An inquiry has found a woman endured "almost incomprehensible" suffering for three days.
Lamara Bell, who was 25, lay injured beside her dead boyfriend following a car crash.
She passed away in hospital.
28-year-old John Yuill died after their vehicle left the M9 near Stirling in July 2015.
An investigation's found "organisational failure" in call handling by Police Scotland meant they weren't found.
That's despite officers previously being alerted.