A further ten Dublin Bus routes are to be diverted from College Green because of ongoing congestion since the introduction of the Cross City Luas.
The National Transport Authority said the rerouting is coming into effect on 5 March.
It is in addition to the 17 routes taken out of College Green last month.
In a statement the NTA said: "Following a period of monitoring, further changes will be implemented to cater for the increase in the number of longer trams that will come on stream over the coming weeks and for the higher pedestrian volumes that will arise in College Green as we move into the tourist season - this will require more signal time to be devoted to pedestrian crossing movement."
The second longer 55-metre Luas tram began service this morning.
Transdev plans to have seven in service by the end of the next month.
The latest move means that a total of 30% of Dublin buses have now been removed from College Green.
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Conor Faughnan of the AA said that buses will have to be taken out of the area completely.
He said: "The tracks are down nobody is going to pull them up again. I think we have to face facts and accept that the buses are going to have to be taken out of there."
In a statement, Dublin Bus said it would "continue to work with Dublin City Council and the National Transport Authority on solutions to alleviate delays being experienced by our customers."
"Any further solutions proposed must involve all transport modes which operate in the city centre and must have a balanced approach", it added.
The latest bus changes are:
- Route 4 northbound to reroute via Tara Street Burgh Quay (Morning peak only)
- Route 7, 7b, 7d northbound to reroute via Tara Street Burgh Quay (Morning peak only)
- Route 145 northbound to reroute via Tara Street to Heuston
- Route 84X northbound to reroute via Tara Street towards Eden Quay
- Route 116 northbound to reroute via Tara Street Burgh Quay
- Route 118 northbound to reroute via Tara Street towards Eden Quay
- Route 120 southbound to reroute Hawkins Street, Townsend Street, Merrion Square (Peak only)
- Route 44 southbound to reroute via Abbey Street, Hawkins Street
- Route 51D southbound to reroute Hawkins Street, Townsend Street, Merrion Square
- Route 142 southbound to reroute Hawkins Street, Townsend Street, Merrion Square
Dáil debates Dublin congestion
The Dáil has begun debating a Fianna Fáil motion on the current traffic congestion in Dublin.
It calls for short to medium-term policy changes to address the situation.
Dublin TD John Lahart put forward the motion saying that Dublin Bus journey times have increased by 110% in the last three months.
Mr Lahart said the National Development Plan offered nothing to commuters in the short-term.
However, Minister for Transport Shane Ross rejected the assertion in the motion that there was a lack of forward planning to allow for the introduction of Luas Cross City.
He said: "The College Green civic plaza proposal is currently with An Bord Pleanála for determination and, if approved, will remove a lot of the conflicting traffic movements that currently exist in College Green.
"This is an independent process and we must await the outcome of that process."
Sinn Féin's Imelda Munster said Luas trams were currently overcrowded causing delays and she questioned whether sufficient planning was carried out.