Kilmona Grenagh Cork
• 115km/h in a 80km/h Zone on the N55 Auburn Glasson Westmeath
• 143km/h in a 100km/h Zone on the N26 Ballynahaglish Ballina Mayo
• 70km/h in a 50km/h Zone on the R556 Montanagay Abbeydorney Kerry
• 82km/h in a 60km/h Zone on the N54 Cornecassa Demesne Monaghan Monaghan
• 65km/h in a 50km/h Zone on the R198 Aghadegnan Longford Longford
• 77km/h in a 60km/h Zone on the M7 Lewistown Naas Kildare
• 77km/h in a 60km/h Zone on the N69 Billeragh Listowel Kerry
• 128km/h in a 100km/h Zone on the N18 Cratloe Clare
• 75km/h in a 60km/h Zone on the M7 Lewistown Naas Kildare
• 62km/h in a 50km/h Zone on the R510 Dock Road Limerick Limerick
• 62km/h in a 50km/h Zone on the R527 Ballysimon Road Limerick Limerick
• 62km/h in a 50km/h Zone on the N22 Farranfore Farranfore Kerry
• 124km/h in a 100km/h Zone on the N18 Clonmoney West Bunratty Clare
• 124km/h in a 100km/h Zone on the N7 Kill West Kill Kildare
• 124km/h in a 100km/h Zone on the N25 Parkeennaglogh Newtown Waterford
• 99km/h in a 80km/h Zone on the R148 Moyvally Broadford Kildare
• 123km/h in a 100km/h Zone on the N80 Derryclure Killeigh Offaly
• 61km/h in a 50km/h Zone on the Clontarf Road Dublin3 Dublin
• 61km/h in a 50km/h Zone on the N20 Rathgoggan South Charleville Cork
• 122km/h in a 100km/h Zone on the N20 Ballymartin Blarney Cork
• 72km/h in a 60km/h Zone on the N76 Margarets Field Kilkenny Kilkenny
• 96km/h in a 80km/h Zone on the R352 Moymore Tulla Clare
• 119km/h in a 100km/h Zone on the N13 Listellian Letterkenny Donegal
• 95km/h in a 80km/h Zone on the R392 Forgney Ballymahon Longford
• 94km/h in a 80km/h Zone on the R403 Ovidstown Clane Kildare
• 94km/h in a 80km/h Zone on the R458 Drumumna Crusheen Clare
• 94km/h in a 80km/h Zone on the R733 Ballyknock Ballymitty Wexford
• 117km/h in a 100km/h Zone on the N5 Cloonmore Termonbarry Roscommon
• 70km/h in a 60km/h Zone on the Malahide Road Coolock Dublin5 Dublin
• 70km/h in a 60km/h Zone on the R336 Na Haille Indreabhán Gaillimh
• 93km/h in a 80km/h Zone on the R733 Bargy Commons Cleristown Wexford
• 92km/h in a 80km/h Zone on the N56 Drumark Donegal Donegal
• 115km/h in a 100km/h Zone on the N25 Ballyadam Carrigtwohill Cork
• 137km/h in a 120km/h Zone on the M1 Lusk Dublin
• 114km/h in a 100km/h Zone on the N76 Tullamaine (Ashbrook) Callan Kilkenny
• 91km/h in a 80km/h Zone on the R338 Coast Road Galway Galway
• 136km/h in a 120km/h Zone on the M7 Meelick Portlaoise Laois
