All westbound lanes of the Long Island Expressway reopened at around 10:30 a.m. after they were closed before dawn because a tractor trailer had overturned, Nassau police said.

The crash occurred at around 4:07 a.m.

The large size of the vehicle is one reason the shutdown lasted so long, a police spokesman said.

A Newsday investigation revealed that Grumman Aerospace knew toxic chemicals were leaking into the ground in Bethpage. Newsday Associate Editor Paul LaRocco and Deputy Editor David Schwartz explain.  Credit: Newsday Studios

'It's depressing, it's frustrating' A Newsday investigation revealed that Grumman Aerospace knew toxic chemicals were leaking into the ground in Bethpage. Newsday Associate Editor Paul LaRocco and Deputy Editor David Schwartz explain.

A Newsday investigation revealed that Grumman Aerospace knew toxic chemicals were leaking into the ground in Bethpage. Newsday Associate Editor Paul LaRocco and Deputy Editor David Schwartz explain.  Credit: Newsday Studios

'It's depressing, it's frustrating' A Newsday investigation revealed that Grumman Aerospace knew toxic chemicals were leaking into the ground in Bethpage. Newsday Associate Editor Paul LaRocco and Deputy Editor David Schwartz explain.

SUBSCRIBE

Unlimited Digital AccessOnly 25¢for 6 months

ACT NOWSALE ENDS SOON | CANCEL ANYTIME