Paved with Good Intentions?

An Indian Chemistry Professor, Rajagopalan Vasudevan, has apparently successfully added discarded plastic to the bitumen/gravel mix that is routinely used to surface roads (https://www.theguardian.com/world/2018/jul/09/the-man-who-paves-indias-roads-with-old-plastic). The addition of the plastic appears to make the roads more durable and less likely to develop potholes. Professor Vasudevan is apparently an enthusiast for plastics as he claims they are especially useful to poor people. Although the plastics do not attain temperatures where they would emit toxic fumes (this was a concern), some experts have warned that not all types of plastic are suitable for adding to road surface mixtures.