A woman is dead after authorities say she drove the wrong way along Interstate 4 near Orlando.

The Florida Highway Patrol says 58-year-old Gloria Marcial of Polk City died early Wednesday, hours after she drove westbound in the eastbound lanes of the interstate for at least five miles, causing three separate crashes.

Authorities say they don't know why she was driving the wrong way. She crashed her Chevrolet into a Ford pickup truck driven by 73-year-old Ralph Walker. Both drivers were taken to a hospital, where Marcial died early Wednesday. Walker was listed in serious condition.