A 27-year-old twin sister from Porthleven died after being hit by a car on the A30 as she ignored desperate pleas for her to stop walking in the middle of the carriageway.
Penelope Harris, who previously lived in Penzance, died instantly about half a mile west of Roseworthy dip near Camborne, an inquest in Truro was told.
An acquaintance she was with was receiving breakdown assistance on the westbound side of the A30 when the crash took place in darkness shortly after 10pm on May 12 last year.