City officials say it is unclear how many construction projects were stopped as a result of the mayor's request. A spokeswoman for the mayor's office tells GlobeSt.com that the he asked for the construction shutdown Tuesday, shortly after a portion of the tunnel's roof collapsed, crushing a car and killing Milena Del Valle.
Officials with the Big Dig say they have found at least 60 tunnel defects and closed down a section of the roadway, which links Interstate 90 to the Ted Williams Tunnel, until investigators finished collecting evidence in the cause of the disaster.
It was unclear when the highway would reopen, Big Dig head Matthew Amorello says. An investigation into Boston's entire highway infrastructure inside Route 128 is being conducted, he adds.
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