Ayabe JCT - Miyatsu Amanohashidate IC: National Highway 478 Ayabe Miyatsu Road

Ayabe-Ankokuji IC - Ayabekita TB: Kinki Regional Development Bureau, Fukuchiyama Office of Rivers and National Highways, Ayabe National Highway Maintenance Branch Office

The Keinawa Jidoshado Expressway (KEINAWA EXPRESSWAY in English), an approximately 120-kilometer-long arterial high-standard highway (a general national highway exclusively for motor vehicles) as designated by the Ministry of Land, Infrastructure and Transportation, starts in Kyoto City, Kyoto Prefecture, runs from north to west in Nara Prefecture and leads to Wakayama City, Wakayama Prefecture.

It is built based on the bypass project for National Highway Route No. 24.

In the revised Ordinance on National General Highways dated April 1, 1993, national-highway route numbers were assigned to some arterial high-standard highways (roads exclusively for motor vehicles constructed with a design speed of 80 - 100 km/h based on national highway bypass projects) (for example General National Highway Route No. 468 to the Metropolitan Inter-City Expressway, and the general National Highway Route No. 478 to the Kyoto Jukan Jidoshado Expressway), but the Keinawa Jidoshado Express was not assigned any specified number in the 400s.

The general National Highway Route No. 24, Keinawa Jidoshado, a ring road connecting the outer lines of the Kinki Region together with the Shin Meishin Expressway, Sanyo Jidoshado Expressway, Kobe Awaji Naruto Jidoshado Expressway and Kitan Renraku Road, promotes exchange between cities and constitutes the Kansai area's large ring road, being approximately 300 km in circumference.

The Keinakita Road section connecting Kyoto City and Joyo City is now in the planning stage, because there is a plan to improve the Shin Meishin Expressway, a national expressway running east to west in Joyo City, and because the Daini-Keihan-Doro Highway (which opened in 2003) runs parallel with its western portion.

Currently, the fastest route to Kyoto City from Nara Prefecture is to take National Highway Route No. 307 from the Tanabe-nishi Interchange on the Keinawa Jidoshado Highway, continue along Osaka Prefectural Road No. 17 (Hirakata-takatsuki-sen) and get onto the Daini-Keihan-doro Bypass at the Hirakata-higashi Interchange.

It runs north to south in eastern Kansai Science City and connects with the National Highway Route No. 24 Nara Bypass at the terminus, the Kizu Interchange (in Kyoto Prefecture).

The section between Yamato-Koriyama Junction and Kashihara-Yamato Takada Junction parallels National Highway Route No. 24, the Kashihara Bypass.

This section has "No Parking, No Stopping" signs as well as a lane dedicated for motorcycle use, as found along Shin Kagetsu-kyo Bridge (Fushimi Ward, Kyoto City) of National Highway Route No. 24 and the northbound Juso Bypass of National Highway Route No. 176 (Kita and Yodogawa wards, Osaka City); moreover, the Tanabe-kita Interchange has a tollbooth for motorcycles.

In the planning stage, two plans were proposed: the first is to follow National Highway Route No. 24 throughout, and the second is to follow National Highway Route No. 24 and the Nishikujo-saho Line.

March 20, 2004: The general road (ground) section of Yamato Gose Road in Kashihara City opened between Soga-cho (National Highway Route No. 24) and Shindo-cho (National Highway Route No. 165, the Yamato Takada Bypass).

National Highway Route No. 478

Meishin Expressway, National Highway Route No. 1, National Highway Route No. 171, Keiji Bypass

National Highway Route No. 478 is a general national highway that extends from Miyazu City in Kyoto Prefecture to Kumiyama Town Kuse-gun in Kyoto Prefecture.

The road is generally constructed as the Kyoto Jukan Jidoshado Highway, although a general road is being constructed between the portion from the intersection with National Highway Route No. 171 at Oyamazaki-cho in Otokuni-gun, to the intersection with National Highway Route No. 1 at Kumiyama Town in Kuse-gun.

Origin: Miyazu City, Kyoto Prefecture (Miyazu-Amanohashidate Interchange: the terminus of the National Highway Route No. 312, Tottori Toyoka Miyazu Jidoshado Expressway

Terminus: Kumiyama Town, Kuse-gun, Kyoto Prefecture (i.e. the intersection with National Highway Route No. 1)

Ministry of Land, Infrastructure, Transport and Tourism, Kyoto National Highway Office, Kyoto Second Maintenance Branch Office (for the general road section between Oyamazaki-cho and Kumiyama Town)