The route is signed E97 under Ministry of Land, Infrastructure, Transport and Tourism's "2016 Proposal for Realization of Expressway Numbering.

"[1] The Ōita Airport Road begins at a signaled intersection with Japan National Route 213 just to the east of central Hiji.

When the routes merge, they turn to the northeast, traveling out of Hiji and in to Kitsuki.

The road curves more to the east in Kitsuki and then enters the southern part of Kunisaki.

A spur route of the toll road, connecting it to the Hiji Bypass, was opened on 30 March 2002.