Bengaluru: As India opens up to civilian drone usage with new rules approved recently, a team of researchers at the Indian Institute of Science (IISc) is working on drone skyways — a framework for efficient and safe movement for multiple unmanned aerial vehicles (UAVs) or drones in urban or delimited airspace, which is also called Class G airspace.Given the challenges of organising timely delivery of medicines or organs for transplantation in a crowded city or making other commercial deliveries, the government and the private sector are both looking to leverage drones. Just this week, the government employed one such UAV to deliver vaccines in northeast India.