National Highway 66, commonly referred to as NH 66, is a mostly 4 lane 1640 km 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 to Cape Comorin (Kanyakumari), passing through the states of Maharashtra, Goa, Karnataka, Kerala and Tamil Nadu.

Panvel is a city and taluka in Raigad district of Maharashtra, India. It is highly populated due to its closeness to Mumbai. Panvel is also governed for development purpose by the body of Mumbai Metropolitan Region. Panvel Municipal Corporation is the first Municipal Corporation in Raigad and the 27th Municipal corporation of Maharashtra State.