Large numbers of people are expected to travel into, out of and around the country this bank holiday weekend.
A busy weekend is expected at airports in Dublin and Cork - where thousands will jet in for the Cork Jazz Festival and the Dublin City Marathon.
As usual, there's a packed sporting diary this weekend with GAA fixtures heading the list. A sample of the weekend's fare would be Leinster versus Connacht at Parnell Park on Saturday evening at 7.35pm where both sides will fight it out to reach the football final of the competition formerly known as the Railway Cup.
Limerick's Thomond Park will be the destination point for some 12,500 rugby fans for Munster's Heineken European Cup clash with Castres Olympique on Saturday evening.
Of course, festivals throughout the country will contribute to the traffic congestion. Most will make their way to Cork city where the Jazz Festival kicks off this evening.
Ireland's largest games convention takes place at Clontarf Castle where gamers from the UK, Mainland Europe, the USA, Canada and Israel will meet to test their gaming abilities against each other.
Over 1,000 musicians from 25 countries will entertain an estimated 40,000 fans in over 75 venues in the city which is Europe's Capital of Culture for 2005.
The Dublin City Marathon begins at 9am on Monday and to mark the weekend that's in it, over 10,000 runners, joggers and walkers will take part in fancy dress to raise money for the charity of their choice. Traffic disruption is expected in the south and north city until mid-afternoon on Monday.
More than 273,000 passengers are expected to travel through Dublin airport over the weekend, a 7 per cent increase on last year. It is expected that 42,300 passengers will pass through Cork airport, up 20 per cent.
With Halloween falling on Monday, Dublin Fire Brigade has called for children and parents to exercise caution around bonfires and fireworks.
The Automobile Association has joined the National Safety Council's Winter Safety Campaign "Arrive Alive" by warning motorists to think of safety first.
They have also called on vulnerable road users such as pedestrians and cyclists to take precautions and to take measures to ensure they are visible at night.
People should also remember that clocks go back one hour at 1am on Sunday morning.
