What does a warning sign indicating a curve in the road generally show?

A warning sign indicating a curve in the road provides essential information to drivers about upcoming changes in the road's alignment. These signs are typically designed to alert drivers to slow down and navigate the curve safely. When the sign specifically indicates that the road curves first in one direction and then in another, it prepares the driver for a more complex adjustment in their steering and speed.

In instances where the road curves sharply in one direction, such as purely left or purely right, the sign would be more explicit about that single direction change. However, when a sign suggests that the road curves first in one direction and then in another, it indicates that the driver should remain cautious as they may need to adjust their trajectory multiple times rather than just straightening out after one turn. This kind of warning is particularly important for ensuring the safety and smooth operation of vehicles traveling through more intricate road layouts.