For every 100 kg of tar used to build asphalt roads, 3 to 6 kg of plastic will be mixed in it, he said, adding materials like plastic carry bags, sacks, milk pouches, bin linings, cosmetic and detergent bottles, drinking water bottles, bottle caps, household articles will be used.

"Studies have revealed that plastics waste have great potential for use in bituminous construction as its addition in small doses, about 5-10 per cent by weight of bitumen, helps in substantially improving the Marshall stability, strength, fatigue life and other desirable properties of bituminous mix, leading to improved longevity and pavement performance," the guidelines by the Centre said.