How will 150,000 people move in and out?

Reading about congregating 150,000 people in one area just brings about one important question. How will 150,000 people get to the place and leave the place, especially with our "world class" public transport system?

Organizing celebrations at only one area is old school. All the newer celebrations are separated out into different areas because the planners know of the big strain on the public transport system. Even the countries organizing the Olympics also know this basic concept. 

I look forward to see how are they going to resolve this issue.