A map of Network of National Highways in India, including NHDP projects up to phase IIIB, which is due to be completed by December 2012. The National Highways are the main long-distance roadways and constitute a total of about 58,000 km (36,250 mi), of which 4,885 km (3,053 mi) are central-separated expressways. Highways in India are around 2% of the total road network in India, but carry nearly 40% of the total road traffic.