Labour has made a complaint to the Judicial Council in relation to Judge James O'Donohoe's comments about cyclists.
Judge O'Donohoe said in the Circuit Civil Court that "cyclists had become a nightmare in Dublin".
He was hearing a case on a cyclist who had suffered a brain injury when he and a motorbike collided.
Judge O'Donohoe reduced the €50,000 damages award given to the cyclist by 80%.
Labour transport spokesperson Ciarán Ahern said the statement that cyclists had become a nightmare was "untrue, unfair and frankly ignorant".
"The commentary by Judge James O'Donohoe is deeply problematic and has exhibited a clear perception of bias against cyclists in his decision-making.
"These comments were beyond what was necessary to determine the matter before the court, and what’s more, they have opened the floodgates around negative, uninformed remarks about cyclists," he said.
He said being a cyclist was often a nightmare with a lack of safe, segregated cycle lanes, dangerous junctions and poor lighting.
Mr Ahern said 14 cyclists were killed on the roads in 2025, the highest number of cyclists lives lost since 2017.
He said the judge's decision included remarks that generalised negatively about cyclists as a reckless category of road users, rather than confining his analysis strictly to the facts and evidence of the individual case.
"It appears that Judge O’Donohoe may be unable to make an unbiased decision in relation to a category of road users to which he has expressed such disdain.
"I have formally submitted a complaint to the Judicial Council on this matter, and have asked that considerations be given to encourage Judge O’Donohoe to engage with the families of the 45 cyclist fatalities on our roads over the last five years to understand properly the many and serious risks associated with cycling in Ireland," Mr Ahern added.
