A 42-year-old woman has died after a hit and run in Wudinna last week.
Just before 8pm on Saturday night, police were called to the Eyre Highway after reports a pedestrian was hit by a road train.
The truck failed to stop at the scene, and a second truck travelled past a short time later.
The woman was flown to the Royal Adelaide Hospital with critical injuries, and passed away on Wednesday.
Her death marks the 58th loss of life on SA roads compared to 33 at the same time last year.
Police are appealing for both truck drivers to come forward, or any other witnesses with information.