A long list of bus diversions has been published on the Dublin Bus website, with some restrictions to Luas red line services also in place
Today is the first of four days of security cordons around Dublin City for two major meetings of world leaders this week.
A major policing and security operation will be in place until Friday, as European leaders meet in the capital as part of Ireland's EU Presidency.
Barriers have been erected on North Wall Quay, with more due to arrive for the area from John Rogerson's Quay to Merrion Square in the coming days.
Another security zone will be in place around the National Gallery from Wednesday morning.
A long list of bus diversions has been published on the Dublin Bus website, with some restrictions to Luas red line services also in place.
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