Kerala has of roads, which accounts for 4.8% of India's total. This translates to about of road per thousand people, compared to an average of in the country. Roads in Kerala include of national highway; 1.6% of the nation's total, of state highway; 2.5% of the nation's total, of district roads; 4.7% of the nation's total, of urban (municipal) roads; 6.3% of the nation's total, and of rural roads; 3.8% of the nation's total. Most of Kerala's west coast is accessible through the NH 66 (previously NH 17 and 47); and the eastern side is accessible through state highways. New projects for hill and coastal highways were recently announced under KIIFB. National Highway 66, with the longest stretch of road () connects Kanyakumari to Mumbai; it enters Kerala via Talapady in Kasargod and passes through Kannur, Kozhikode, Malappuram, Guruvayur, Kochi, Alappuzha, Kollam, Thiruvananthapuram before entering Tamil Nadu. Palakkad district is generally referred to as the Gateway of Kerala, due to the presence of the Palakkad Gap in the Western Ghats, through which the northern (Malabar) and southern (Travancore) parts of Kerala are connected to the rest of India via road and rail. The state's largest checkpoint, Walayar, is on NH 544, in the border town between Kerala and Tamil Nadu, through which a large amount of public and commercial transportation reaches the northern and central districts of Kerala.