![This traffic sign warns that there is a curve to the left ahead. It may be necessary for drivers to reduce their speed significantly, especially when they can’t see how sharp the curve is. Curves which come after a long straight section, or which are very different from other curves on the road, are particularly dangerous. Warning for a curve to the left.](/img/europe/at/signs/warning/warning-curve-left.png)
Warning for a curve to the left.
![This traffic sign warns that there is a double curve ahead, first to the left and then to the right. It may be necessary for drivers to reduce their speed significantly, especially when they can’t see how sharp the curves are. This traffic sign is only used where the first curve is right behind the second. Warning for a double curve, first left then right.](/img/europe/at/signs/warning/warning-curve-left-right.png)
Warning for a double curve, first left then right.
![This traffic sign warns that there is a curve to the right ahead. It may be necessary for drivers to reduce their speed significantly, especially when they can’t see how sharp the curve is. Curves which come after a long straight section, or which are very different from other curves on the road, are particularly dangerous. Warning for a curve to the right.](/img/europe/at/signs/warning/warning-curve-right.png)
Warning for a curve to the right.
![This traffic sign warns that there is a double curve ahead, first to the right and then to the left. It may be necessary for drivers to reduce their speed significantly, especially when they can’t see how sharp the curves are. This traffic sign is only used where the first curve is right behind the second. Warning for a double curve, first right then left.](/img/europe/at/signs/warning/warning-curve-right-left.png)
Warning for a double curve, first right then left.
![This traffic sign warns for a road narrowing, the width of the road ahead will suddenly become smaller from the left. Warning for a road narrowing on the left.](/img/europe/at/signs/warning/warning-road-narrowing-left.png)
Warning for a road narrowing on the left.
![This traffic sign warns for a road narrowing, the width of the road ahead will suddenly become smaller from the right. Warning for a road narrowing on the right.](/img/europe/at/signs/warning/warning-road-narrowing-right.png)
Warning for a road narrowing on the right.