Here's why:

* New road: Road construction often involves cutting into slopes, changing the natural stability of the hillside.

* Rock and soil move down slope: This is the hallmark of a landslide, where the weight of the material exceeds the strength of the slope, causing it to move downhill.

Types of slope failures:

* Rockfall: Loose rocks break off and fall down a steep slope.

* Slides: Large masses of rock or soil move downslope along a defined plane.

* Flows: Saturated soil or rock moves like a viscous fluid.

Contributing factors:

* Slope steepness: Steeper slopes are more prone to failure.

* Rainfall: Water saturates the ground, reducing its strength and making it more prone to movement.

* Road construction: Excavation, blasting, and changes in drainage patterns can destabilize slopes.

Consequences:

* Damage to infrastructure: Roads, buildings, and other structures can be damaged or destroyed.

* Injuries or fatalities: People can be injured or killed by falling rocks or debris.

* Environmental damage: Landslides can disrupt ecosystems, pollute water sources, and cause soil erosion.

Important Note: If you see signs of a potential landslide, it's important to contact the appropriate authorities immediately.