Caltrans is experimenting with using recycled plastic in pavement.  In a test project, California is adding melted recycled plastic to Hot Mix Asphalt.  Wouldn't that be wonderful if it turned out to be a win-win and we got better, more durable pavement while also finding a use for used plastics?  
https://www.sacbee.com/news/local/transportation/back-seat-driver/article244614807.html#:~:text=Back%2DSeat%20Driver-,Caltrans%20using%20old%20bottles%20to%20resurface,highway%20in%20eco%2Dfriendly%20trial&text=California%20is%20resurfacing%20a%20section,highway%20construction%2C%20Caltrans%20officials%20say.