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Nagano Expressway

Nagano Expressway sign
Nagano Expressway
長野自動車道
Map
Route information
Maintained by East Nippon Expressway Company and Central Nippon Expressway Company
Length75.8 km[2] (47.1 mi)
Existed1986[1]–present
Major junctions
FromOkaya Junction in Okaya, Nagano
Chūō Expressway
ToKōshoku Junction in Chikuma, Nagano
Jōshin-etsu Expressway
Location
CountryJapan
Major citiesShiojiri, Matsumoto, Azumino
Highway system

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.

Naming

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).[3]

Overview

Nagano Expressway

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 Azumino Interchange, excluding the interchange) and Central Nippon Expressway Company (Okaya Junction to Azumino Interchange, including the interchange).[4][5]

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.

History

  • 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

No. Name Connections Dist. from
Origin 		Dist. from
Terminus 		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
TN Okaya Tunnel ↓ ↑ North-bound 1,450 m
South-bound 1,386 m
1 Okaya IC/
Okaya (Imai) BS 		National Route 20 (Shimosuwa Okaya Bypass) 3.7 72.1 ○
TN Enrei Tunnel ↓ ↑ North-bound 1,800 m
South-bound 1,707 m
Shiojiri
PA Midoriko PA 8.4 67.4 ○
2 Shiojiri IC National Route 20 (Shiojiri Bypass) 10.9 64.9
100 km/h
BS Hirooka-Nomura BS 14.1 61.7 ○
3 Shiojiri-kita IC Pref. Route 27 (Matsumoto Airport Shiojiri-kita Inter Route) 17.6 58.2
BR Naraigawa Bridge ↓ ↑ Matsumoto
BS Kanbayashi BS 21.0 54.8 ○
<3-1> Matsumoto JCT Chūbu-Jūkan Expressway ↓ ↑ Planned
4 Matsumoto IC National Route 158 25.8 50.0 ○
SA Azusagawa SA/SIC Pref. Route 48 (Matsumoto Kanjō Takaya Route) 29.1 (46.7) Kōshoku-bound only
BR Azusagawa Bridge ↓ ↑ Length - 390m
Azumino
SA Azusagawa SA/SIC (29.9) 45.9 Okaya-bound only
5 Azumino IC Pref. Route 57 (Azumino Inter Horigane Route)
Pref. Route 310 (Hakuyachō Tazawa Teishajō Route) 		33.1 42.7 ○
80 km/h
BR Saigawa Bridge ↓ ↑ Length - 650m
BS Akashina BS 36.5 39.3 ○
TN Akashina Tunnel ↓ ↑ North-bound 2,512 m
South-bound 2,536 m
BS Shiga BS 40.5 35.3 ○ Emergency vehicle entrance/exit Matsumoto
TN Tachitoge Tunnel ↓ ↑ North-bound 3,629 m
South-bound 3,598 m
Chikuhoku
BS Honjō BS 47.3 28.5 ○ Emergency vehicle entrance/exit
BS Sakakita BS 51.5 24.3 ○
PA Chikuhoku PA/SIC 52.8 23.0 SIC planned
Omi
6 Omi IC National Route 403 56.3 19.5 ○
TN Ipponmatsu Tunnel ↓ ↑ North-bound 3,191 m
South-bound 3,203 m
Chikuma
SA Obasute SA/
SIC 		63.6 12.2 ○
BR Chikumagawa Bridge ↓ ↑ Length - 530m Nagano
Chikuma
7 Kōshoku IC National Route 18 (Ueda Shinonoi Bypass) 74.9 0.9 ○
(12) Kōshoku JCT Jōshin-etsu Expressway (To Fujioka and Tōkyō) 75.8 0.0
Through to Jōshin-etsu Expressway (To Nagano and Jōetsu)

There is one snow chain changing area between Obasute Service Area and Kōshoku Interchange.

References

  1. ^ "Expressway Opening Dates" (in Japanese). Retrieved 2008-04-16.
  2. ^ Ministry of Land, Infrastructure and Transport, Kanto Regional Development Bureau. "Road Timetable" (in Japanese). Archived from the original on 2004-06-04. Retrieved 2008-04-16.{{cite web}}: CS1 maint: multiple names: authors list (link)
  3. ^ Ministry of Land; Infrastructure and Transport. "High Standard Trunk Road Map" (PDF) (in Japanese). Archived from the original (PDF) on 2011-09-20. Retrieved 2008-04-13.
  4. ^ 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.
  5. ^ "NEXCO-Central Business Outline" (PDF). Retrieved 2008-04-13.[permanent dead link‍]

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