Common
National Highway 66 (India)
North–south high-capacity road
National Highway 66 (India)
National Highway 66, commonly referred to as NH 66 (erstwhile NH-17 and a part of NH-47), is a 1640 km (1020 miles) long, mostly 4-lane National Highway that runs roughly north–south along the western coast of India, parallel to the Western Ghats. It connects Panvel, a city east of Mumbai to Kanyakumari via Mangaluru, passing through the states of Maharashtra, Goa, Karnataka, Kerala and Tamil Nadu. Also the road passes through Mahe district, the third district of Puducherry (union territory). The highway is undergoing a major overhaul in Kerala, where the National Highways Authority of India (NHAI) is developing a six-lane national highway of international standard with a width of 45 metres. The complete 645-km stretch from Thalappady at the Karnataka border to Karode at the Tamil Nadu border is being widened to six lanes as part of the Bharatmala Pariyojana. In March 2026, major sections including the Thalappady–Chengala stretch and the Kozhikode Bypass were inaugurated, significantly...
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