Carrigaline based councillors have called for work on the construction of the Western Relief Road in the town to begin as soon as possible with the design stage having commenced.
The relief road is expected to be ready for construction in quarter two of 2018 when designs are completed.
Engineering and project management company Atkins signed a contract to complete the design in May but local councillors have said traffic is getting worse weekly.
The relief road is to be located a short distance west of Carrigaline Main Street and it is hoped it will allow traffic to bypass the town centre and allow for further development.
Census 2016 figures showed that Carrigaline is the fastest growing town in the county, ahead of Cobh, and its congested Main Street carries up to 15,000 vehicles a day.
Cllr Seamus McGrath (FF) said that traffic was “worsening by the day” and momentum must be kept going on the project.
“It’s welcome progress that we have consultants appointed for the detailed design scheme,” he said.
“I do have to point out that traffic in the area is worsening on a week to week basis and it is becoming a serious issue. We have to keep the momentum going in relation to the relief road.
“It is by no means the solution to all our problems but it will make a big difference in relation to the traffic in Carrigaline.
“I would ask that the detailed design phase goes as quickly as possible,” he added.
Mr McGrath said the project was necessary if Carrigaline is to continue to develop and added the volume of traffic was affecting the quality of life of residents.
Cllr John A Collins (FG) said new housing developments in the town were going to add to already high traffic levels and works must begin on the relief road as soon as possible.
“It was 1986 when [the Western Relief Road] was first mentioned, 31 years later, we are getting to the design stage. Maybe, it might progress during the term of this council,” he said.
He added that the completion 200 houses on the south side of the town would “exacerbate what is already an appalling situation” in relation to traffic issues.
“Proposals have been made to widen a number of roads particularly the Bothar Guidel Road to allow traffic on the south side to access the north. The sooner something is done, the better,” Mr Collins added.