Gopinath Bordoloi International Airport, in Borjhar, about west from the heart of the city. With all major domestic and international airlines flying into Guwahati, it is the eleventh busiest airport in India in total passenger traffic. Daily and weekly flights are available to Delhi, Mumbai, Kolkata, Chennai, Visakhapatnam, Bengaluru, Hyderabad, Ahmedabad, Lucknow, Jaipur, Kochi, Bangkok, Paro, Kathmandu etc. Rail The city of Guwahati and the northeastern region falls under the Northeast Frontier Railway (NFR) Zone of the Indian Railways, the headquarters of which is in Maligaon, near Nilachal Hills, in the northwest of the city. The Guwahati railway station, located in Paltan Bazaar area of Guwahati, is the busiest railway station of the city. It lies along the Barauni-Guwahati Line and Guwahati–Lumding section, categorised as an A-1 railway station under Lumding railway division. There are four more railway stations in the city – the Kamakhya Junction for passenger and freight services, the New Guwahati railway station (near Noonmati) for only freight services, Narangi railway station and Azara railway station. There are regular trains connecting Guwahati to and from other major cities of the country. Rajdhani Express, Poorvottar Sampark Kranti Express, Brahmaputra Mail, Kamrup Express, Northeast Express, Saraighat Express and Garib Rath are some significant trains running to and from Guwahati. The train with the longest route in India, Vivek Express, which runs from Dibrugarh in Upper Assam to Kanyakumari in the southern tip of India passes through Guwahati. Road The length of surfaced roads within the city is . National Highway 27 connects Guwahati with the states West Bengal, Bihar and rest of India. This highway connects Guwahati with Silchar in Barak Valley Assam and further connecting the city to the states of Meghalaya, Manipur, Mizoram and Tripura. National Highway 17 from Sevoke in West Bengal terminates in Jalukbari and connects Guwahati with the major cities of Dhubri and Cooch Behar. National Highway 15 and its several secondary roads runs through both the banks of River Brahmaputra and connects the Guwahati with the cities of Tezpur, Jorhat, Dibrugarh in Upper Assam and the states of Arunachal Pradesh and Nagaland. Public transportation is well developed in the city. Buses are the major means of public transport in Guwahati. The state-owned Assam State Urban Transport Corporation, a subsidiary of Assam State Transport Corporation (ASTC) and private operators provide the city bus services within the city. ASTC also operates the Volvo air-conditioned bus