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|Maintained by East Nippon Expressway Company and Central Nippon Expressway Company|
|Length:||75.8 km (47.1 mi)|
|Existed:||1986 – present|
|Major cities:||Shiojiri, Matsumoto, Azumino|
|National highways of Japan
Expressways of Japan
The Nagano Expressway (長野自動車道 Nagano Jidōsha-dō) is a 4-laned national expressway in Nagano Prefecture, Japan. It is owned and operated by East Nippon Expressway Company and Central Nippon Expressway Company.
The expressway is officially referred to as the Chūō Expressway Nagano Route. The Chūō Expressway Nagano Route is the official designation for the Chūō Expressway between Takaido Interchange and Okaya Junction (concurrent with the Chūō Expressway Nishinomiya Route), the Nagano Expressway between Okaya Junction and Kōshoku Junction, and the Jōshin-etsu Expressway between Kōshoku Junction and Suzaka-Naganohigashi Interchange (concurrent with the Kan-Etsu Expressway Jōetsu Route).
The expressway was originally built and managed by Japan Highway Public Corporation. On October 1, 2005, the management of the route was assigned to East Nippon Expressway Company (Kōshoku Junction to Toyoshina Interchange, excluding the interchange) and Central Nippon Expressway Company (Okaya Junction to Toyoshina Interchange, including the interchange).
The route of the expressway runs through the central part of Nagano Prefecture. From the origin at a junction with the Chūō Expressway in the city of Okaya near Lake Suwa, the expressway follows a northerly course to Matsumoto, the major city in the central Nagano area. From here the expressway follows a winding northeasterly course through mountainous areas before reaching the terminus in the city of Chikuma. Beyond the terminus, the roadway continues as the Jōshin-etsu Expressway towards the city of Nagano, the prefectural capital.
- March 25, 1986 - Okaya Junction - Okaya Interchange section is opened as part of the Chūō Expressway.
- March 5, 1988 - Okaya Interchange - Matsumoto Interchange section is opened, Okaya Junction - Okaya Interchange section is incorporated as part of the Nagano Expressway.
- August 3, 1988 - Matsumoto Interchange - Toyoshina Interchange section is opened.
- March 25, 1993 - Toyoshina Interchange - Kōshoku Junction section is opened, connects with Jōshin-etsu Expressway.
- October 1, 2006 - Obasute Smart Interchange is opened at Obasute Service Area.
List of interchanges and features
- IC - interchange, SIC - smart interchange, JCT - junction, SA - service area, PA - parking area, BS - bus stop, CB - snow chains, TN - tunnel, BR - bridge
|Bus Stop||Notes||Speed Limit||Location
(all in Nagano)
|(21)||Okaya JCT||Chūō Expressway||0.0||75.8||70 km/h||Okaya|
|BR||Okaya Overpass||↓||↑||Length - 1,488m|
Okaya (Imai) BS
|National Route 20||3.7||72.1||○|
|2||Shiojiri IC||National Route 20 (Shiojiri Bypass)||10.9||64.9|
|3||Shiojiri-kita IC||Pref. Route 27 (Matsumoto Airport Shiojiri-kita Inter Route)||17.6||58.2|
|<3-1>||Matsumoto JCT||Chūbu-Jūkan Expressway||↓||↑||Planned|
|4||Matsumoto IC||National Route 158||25.8||50.0||○|
|SA||Azusagawa SA||29.1||(46.7)||Kōshoku-bound only|
|BR||Azusagawa Bridge||↓||↑||Length - 390m|
|SA||Azusagawa SA||(29.9)||45.9||Okaya-bound only|
|5||Toyoshina IC||Pref. Route 57 (Toyoshina Inter Horigane Route)
Pref. Route 310 (Hakuyachō Tazawa Teishajō Route)
|BR||Saigawa Bridge||↓||↑||Length - 650m|
|BS||Shiga BS||40.5||35.3||○||Emergency vehicle entrance/exit planned||Matsumoto|
|BS||Honjō BS||47.3||28.5||○||Emergency vehicle entrance/exit|
|6||Omi IC||National Route 403||56.3||19.5||○|
|63.6||12.2||○||SIC: Okaya-bound entrance, Kōshoku-bound exit only
|BR||Chikumagawa Bridge||↓||↑||Length - 530m||Nagano|
|7||Kōshoku IC||National Route 18||74.9||0.9||○|
|(12)||Kōshoku JCT||Jōshin-etsu Expressway||75.8||0.0|
|Through to Jōshin-etsu Expressway|
There is one snow chain changing area between Obasute Service Area and Kōshoku Interchange.
- "Expressway Opening Dates" (in Japanese). Retrieved 2008-04-16.
- Ministry of Land, Infrastructure and Transport, Kanto Regional Development Bureau. "Road Timetable" (in Japanese). Retrieved 2008-04-16.
- Ministry of Land; Infrastructure and Transport. "High Standard Trunk Road Map" (pdf) (in Japanese). Retrieved 2008-04-13.
- Mizutani, Fumitoshi; Uranishi, Shuji (2006). Privatization of the Japan Highway Public Corporation: Policy Assessment (pdf). 46th Congress for the European Regional Science Association. Volos, Greece. Retrieved 2008-04-11.
- "NEXCO-Central Business Outline" (pdf). Retrieved 2008-04-13.