Dhaka is connected to the other parts of the country through highway and railway links. Five of the eight major national highways of Bangladesh start from the city: N1, N2, N3, N5 and N8. Dhaka is also directly connected to the two longest routes of the Asian Highway Network: AH1 and AH2, as well as to the AH41 route. Highway links to the Indian cities of Kolkata, Agartala, Guwahati and Shillong have been established by the BRTC and private bus companies which also run regular international bus services to those cities from Dhaka.