The accident happened before rush hour Wednesday on the westbound side of the Long Island Expressway just past the Cross Island Parkway.
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.
This is a developing story. Check back for updates.
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