Chennai International Airport (airport code MAA) is located in Tirusulam, India, about 12 kilometers southwest of Chennai, India's 4th largest city. It is the 3rd busiest airport in India handling some 10.5 million passengers. Chennai has two passenger terminals, Kamaraj Terminal for domestic travelers and Anna Terminal for international travelers. A third terminal handles cargo. A new domestic terminal is being built next to the existing one while Anna Terminal is undergoing expansion. Sometimes still referred by its former name, Madras Airport, Chennai is served by five domestic and 26 international air carriers. Suburban Rail Service provides transport into the city and is connected by underground passage to the airport.