The new NH-566 (ex NH-17B) is a four-lane highway connecting Mormugao Port to NH-66 at Verna via Dabolim Airport, primarily built to ease pressure on the NH-366 for traffic to Dabolim Airport and Vasco da Gama. NH-768 (ex NH-4A) links Panaji and Ponda to Belgaum and NH-4. Goa has a total of 224 km (139 mi) of national highways, 232 km (144 mi) of state highway and 815 kilometres (506 miles) of district highway.