The O-P-P say a woman has died after her motorcycle crashed into a car that was stopped in the westbound lanes of Highway 401 near Ingersoll.
The accident happened Friday afternoon, and police say it caused a chain reaction where three other vehicles were rear-ended.
The motorcycle rider was rushed to hospital, but police say she was later pronounced dead.
Her name was being withheld pending notification of next of kin.
No one else was seriously injured.