Define “stop line”:

1. Correct answer: A line drawn on either full or half width across the road marking a stopping point for vehicles.
2. A line along the road, marking the point in which a vehicle must stop, in junctions with traffic lights only.
3. A line along the road, marking the point in which a vehicle must stop, before a railway crossing
4. A junction-line along the road, either full or partial, marking the point in which a vehicle must stop near a pavement

WhyA stop line runs across the roadway and shows where to stop when you must stop: at a light, a 'Stop' sign or before a level crossing. Lines along the road are other markings.