Apple's Cupertino campus, located at 1 Infinite Loop in Cupertino, California, acts as its corporate headquarters and comprises roughly 850,000 square feet of office and lab space. In 2006, Steve Jobs announced Apple would be building a second Cupertino campus. Construction was originally supposed to be finished by 2015, but delays pushed the initial groundbreaking from 2013 to 2014.
Now an updated schedule on Cupertino.org is showing the project is expected to be finished by the end of 2016. Cupertino's website regularly updates with information about how the development of the second Apple campus will affect traffic in the city. You can see the current schedule below: