Simplify the following text for a Grade 9 native English-speaking person.
Original: The building officially opened on 4 January 2010 , and is part of the new 2 k flagship development called Downtown Dubai at the ` First Interchange ' along Sheikh Zayed Road , near Dubai 's main business district .
Simplified: The building is part of a 2km building project on Sheikh Zayed Road , Downtown Burj Khalifa near Dubai 's main business district .