Five National Highways pass through Mangalore.[219] NH-66 (previously known as NH-17[220]), which runs from Panvel, Maharashtra, to Kanyakumari, Tamil Nadu, passes through Mangalore in a north–south direction.[221] NH-75 (previously known as NH-48) runs eastward to Bangalore and Vellore.[222] NH-169 (previously known as NH-13) runs north-east from Mangalore to Shimoga.[223] NH-73, a 315 km (196 mi)-long National Highway connects Mangalore to Tumkur.[224] NH-275 also connects Mangalore with Bangalore via Mysore.[225] National Highways Authority of India (NHAI) is upgrading the national highways connecting New Mangalore Port to Surathkal on NH-66 and BC Road junction on NH-75.[226] Under the port connectivity programme of the National Highways Development Project (NHDP), a 37.5 km (23 mi) stretch of these highways will be widened from two lanes to four.[227]