Challenge: Indicating, brake lights and hazard lights

Almost every driving-lesson leaflet gives the same answer: 'about 30 metres, roughly 3 seconds.' The CBR exam designer knows you have picked up that number — and tests exactly whether you apply it blindly everywhere. The book has no seconds and no 30 metres. It gives three separate distances, one per road type. Once you know which distance belongs to which road type, you see through every '30m/3sec' trap.