National Highway 40 (NH 40) (combination of previous National Highway 4 and 18) is a National Highway in India. It starts at National Highway 44 (India) junction at Kurnool and passes through Kadapa and Chittoor and terminates at Ranipet in Tamil Nadu. It is called Rayalaseema Express Highway. The highway was transformed into four lanes between Kurnool and Kadapa .
It starts at Kurnool and passes through Nandyal, Allagadda and ends at Ranipet. It runs for a distance of 392.00 km (243.58 mi) in Andhra Pradesh and 32.00 km (19.88 mi) in Tanil Nadu.