In addition to the three numbered routes, there are unnumbered highways on the islands of Ofu, Olosega, Tau, and Tutuila.

All are maintained by the American Samoa Department of Public Works.

It provides access from Aua, east of Pago Pago, to Vatia.The Ofu-Olosega Highway is a highway linking the islands of Ofu and Olosega.

[1] The highway travels from the village of Ofu, along the coast of the islands of Ofu and Olosega to the village of Olosega.

The highway passes the Ofu Airport, makes up most of the northern border of the Ofu portion of American Samoa National Park, and passes as a one-lane bridge over the Agasa Strait.