Where:
On any road, but most commonly in mountainous or hilly areas where the road begins to rise sharply uphill.

Purpose:
To warn drivers that they are approaching a section of road with a steep incline.
Such areas can affect vehicle performance, especially for heavily laden or underpowered vehicles, which may slow down significantly while climbing.
The sign also alerts drivers to potential hazards associated with reduced visibility around curves, slower traffic, or vehicles that may roll backward when starting on an incline.

Action:
Approach the ascent with caution and adjust your speed before the climb.
Be alert for slow-moving or heavy vehicles ahead and maintain a safe following distance to allow for changes in speed.
Use a lower gear to maintain steady power and control throughout the climb.
Avoid overtaking on blind curves or steep sections, and be prepared for reduced acceleration.
Always drive carefully, particularly in mountainous regions where sharp bends, narrow lanes, or oncoming traffic may further challenge your control of the vehicle.