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Kan-etsu Expressway

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The Kan-Etsu Expressway (関越自動車道, Kan'etsu Jidōsha-dō) is a national expressway in Japan. It is owned and managed by East Nippon Expressway Company.

Kan-Etsu Expressway sign

Kan-Etsu Expressway
E17 関越自動車道
Route information
Length245.8 km[2] (152.7 mi)
Existed1971[1]–present
Major junctions
FromNerima Interchange in Nerima, Tokyo
Tokyo Metropolitan Route 24
ToNagaoka Junction in Nagaoka, Niigata
Hokuriku Expressway
Location
Major citiesKawagoe, Fujioka, Takasaki, Maebashi, Ojiya
Highway system
National highways of Japan
Expressways of Japan

NamingEdit

Kan-Etsu (関越) is the kanji acronym of Kantō () and the old Echigo Province (後国) comprising modern-day Niigata Prefecture.

Officially, the Kan-Etsu consists of two routes. Both begin in Tokyo and end in Niigata Prefecture. The Kan-Etsu Expressway Niigata Route consists of the entire Kan-Etsu Expressway from Nerima to Nagaoka, as well as the Hokuriku Expressway beyond Nagaoka to its terminus in the city of Niigata. The Kan-Etsu Expressway Jōetsu Route is concurrent with the Niigata Route until Fujioka Junction, where it branches off as the Jōshin-etsu Expressway and traverses Nagano Prefecture to its terminus in Jōetsu, Niigata.[3] The remainder of this article will focus on the Niigata Route section between Nerima and Nagaoka.

OverviewEdit

 
Kan-Etsu Expressway in Minamiuonuma

The expressway begins in Nerima Ward in the north of Tokyo; the Kan-etsu is the only national expressway linking Tokyo that does not have a direct connection with the urban Shuto Expressway network. A junction with the Tokyo Gaikan Expressway near the origin links the Kan-etsu with other expressways serving northern parts of the Tokyo urban area. From here the expressway follows a roughly northwesterly course to its terminus in Niigata Prefecture, passing through central areas of Saitama Prefecture and Gunma Prefecture. In Gunma the Kan-etsu provides access to Nagano Prefecture by way of the Jōshin-etsu Expressway at Fujioka Junction, and completion of the Kita-Kantō Expressway in 2011[4] will facilitate access to Tochigi Prefecture and Ibaraki Prefecture. The mountainous area separating Gunma and Niigata Prefectures is traversed by the Kan-Etsu Tunnel, the second longest road tunnel in Japan.[5] The expressway then passes through southern Niigata Prefecture before terminating at a junction with the Hokuriku Expressway in Nagaoka.

The expressway parallels National Route 17 and the Jōetsu Shinkansen of East Japan Railway Company for most of its length.

The first section opened in 1971 and the entire route was opened to traffic in 1985.[6] The route is six lanes from Ōizumi Junction to Shibukawa-Ikaho Interchange, and all other sections are four lanes.

