As prayers were being said for victims of road fatalities, families in counties Mayo and Wexford were also plunged into mourning.
The weekend’s deaths, both of which involved young men in single vehicle accidents, brings this year’s road fatality toll to 253.
A 21-year-old man died in Wexford on Saturday night when his car collided with a wall at Newbawn.
He was pronounced dead at the scene shortly before 9pm.
Hours later Donal Neary, from Carrowcrum, Bonniconlon, Co Mayo, died at the scene after his BMW car left the road and smashed into a tree at about 1am.
Meanwhile, memorials were staged to mark World Remembrance Day for Road Traffic Victims.
More than 3,200 people have been killed on roads in the Republic since the turn of the decade.
Chairman of the Road Safety Authority Gay Byrne said the day should serve as a reminder for road-users to know their vulnerability.
“Every day, another person dies or is seriously injured on our roads. This can’t go on,” he said.
Brian Farrell of the Road Safety Authority (RSA) said, despite improvements in motorists’ behaviour, care is still needed on the roads.
The RSA said that for every life lost in collisions, an estimated 100 people were left grieving their loss.
“World Remembrance Day provides us all with an opportunity to remember those whose lives have been tragically lost on our roads, and whose families have been devastated,” he said.
“Remember those who have died, think of the never-ending grief of their loved ones and then think about how you can change your own behaviour to ensure you and your family are safe on the road.”
Susan Gray, whose husband Stephen was killed in a road accident in 2004, said the day commemorated the dead and acknowledged the pain of their families.
“It is a very fitting tribute to all our lost loved ones to have a day each year set aside in memory of their life on this earth,” said Ms Gray who founded PARC (Promoting Awareness, Responsibility and Care on our roads).
“This is also a day to remember all the grieving families left behind with the heartbreaking pain of never seeing our loved ones again,” she said.
“It is also a day to remember all those who have been seriously injured on our roads, many needing permanent care for the rest of their lives.”
The RSA pledged to mark the day by distributing 300,000 road safety DVDs and reflective armbands to motorists and vulnerable road users.