Fri 06 Jun 2004City council blames Luas test run for Dublin traffic congestionDublin City Council has backed Dublin Bus and blamed Luas for breaching agreed protocols and causing last Tuesday morning's unusually bad traffic congestion in Dublin City Centre.The city council's director of traffic, Mr Owen Keegan, has said he was "certain, absolutely satisfied, that there was a major problem with the operation of the signals due to Luas".