Actually, Boston's infamous Big Dig project used so called "fast track construction," wherein construction on earlier segments was started before the design of

Actually, Boston's infamous Big Dig project used so called "fast track construction," wherein construction on earlier segments was started before the design of later segments was finished[1]. This required frequent modifications of already-constructed segments, and it's unclear how beneficial this methodology was in the end. [1] http://www.nap.edu/openbook.php?record_id=10629&page=16 http://www.nap.edu/openbook.php?record_id=10629&page=16