Emergency crews respond to a single-vehicle rollover crash at Green Bay Road and Keith Avenue in unincorporated Waukegan Monday afternoon | Photo provided to Lake and McHenry County Scanner.

A Wisconsin man is in critical condition after his van struck a tree and a utility pole and then rolled over in unincorporated Waukegan Monday afternoon, police said.

The Lake County Sheriff’s Office and Gurnee Fire Department responded around 12:50 p.m. Monday to Green Bay Road and Keith Avenue in Waukegan Township for a single-vehicle crash with injuries.

Lake County Sheriff Spokesman Sgt. Christopher Covelli said that a 2006 Ford Econoline was traveling northbound on Green Bay Road approaching Keith Avenue.

The Ford, driven by a 52-year-old Kenosha, Wisconsin man, crossed into the southbound lanes of traffic, struck the curb, a tree, and a utility pole. The vehicle rolled onto its side before coming to a rest.

Emergency crews found the driver laying partially outside of the van. It is unknown if he was partially ejected in the crash or crawled out of the wreckage, Covelli said.

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The man, who was the sole occupant in the vehicle, was transported to Advocate Condell Medical Center in Libertyville with critical injuries.

The crash remains under investigation by the Lake County Sheriff’s Office Technical Crash Investigations Unit.