Public submissions have finished on introducing a default speed limit of 30km/h in Dublin.

A campaign to lower the limit has provoked a backlash from some residents groups and there is also growing opposition to cycle lanes being brought in as part of a Covid-19 mobility plan.

Griffith Avenue in Marino is one area where both proposed changes have provoked controversy.

Local councillors objected to a default 30km/h speed limit and Griffith Avenue is one of a number of roads in Marino, Glasnevin and Artane being considered for a 40km/h limit outside school hours.

Dublin City Council chief executive Owen Keegan has acknowledged that he believes the council's public consultation, run in conjunction with a 'Love 30' campaign, was one sided. It remains to be seen how the results of the public consultation will be handled.

Councillor Damian O'Farrell says that one of the deficiencies of the consultation was that it failed to refer to evidence that unrealistically low speed limits can be counterproductive and lead to drivers ignoring limits altogether.

He believes that most submissions will be against 30km/h as the default limit which would apply even to main arterial routes like Clontarf Road and Dorset St.

Meanwhile, a new group, the Cycle Lane Action Group, has formed made up of 19 residents and disability groups all over the city who are concerned about the way Covid Mobility measures are being applied mainly involving giving over road space to cyclists and pedestrians.

Paul Sheridan from Griffith Avenue believes there will be "chaos" when the Eastern section of Griffith Avenue is reduced to one lane either way for cars and parking spaces are given over for an on-street cycle lanes.

He points out that the area is also subject to separate Bus Connects planning as well as proposed new speed limits and he wants a new integrated plan instead involving more consultation.

But Councillor Donna Cooney (Green) says lower speeds save lives saying the fatality rate for pedestrians can be reduced by 80% if motorists travel at 30km/h instead of 50. She said that vulnerable cyclists such as the elderly and children also need segregation.

And Kevin Baker of the Dublin Cycling Campaign said if more people cycled or walked they would leave the roads to those who really needed to drive.

The results of the public consultation on the 30km/p limit will be known at the end of next month while the High Court is due to hear a challenge by Sandymount residents against the Strand Road cycleway in June.