A group of Dublin businesses say they are still opposed to a compromise plan on car restrictions in the city centre ahead of the Cross City Luas.
Dublin City Council had planned to make Eden Quay public transport only but has since agreed to allow one lane for cars.
However, Keith Gavin of the Irish Parking Association told a meeting of the council's transport committee that he was disappointed that the council would not carry out an Environmental Impact Assessment.
Mr Gavin, who also represents the Dublin For All group of local businesses, said he had been "overwhelmed" by the level of concern among groups including hotels, hospitality, entertainment and residents who have "serious genuine concerns" about this plan.
The group has threatened High Court action over the plan.
Council head of technical services Brendan O'Brien said the plan involved putting in bus lanes and Environmental Impact Assesments are not required.
He said consultants had confirmed this.
The plan involves double bus lanes on sections of the quays with cars restricted to one lane.
Cars would not be allowed to turn right onto O'Connell Bridge because of the disruption to buses, but they would able able to turn left onto O'Connell Street with one lane available straight onto Eden Quay.
With the Luas Cross City passing every three minutes over O'Connell Bridge at peak times the council says it is not sure access onto Eden Quay would be feasible and that the operation will have to be monitored.
The new traffic plan is due to come into operation in August in time for test running of the new Luas line.
Read the consultation report to the transport committee here: North and South Quays Traffic Management Measures Report on Non Statutory Consultation May 2017
