Organisers of the Pope's visit have moved to allay people's fears over the logistical challenges in getting to see the pontiff.
Half a million people are expected to attend the Papal Mass in Dublin's Phoenix Park and a further 250,000 people will be attending events at the RDS, Croke Park and Knock.
In total, there will be 1,600 stewards to assist attendees on the day, 1,000 of whom will be positioned inside the park itself and 600 lining the routes into the location.
Some 7,000 volunteers are also helping people get to and from the Mass.
More than 1,000 medical providers will be on duty and there will be 26 aid posts in place along the numerous pedestrian routes and within Phoenix Park.
People attending the event are being urged to use public transport.