National Highway 66, commonly referred to as NH 66 (erstwhile NH-17 and a part of NH-47), is a mostly 4 lane 1640 km (1020 miles) long busy 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 (Bombay) to Cape Comorin (Kanyakumari) via Mangaluru, passing through the states of Maharashtra, Goa, Karnataka, Kerala and Tamil Nadu.
The highway is undergoing a major overhaul in Karnataka, where the state government has accepted the NHAI's request of international standard, 60-metre-wide national highway with grade separators. The complete stretch from the Goa border (near Karawara) to the Kerala border (near Talapady) is being widened to four lanes, with space to accommodate future expansion to six lanes. There were protests from the people, who will lose lands, for a narrower stretch. But the Karnataka government has not heeded to the protests.
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