Donegal County Council is to be asked to reexamine the traffic lights on the Pearse Road and Justice Walsh amid complaints from motorists.
There are suggestions that the intervals are not in line with traffic flow and causing traffic jams.
Cllr Michael McBride said motorists are complaining of “great tailbacks” on the Pearse Road since the lights became operational.
The matter is set to be raised with the local authority at an upcoming meeting of the Letterkenny-Milford MD on Tuesday.