Garda Kevin Flatley has been described as "one of life's good guys" by his colleagues.
Garda Flatley was killed after he was struck by a motorcycle while carrying out a checkpoint in the Lanestown area of north county Dublin.
Garda Commissioner Drew Harris said there will be a review of road safety following the death of Garda Flatley yesterday.
Speaking on RTÉ's News at One programme, Sergeant Stephen Lavin said that Gda Flatley was good at his job and a devoted family man.
"He would always have conversations about weekends he would have away with his two young girls, going travelling around the country for football, and he'd be big into movie nights and sitting at home with the girls," he said.
Also speaking on the programme, Sergeant Eoin Boyle described Garda Flatley as "an all-round sound gentleman".
"He tended to be incredibly diligent in terms of getting his paperwork done, he would tend to cross over and make sure that everything was finished," said Sgt Boyle.
"I think pretty much everything he did was geared around his family, everything was geared around catering for his family. he was very much a family man."
Sgt Lavin said that the nature of Gda Flatley’s death is a "big reminder" of the dangers involved as a member of An Garda Síochána.
'An absolute gentleman' - GAA club pays tribute to Gda Flatley
The GAA club in Balbriggan of which Gda Flatley was a member described him as an "absolute gentleman" who was always willing to help when he could.
O'Dwyer's GAA club - where Gda Flatley coached the u10 girls team and where his two daughters also play - said he was "an absolute gentleman who always lent a hand when he could".
"He was always a pleasure to chat to, and his grá for GAA and helping others shone through in every conversation. He was a dedicated coach with our u10 girls team, encouraging the players at all times and bringing great energy."
Speaking on RTÉ's Morning Ireland, club chairperson Dave Rooney said Gda Flatley was always a positive person with a positive influence.
"He was always positive around the club, positive influence and always smiling, had a fantastic way about him within the club, and he was always willing to lend a hand and helped where he could."
Mr Rooney said Kevin Flatley always had a smile and a positive way with the children.
"I know the coaching team is devastated," he said.
Mr Rooney said the club will hold a minute's silence and pause games to pay tribute.
"We will also support [his wife] Úna and the family when the funeral arrangements are announced," added Mr Rooney.
The mood was sombre and sad at O'Dwyer's GAA club today. Members arrived throughout the morning to sign a book of condolence and to pay their respects.
'Cherished colleague'
Meanwhile, the Garda Representative Association Vice President said he and his colleagues have been left numbed and saddened by the sudden death of their "cherished colleague" Gda Flatley.
Detective Garda Niall Hodgins, who represents the north Dublin Metropolitan Region, said: "Not only was he a teammate of the wider garda family, he was a cherished colleague and a great friend to all of us."
He said Gda Flatley was a young family man "and to his wife and to his children, we extend our deepest condolences at this very tragic and sad time".
He gave his condolences to his friends who had served with him at Pearse Street and previously at Blanchardstown garda stations "and particularly those colleagues of his that work alongside him in the Roads Policing Unit".
He said Gda Flatley had given great service and dedication to his community and had been working this weekend to try to ensure the roads were kept safe.
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He added: "This is indicative and a reminder of the dangers that members of the garda face every single day that they go out to perform their duties."
He said the GRA was appealing to any members of the public with dash cam footage to contact Swords Garda Station or the Garda Confidential Line.
"Anybody, no matter how small they think that bit of information they may have, it could be the piece of the jigsaw that could help investigators establish how this tragedy occurred today."
Road policing 'one of the most dangerous work environments'
Deputy General Secretary of the Association of Garda Sergeants and Inspectors Kevin Bolger also paid tribute to Gda Flatley, saying it is a "massive tragedy".
Speaking on RTÉ's Morning Ireland, Mr Bolger said Kevin Flatley was "a lovely gentleman" and chose to work in roads policing which means "you are putting yourself in the front line to absolutely insure people are safe going about their day-to-day business".
"More so than crime and everything like that, you interact with absolutely every facet of life. People commuting, people cycling, people walking, schools, education, wider community groups, sporting groups and you're trying to impart that knowledge and make the roads a safer place."
He said that the road "is a dangerous work environment".
"You have live traffic, you have everything around. It is probably one of the most dangerous work environments you have.
"But as experienced members in the job, we're more than aware of that but sometimes something can go tragically wrong. And ultimately Kevin paid the ultimate sacrifice yesterday and unfortunately lost his life."
He added that this is a time for reflection and is the start of a process with the review by the commissioner.
"But right now it's the wider garda family who will wrap our arms around each other and we'll make sure that everyone is safe and well and gets through this difficult time."
The Road Safety Authority expressed its deepest condolences to the family, friends and colleagues of Gda Flatley.
"He died while carrying out his duty - on the front line of road safety - working to protect others. We stand in solidarity with An Garda Síochána and all those mourning his loss," it said in a statement.
Books of condolence open around country
Books of condolence were opened at Fingal County Council offices in Swords and Blanchardstown, at the local library, at the garda station in Balbriggan and at O'Dwyer's GAA club in Balbriggan.
Tributes to Gda Flatley were paid by the Lord Mayor of Cork Dan Boyle at Anglesea Street Garda Station this morning where a book of condolence was opened.
Outside the city's garda headquarters, the Irish tricolour is flying at half-mast.
Among the first to sign the book of condolence were local gardaí of all ranks, together with senior Circuit Court judges Helen Boyle and Dermot Sheehan, and Cork City Council Chief Executive Valerie O'Sullivan.
