N670 highway

National Highway 670 is a national highway in the Philippine highway network. This highway traverses the island of Samar, including the provinces of Northern Samar, Eastern Samar, and Samar. It starts in Allen, Northern Samar, from the Pan-Philippine Highway and travels east to Northern Samar. It then turns south to Eastern Samar, and west for the province of Samar.

The first portion of the highway was created in 1983 with the construction of the Catarman-Laoang Road. Since then, multiple portions of the highway have been built, with most of them being created from the 1980s to the 2000s. The last portion of the highway to be built was the San Policarpo-Arteche-Lapinig Road, created in 2009. Since the full completion of the highway, numerous typhoons have closed portions of the highway.