Sydney is to stage a trial Olympic Games nine months before the sporting showcase in 2000 in an attempt to avoid security and transport problems experienced at Atlanta. 'We've got to give ourselves enough time so that we can make any fine-tuning necessary before the event. We are confident we will be able to put together a programme that will be exciting enough to attract the crowds needed for a dress rehearsal,' New South Wales Premier Bob Carr said yesterday. His pledge comes amid concerns in Australia about Sydney's ability to deal with the influx of visitors after Atlanta's experience, where the city's transport system and security arrangements failed to cope. More than 630,000 people are expected to visit Sydney for the Olympics - 150,000 from overseas. Olympic chief Juan Antonio Samaranch said yesterday he would set up a special working group to liaise with Australian officials after admitting there had not been enough meetings with Atlanta organisers. Hundreds of Australian executives, tourism officials and government ministers flew to the Atlanta Olympics to see how they were organised, and will meet during the next few weeks to draw up a plan of action for Sydney. Australian organiser Kevan Gosper, a vice-president of the International Olympic Committee, said yesterday that control of security for the Sydney Games should be handled by one authority, unlike in Atlanta where it was divided among several agencies. The Olympics are expected to create 150,000 jobs and give Australia an economic boost of A$7.3 billion (HK$43.5 billion).