"[2][3] The southern terminus of the Shimokita Expressway is at a signaled intersection with National Route 4 in Tōhoku.

From Noheji heading north through the Shimokita Peninsula, the expressway parallels the mainline of National Route 279.

The expressway's importance in the village is critical due to the presence of multiple nuclear facilities.

It crosses into the town of Yokohama where it meets its temporary northern terminus at the main line of National Route 279.

[7] On 11 January 2019, the governor of Aomori Prefecture, Shingo Mimura requested the Liberal Democratic Party's help in providing funding for the section between Noheji and Shichinohe.