A major Hudson Valley road suddenly collapsed, impacting nearly 50,000 drivers. New York officials have just confirmed what caused it.

The New York State DOT determined what caused parts of the Saw Mill River Parkway to collapse.

Saw Mill River Parkway Collapse Causing Major Traffic Headaches loading...

A 12-inch drainage pipe on the Saw Mill River Parkway broke Sunday evening, creating a large sinkhole at Exit 13 in Hastings-on-Hudson.

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"While our investigation is ongoing, it appears this situation resulted from the deterioration of a 12 (inch) drainage pipe underneath the roadway. The deterioration was exacerbated by this weekend’

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