Retailers are increasingly concerned about the impact of the strike at Dublin Bus which is in its fifth day.
Representative body, Dublin Town says if more transport unions join the strike, job losses and shop closures are expected.
Unions representing staff at Dublin Bus say the Transport Minister should step in, or step down.
Today is the fifth strike day, with another tomorrow - and 13 more after that.
There are also fears of an all out strike at Bus Eireann, and workers at Iarnrod Eireann are watching developments at CIE closely.