Question

why metalled roads called all weather roads .?​

Answer 1

Metalled roads are made of cement, concrete or even bitumen of local .

They do not go out of use in the rainy season . Therefore, they are called all weather roads .

Thanks

Answer 2

Answer:

Explanation    Metalled roads are made of either cement, concrete or even bitumen of coal therefore durable over unmetalled road. Unmetalled roads go out of use in rainy season. Border roads plays in important role in connecting strategically important difficult areas and helps in the economic development of the area