Why can’t more projects be as fast as I-95?

After a portion of I-95 collapsed on June 11, many thought it would take months to reopen. Well, months turned into 12 days. Why were crews able to rebuild so quickly? What went into rebuilding? And, why can’t other projects be done as swiftly? Dr. Tripp Shenton is a professor of Civil and Environmental Engineering at the University of Delaware. He explains the process of rebuilding I-95 and why it was easier and faster than other projects.