National Highway 66 (NH66), total length: 1,593 km (990 mi)
States: Maharashtra, Goa, Karnataka, Kerala, Tamil Nadu
Route：Madgaon－Panaji－Mangalore－Kasaragod－Ponnani－Ullal－Alleppey－Badagara－Cannanore－Kayankulam－Neyyattinkara－Payyannur－Taliparamba－Thiruvananthapuram－Kollam－Kozhikode－Nagercoil－Karwar－Udipi－Chiplun.
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