New Delhi, Sept. 12 -- In a significant move aimed at green infrastructure and sustainable urban governance, the Delhi Public Works Department (PWD) has issued a new directive mandating that arterial roads across the city be built or repaired using polymer modified bitumen. The order, issued last week states that all road works under PWD will henceforth be using polymer modified bitumen in place of normal viscosity grade bitumen. Officials said that with frequent road repair work being needed across various stretches, this move is aimed at improving the strength of roads. "Plastic or polymer will be used in road construction and repair work. This will enhance the durability of roads which will not require frequent repairs, and may also even...