List of interchanges and featuresEdit

  • IC - interchange, SIC - smart interchange, JCT - junction, SA - service area, PA - parking area, TB - toll gate, BS - bus stop, CB - snow chains, TN - tunnel, BR - bridge
No. Name Connections Dist. from
origin
Dist. from
terminus
Bus stop Notes Speed limit Location
1 Nerima IC Met. Route 24 (Nerima Tokorozawa Route / Mejiro Dōri) 0.0 246.2 80 km/h Nerima Tokyo
2 Ōizumi JCT   Tokyo Gaikan Expressway 0.8 245.0 IC entrance: Nagaoka-bound only
Ōizumi IC Met. Route 24 (Nerima Tokorozawa Route / Mejiro Dōri)
TB Niiza Toll Gate Niiza Saitama
100 km/h
3 Tokorozawa IC   National Route 463 (Urawa Tokorozawa Bypass) 9.4 237.6 Tokorozawa
PA Miyoshi PA/
SIC
13.9 233.1 Miyoshi
4 Kawagoe IC   National Route 16 21.2 225.9 Kawagoe
BS Kawagoe-
Matoba BS
4-1 Tsurugashima JCT    Ken-Ō Expressway 27.8 219.3 Tsurugashima
5 Tsurugashima IC   National Route 407 29.6 217.5
5-1 Sakado-Nishi SIC Pref. Route 39 (Kawagoe Sakado Moroyama Route) 32.5 214.6 Sakado
SA Takasaka SA 34.7 212.4 Higashi-
matsuyama
6 Higashi-
matsuyama IC
  National Route 254
Pref. Route 47 (Fukaya Higashimatsuyama Route)
39.4 207.7
6-1 Ranzan-Ogawa IC Pref. Route 11 (Kumagaya Ogawa Chichibu Route) 47.4 199.7 Ranzan
PA Ranzan PA 50.1 197.0
7 Hanazono IC   National Route 140 56.1 191.0 Fukaya
7-1
PA
Yorii PA 63.4 183.7 SIC: Nagaoka-bound only Fukaya/
Yorii
8 Honjō-Kodama IC   National Route 462 69.6 177.5 Honjō
8-1
SA
Kamisato SA/
SIC
75.5 170.6 Kamisato
9 Fujioka JCT   Jōshin-etsu Expressway 78.6 167.5 Fujioka Gunma
9-1 Takasaki-Tamamura SIC   National Route 354 (Takasaki-Tamamura Bypass) 82.7 163.4 Takasaki
9-2 Takasaki JCT   Kita-Kantō Expressway 84.6 161.5
10 Takasaki IC Pref. Route 27 (Takasaki Komagata Route) 87.0 159.1
11 Maebashi IC   National Route 17 92.1 154.0 Takasaki/
Maebashi
11-1
PA
Komayose PA/
SIC
98.5 147.6 Yoshioka
12 Shibukawa-Ikaho IC   National Route 17 (Shibukawa Bypass) 103.4 142.7 Shibukawa
80 km/h
BR No.1 Tonegawa Bridge Length: 784 m
CB Miharada CB Nerima-bound only
12-1/
PA
Akagi IC/PA Pref. Route 70 (Ōmama Kamishiroi Route) 111.2 134.9
SA Akagi-kōgen SA 118.5 127.6 Shōwa
12-2 Showa IC Pref. Route 65 (Shōwa Inter Route) 120.6 125.5
13 Numata IC   National Route 120 125.8 120.3 Numata
CB Numata CB Nagaoka-bound only
14 Tsukiyono IC   National Route 17 131.1 115.0 Minakami
PA Shimomoku PA 135.5 110.6
BR Ōmine Bridge Length: 784 m
15 Minakami IC   National Route 291 141.0 105.1
PA Tanigawadake PA 146.0 100.1
TN Kan-Etsu Tunnel Nerima-bound 11,055 m
Nagaoka-bound 10,926 m
70 km/h
Yuzawa Niigata
PA Tsuchitaru PA 157.5 88.6 80 km/h
16 Yuzawa IC   National Route 17 167.0 79.1
TN Ishiuchi Tunnel Nerima-bound 1,590 m
Nagaoka-bound 1,500 m
Minami-
uonuma
SA Shiozawa-
Ishiuchi SA
(173.5) 72.3 Nerima-bound only
16-1/
SA
Shiozawa-
Ishiuchi IC/SA
Pref. Route 28 (Shiozawa Yamato Route) 175.5 70.6 SA: Nagaoka-bound only
BR Nakanojima Bridge Length: 460 m
17 Muikamachi IC   National Route 253 186.9 59.2
BR Hakkai Bridge Length: 610 m
17-1/
PA
Yamato PA/
SIC
198.3 47.8
18 Koide IC   National Route 291 204.4 41.7 Uonuma
18-1/
PA
Horinouchi IC/PA Pref. Route 84 (Horinouchi Inter Route) 212.1 34.0
BR Kawaguchi Bridge Nagaoka
19/SA Echigo-Kawaguchi IC/SA Pref. Route 83 (Kawaguchi Shiodono Route) 220.9 25.2
TN Yamamotosan Tunnel Ojiya
20 Ojiya IC   National Route 291 228.8 17.3
100 km/h
PA Yamaya PA 230.9 15.2
BS Katakai BS 235.0 11.1
BS Koshiji BS 238.5 7.6 Nagaoka
20-1 Nagaokaminami-
Koshiji SIC
Pref. Route 23 (Kashiwazaki Takahama Horinouchi Route)
21 Nagaoka IC   National Route 8
Pref. Route 86 (Nagaoka Inter Route)
244.5 1.6
80 km/h
(37) Nagaoka JCT   Hokuriku Expressway 246.1 0.0
Through to   Hokuriku Expressway

ReferencesEdit

  1. ^ "Expressway Opening Dates". Retrieved 2008-04-16.
  2. ^ Ministry of Land, Infrastructure and Transport, Kanto Regional Development Bureau. "Road Timetable". Archived from the original on 2008-04-26. Retrieved 2008-04-16.CS1 maint: multiple names: authors list (link)
  3. ^ Ministry of Land, Infrastructure and Transport. "High Standard Trunk Road Map" (PDF). Archived from the original (pdf) on 2011-09-20. Retrieved 2008-04-13.
  4. ^ "E-NEXCO Opening Schedule". Retrieved 2008-04-15.
  5. ^ Nagasaki University Geo-Environment Laboratory. "Kanetsu Tunnel". Archived from the original on 2008-04-08. Retrieved 2008-04-16.
  6. ^ Japan Civil Engineering Contractors Association. "Construction History of Japan, 1985". Archived from the original on 2008-04-29. Retrieved 2008-04-16.

External linksEdit