This story has been updated.
A pair of separate crashes resulted in gridlock on the Tappan Zee Bridge span during the Monday morning commute on northbound I-87 heading toward Rockland.
The first crash blocked the left lane on the span. After that lane reopened, a new crash took out the right lane just before 8 a.m.
Delays of 30 minutes were the norm during the height of the morning commute.
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