Nine Irish Rail staff have been assaulted in Dublin and 21 nationwide over the past 18 months.
A report released under the Freedom of Information Act 2014 shows that staff faced assaults both on board services and at stations across the country.
In the capital, assaults occurred at Ashtown, Howth Junction, Balbriggan, Fairview Ramp, Pearse, Rush and Lusk and twice at Connolly. An assault also took place on board a DART service.
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Some of the incidents have since been closed while others are being investigated.
General secretary of the National Bus and Rail Union Dermot O'Leary said that politicians need to focus on the "creation of a dedicated garda unit on public transport".
He told Dublin Live: "We have called for this for a while. The experience in other jurisdictions where they have a police force, see that anti social incidents are driven down year on year.
"The existence of a garda unit on public transport would, we believe, deter a lot of people from some of this behaviour."
Mr O'Leary said that there have recently been some "encouraging signs" that the Government is taking the issue of anti-social behaviour on public transport more seriously.
Fianna Fail recently launched a new public transport survey asking passengers to give their experience on safety and security on board. The party's Justice spokesman Jim O'Callaghan also said that a dedicated garda transport unit should be formed as Dublin is lacking compared to other cities.
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He said on Newstalk earlier this month: "When people use a form of public transport, they have to believe that they're going to be protected when they're using it. We see that in other cities where the public transport is very safe, because there's an awareness there if you get involved in anti-social behaviour... the authorities come down on you like a tonne of bricks.
"Unfortunately that doesn't appear to be the situation in Dublin, particularly, at present".
A spokesman for Irish Rail told Dublin Live that they have recently introduced a series of measures to combat anti-social behaviour and violence towards staff.
He said: "Any acts or threat of violence towards our employees are condemned by Iarnrod Eireann, and no worker in any industry should experience this. In all instances, we will work with Gardaí to bring the perpetrators to justice."
He said Irish Rail have introduced multiple measures to combat anti-social behaviour, including increasing their security resources from €3.7m in 2016 to €5.7m in 2021. The rail network also said they have strengthened their work with gardai and established joint protocols particularly on the DART, Heuston commuter and Cork routes.
The spokesman added that a dedicated security monitoring centre for the Greater Dublin Area has been established as well as a DART text alert line to report incidents of anti social behaviour.
Alcohol is prohibited on services until further notice. The spokesman said that Irish Rail "work directly with employees and trade unions through local forums to identify issues of concern and address these with the support of Gardaí and our security teams."
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