12 Countries Have Built Roads Out of Plastic â And They Can Perform As Well or Better Than Asphalt Mar 11, 2021 Asphalt with the additive TonerPlas, made from mixed soft plastics, is used to resurface a roadway in Fremantle, Western Australia, in 2020/Close The Loop This article first appeared in Yale Environment 360 and is re-printed with permission. A road running through Accra, Ghanaâs capital, looks like any other blacktop. Yet what most drivers donât realize is that the asphalt under them contains a slurry of used plasticsâshredded and melted bags, bottles, and snack wrapsâthat otherwise were destined for a landfill.