http://timesofindia.indiatimes.com/...-handling-air-traffic/articleshow/6221163.cms MUMBAI: City's Chatrapati Shivaji International airport has been ranked fourth among airports in the world that handle more than 15 million passengers per annum. Overall, it was ranked 23rd among 146 airports. The quarterly Airports Quality Survey survey was conducted by the Airports Council International, an autonomous body, to measure passengers' perception and response to quality of facilities at airports, connectivity within airports, service delivery standards and airport service efficiency. Mumbai scored above Delhi's Indira Gandhi International airport to be the best in the country. Globally, it was ranked below Gimpo Airport (Seoul) and the airports at Vancouver and Taipei. It ranked better than Shenzhen (China) and San Francisco and Zurich. About 1,500 passengers from Mumbai airport participated in the survey.