Economy Delhi odd-even scheme starts on November 4: How the world's top cities tackle pollution, traffic woes Updated : September 20, 2019 06:04 PM IST Parking management and traffic control cameras help Barcelona tackle traffic congestion. Many companies look at drone technology to do tasks within a city, such as Amazon’s drone pilot programme. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.