The accident happened before rush hour Wednesday on the westbound side of the Long Island Expressway just past the Cross Island Parkway.
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News Copter 7 was overhead the crash, where it appeared that the tractor trailer rear-ended a pickup truck that had an office trailer attached to it.
All westbound lanes were blocked except for the right lane, causing bumper to bumper delays back into Nassau County.
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This is a developing story. Check back for updates.
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