Julia Delva Clarke, age 44, of Fairfield, was killed around 12:30 a.m., Monday, Aug. 21, in Westport, said the Connecticut State Police.
A preliminary investigation found that Clarke was traveling north in the right lane in a 2019 Porsche Macan when she ran into the back of a Freightliner Cascadia which was towing a Kenworth tanker, state police said.
State Police said Clarke was pronounced dead at the scene.
The driver of the tractor-trailer sustained suspected minor injuries.
The cause of the crash remains under investigation.
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