Nemkumar Bhantia, a professor in the Civil Engineering Department at University of British Columbia (UBC) in the Canada, has developed roads that are self-repairing and sustainable. Built used ultra high-strength concrete and special fibres developed at UBC, the first such road in Karnataka is not only cost-effective, but has greater longevity. Unlike the typical concrete road, in which cement is a key component, Banthia’s self-repairing road uses 60 % fly-ash and only 40 % cement. The fibres used have a hydrophilic nano-coating, which attract water in the event of rains. The water then becomes a key component in healing cracks. When a crack appears, this water gives hydration capability to the un-hydrated cement, and produces more silicates, which actually close the crack before they grow larger.