Approaching a bend you meet two signs on the same stretch: an upright red-bordered triangle showing a curve, and a red-bordered circle with a red slash over an overtaking symbol. What do they require of you?

1. Both are advisory suggestions that carry no legal force
2. The triangle warns you of the bend ahead; the circle legally prohibits overtaking on that stretch
3. The triangle prohibits taking the bend; the circle warns that others may overtake you
4. Both signs prohibit you from entering the road