Goods are transported to and from India via Birgunj dry port, which is the key terminal of surface cargo delivery to Nepal. This cargo point on the south connects the heart of the country, Kathmandu, via another key industrial city, Hetauda. It is also served by Tribhuvan Highway, extending from the Indian border at Raxaul through Birgunj and Hetauda to Kathmandu with frequent bus service. Simara Airport — north near the highway in Pipara Simara, Bara district — offers scheduled flights to Kathmandu.