Royal Welsh Show officials have held an emergency meeting after roads around Wales' main agricultural event became snarled up with traffic.
Talks were held between bus operators and traffic management staff to try to solve the problem, which plagued the event last year.
The show said a bus carrying visitors broke down in Builth Wells and brought morning traffic to a standstill.
Problems intensified when drivers drove into the town to find parking spaces.
The Royal Welsh Agricultural Society, which runs the event, had earlier urged visitors to use recommended routes and car parks in an attempt to avoid last year's "chaotic" traffic problems.
But show director Harry Fetherston-Haugh said some people had ignored the society's plea.
Trebor Edwards is a stockman, singer and this year's Royal Welsh Show president.
He added there had been complaints about the free park and ride bus service too.
There are 56 buses operating between the car parks and the showground, and officials said they may have hire more to cope with demand.
Society chief executive David Walters said Mr Fetherston-Haugh was talking to shuttle bus operators and the traffic management team.
"A bus broke down on the bridge in Builth Wells which caused choas and what made it worse was that an ambulance was trying to get through the traffic," Mr Walters explained.
"There is no forward parking for the general public so there is no point in driving to the showground."
Mr Fetherston-Haugh said the free park and ride service would get "visitors home a whole lot quicker at night".
'Stronger position'
Meanwhile, the first day of the event has been hailed a huge success.
The attendance was 51,360, 3,000 up on 2007 and 2,000 above the 10-year average for the first day.
A sleeping pig on the opening day of the Royal Welsh Show
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