People living in an area of Sligo town fear the construction of a new bridge across the Garavogue River will result in heavy goods vehicles going through their residential localities.
Councillors Declan Bree, Sinead Maguire and Chris MacManus told a council meeting it was a matter of concern in the areas.
The new bridge, one of the largest infrastructure projects to be built in Sligo town for some time, will go to tender in the third quarter of this year, with construction expected to start next year.
Councillors were told there had been extensive consultation with residents and that their concerns would be kept to the forefront.
Council CEO Ciaran Hayes said bye-laws were premature at this stage because the council did not know the consequences the laws were meant to deal with.
He said the difficulty in bringing in bye-laws now was that the impact of the bridge was not known until traffic flow was monitored afterwards.
But Cllr Bree said residents in Cranmore, Martin Savage Terrace, Doorly Park and Cleveragh were concerned.
The cathaoirleach of Sligo County Council says noise pollution is a major concern for residents in the area around where a new bridge is to be built in Sligo town.
Cllr MacSharry, a solicitor, recalled that noise pollution was a top concern when he represented residents some years ago during an oral hearing on the new bridge across the Garavogue, work on which is expected to start next year.