Give scientific reasons: Polymer-modified bitumen is an important material for road construction.

(N/A) The use of plastic waste in road construction materials offers several significant advantages.
$1$. These roads exhibit much higher durability and strength compared to conventional roads.
$2$. They are highly resistant to the formation of potholes caused by rainwater.
$3$. They show reduced bleeding or softening during hot summer temperatures.
$4$. Mixing plastic waste with bitumen reduces the overall quantity of bitumen required,thereby lowering the construction cost and promoting the recycling of waste plastics.