In what case do the rules not require a warning signal to be given?
Before stopping at the edge of the roadway.
Before a curve of the road marked with a "Dangerous Turn" sign.✓Bonne réponse
Before converting to an adjacent traffic lane.
Explication
Following a bend in the roadway without changing lanes is not itself a maneuver that requires a direction warning, even when the bend carries a dangerous-turn sign. Moving into another lane or pulling over to stop changes the vehicle's course or position and therefore requires advance signalling.