Separately a woman in her 40s received serious injuries in an accident in Wicklow
Two men have been killed and a woman seriously injured in separate road crashes across the country.
It is understood a male pedestrian in his 30s died after he was involved in a collision with a truck in Cork city earlier today.
Last night meanwhile, man in his 40's died following a single vehicle road accident in Limerick - while a woman in her 40's received serious injuries following a collision in Wicklow.
Brian Farrell from the Road Safety Authority (RSA) has warned that July is the most dangerous month on Irish roads, following a number of fatalities in recent week.
"We have had good weather and there are more people simply using the roads," he said. "I suppose with that added traffic comes higher risk and so there is just a greater degree of casualties this time of year."
"I think it is also a fact that people tend to relax the guard more this time of the year and become less aware of the dangers that you face out on the roads.
Gardaí said the Limerick incident - involving a car and a pedestrian - occurred on the Kileely Road near Thomond Park in the city.
The 40-year-old male pedestrian was seriously injured after he was struck by the car at approximately 23:35pm last night.
He was taken by ambulance to University Hospital Limerick where he was later pronounced dead.
Gardaí said the male driver of the car – aged in his late 20s - was uninjured.
Gardaí have launched an investigation and are appealing for witnesses to the collision.
Separately, Gardaí are appealing for witnesses to a serious crash that occurred in Wicklow yesterday evening.
Gardaí said the two car collision occurred at Kilmurray Lower, between Baltinglass and Kiltegan at approximately 6pm yesterday.
A woman - aged in her 40s - received serious injuries in the incident and was transferred to Naas and later to Beaumont Hospital.
Two passengers in the car – both females aged 7-years old and 70 years-old – were also taken to hospital. Their injuries are not thought to be life threatening.
The sole occupant of the second car – a female in her 50s – was taken to Naas General Hospital where her injuries are not thought to be life threatening.
The scene has been preserved for examination by Garda Forensic Collision Investigators and anyone with any information is asked to contact Baltinglass Garda Station 059-6482610 or the Garda Confidential Line 1800 666 111.