The Sumner County Sheriff's Office is investigating an accident that happened around 8 a.m. near Portland on Saturday.
The accident happened on Highway 109 after a collision between a tractor trailer and a Chevy Impala.
The driver of the Chevy Impala, Stephanie Law, 43, of Portland lost control of her vehicle as she traveled north on Highway 109.
Law's vehicle crossed the divided median, striking a Big G Express tractor trailer in the rear.
Law died at the scene as a result of her injuries.
The tractor trailer was driven by employee Brady Adkinson, 40, of Sparta and was not injured.
Both drivers were wearing their safety belts.