Emergency personnel investigate a fatal accident near Exit 39 on...

Emergency personnel investigate a fatal accident near Exit 39 on the Northern State Parkway on Saturday, Feb. 15, 2014. Credit: Jim Staubitser

A Lake Grove man died in a single-vehicle crash Saturday morning while driving on the Northern State Parkway in Nassau County, State Police said.

Glenn Sullivan, 50, was driving a silver Infiniti westbound near Exit 39 at a "high rate of speed" when he lost control of his vehicle, which overturned before striking a tree at about 9:25 a.m., officers said.

He was pronounced dead at the scene.

State Police closed all westbound lanes of the parkway for about two hours as a result of the crash.

Get the latest news and more great videos at NewsdayTV Credit: Newsday

Gilgo Killer's life in jail ... How about those Knicks? ... HS plays of the week ... What's up on LI ... Get the latest news and more great videos at NewsdayTV

Get the latest news and more great videos at NewsdayTV Credit: Newsday

Gilgo Killer's life in jail ... How about those Knicks? ... HS plays of the week ... What's up on LI ... Get the latest news and more great videos at NewsdayTV

SUBSCRIBE

Unlimited Digital AccessOnly 25¢for 6 months

ACT NOWSALE ENDS SOON | CANCEL ANYTIME