An emergency meeting is being called for with the CEO of Dublin City Council as concerns mount around delays to the Dublin City Centre Transport Plan.
The Dublin Commuter Coalition along with other groups has written to Richard Shakespeare demanding a meeting to express concerns in relation to possible delays.
The group says all possible consultation has taken place and is calling for the transport plan to be implemented in full and on time.
The plan will see cars banned from a range of new areas in the city – with space given over to pedestrians, cyclists and public transport instead.
It includes removing traffic from the College Green area and pedestrianising Parliament Street.
Sections of quays on both sides of the river will be given over to cyclists, pedestrians and public transport – with new civic plazas at the Custom House and Lincoln Place.
The transport plan is due to come into effect in August.
Minister of State for Business, Employment and Retail Emer Higgins has called for the Dublin City Transport Plan to be delayed until at least 2025.
Dublin Commuter Coalition Chairperson Jason Cullen said there is no reason why it should be further delayed.
"The project has gone through quite a significant consultation process," he said,
"It has support from the Minister for Transport, it has support from the governance group of Dublin City Council and indeed the Council themselves.
"We've gone through the full process; all of the questions should have been asked and answered at this stage.
"It's time to roll it out on time and in full."
Speaking over the weekend, Transport Minister Eamon Ryan warned it has already been delayed too long.