There are expected to be 10,000 more vehicles on the roads

An estimated 72,000 fans are anticipated to make their way to the capital for the match.

Many more are expected to watch the game in the pubs in the city.

Extra trains and planes have been put on to cope with the numbers and traffic organisations are urging motorists to allow plenty of time.

The AA estimate that that an extra 10,000 vehicles are expected to be heading towards Cardiff on Saturday.

Motorists have been warned to expect problems around junction 24 on the M4.

I think the gridlock is likely to occur at junction 24, the Coldra AA Spokeswoman

"This year it won't be so bad because Manchester United fans come from all over the UK," said a spokeswoman for the organisation.

"I think the gridlock is likely to occur at junction 24, the Coldra.

"The weather is going to be nice this weekend and as well as people travelling to the football, many will be heading to the coast.

"It's thought that many people are expected to set off pretty early and around midday is expected to be the peak time on the roads," she said.

She urged people to make sure they carried out checks on their vehicles before travelling after a 33% increase of breakdowns than normal in the Cardiff area on Cup Final day last year.

Chartered flights

As well as using the roads and rail networks, fans are also expected to fly to the city for the match.

The London trains are all fully booked now, but there is still room on the Manchester trains Arriva trains spokesman

Six chartered flights and about 30 executive jets will be arriving in Cardiff International Airport on Saturday especially for the FA Cup Final.

About 1,000 Manchester United fans and 230 Millwall supporters will be flying to the city for the game.

An estimated 30 coaches will be used to transport the fans from the airport to the stadium.

However, Russ Clements the head of operations at the airport said they had seen busier football matches.

When the Carling Cup Final was held in February between Middlesbrough and Bolton, 2,000 Middlesbrough fans touched down at the airport.

Extra trains have been put on to cope with the amount of people travelling in and out of the city on Saturday.

A spokesman for Arriva trains said that 20,000 people are expected to pass through Cardiff Central station.

Fans at last year's final were praised for their behaviour, with only three arrests.

"The London trains are all fully booked now, but there is still room on the Manchester trains," he said.

"There will be a queuing system at Cardiff Central and anyone who is travelling into the city who is not going to the football should think about planning their journey around the match to avoid too much disruption," he added.

And South Wales Police have also warned fans heading to the city to set off early.

"Make early plans for travel and get to the Millennium Stadium in plenty of time," said Chief Superintendent Jeff Cooksley.

"This is the fourth year that the FA Cup Final has been hosted in Cardiff and previous years have shown that fans setting off early for the Welsh capital is the key to ensuring an efficient traffic plan.