Here are the announced details.
“The city announced Thursday street closures in the Loop during three weekends in July. Filming is set to begin July 10, but the first road closures will begin at 8 p.m. on Friday, July 9. The streets will reopen Monday, July 12 at 5 a.m.
LaSalle St. between Jackson and Randolph Washington between Wells and Clark Randolph between Wacker Drive and Wells.
The Michigan Ave. bridge over the Chicago River will be closed 8 p.m. Thursday, July 16 through 5 a.m. July 19.
The final road closure will occur 9 p.m. Sunday, July 18 through 5 a.m. Thursday, July 22 on Wacker Drive between Michigan Ave. and Wabash.”
The filming location as seen in The Dark Knight.
Transformers 3 comes to theaters July 1, 2011.