What is the correct course of action in this situation?

You answered correctly by choosing to reduce your speed and avoid jerky steering movements. The warning sign on the right side of the road indicates the risk of icy or slippery conditions. In such situations, it's important to slow down and drive smoothly, avoiding sudden steering or braking, as these maneuvers can cause your vehicle to skid. Braking hard on a bend, especially on a slippery road, increases the risk of losing control. Remember: gentle steering and moderate speed are key to staying safe in icy or slippery curves.