Which visual cues do drivers use to anticipate and slow down in freeway curve approach? An eye-tracking, think-aloud on-road study

•An on road study aimed to investigate look-ahead fixations in curve approach.•31 participants drove through curves, wearing an eye-tracker and verbalising speed.•Focus of Expansion and parallel edges provide important cues to start decelerating.•Speed and warning signs are mostly used as a confirmation for speed reduction.