| Country | JPN |
|---|---|
| Route | Okayama |
| Alternate name | 岡山自動車道 |
| Length | 43.9 km |
| Established | 1991 |
| Terminus a | Okayama Junction in Kita-ku, Okayama Sanyō Expressway |
| Cities | Takahashi |
| Terminus b | Hokubō Junction in Maniwa, Okayama Chūgoku Expressway |
The Okayama Expressway (岡山自動車道, Okayama Jidōsha-dō) is a national expressway in Okayama Prefecture, Japan. It is owned and operated by West Nippon Expressway Company.
Naming
The expressway is officially referred to as the Chūgoku-Ōdan Expressway Okayama Yonago Route. The Chūgoku-Ōdan Expressway Okayama Yonago Route is the official designation for the Sanyō Expressway between Okayama Interchange and Okayama Junction, the Okayama Expressway between Okayama Junction and Hokubō Junction, the Chūgoku Expressway between Hokubō Junction and Ochiai Junction, and the Yonago Expressway between Ochiai Junction and Yonago Interchange (concurrent with the Chūgoku-Ōdan Expressway Okayama Yonago Route).
Overview
The first section of the expressway was opened in 1991. The final section of the expressway (41.2 km between Okayama-Sōja Interchange and Hokubō Junction) was opened on March 15, 1997. The route originates from its junction with the Sanyō Expressway and extends northward. At its northern terminus it connects to the Chūgoku Expressway.
The expressway is 4 lanes from Okayama Junction to Kayō Interchange and the remainder is 2 lanes. The speed limit is 80 km/h on 4-laned sections and 70 km/h on 2-laned sections.
List of interchanges and features
- IC - interchange, SIC - smart interchange, JCT - junction, SA - service area, PA - parking area, BS - bus stop, TN - tunnel, BR - bridge
| No. | Name | Connections | Dist. from Origin | Bus Stop | Notes | Location (all in Okayama) | |
|---|---|---|---|---|---|---|---|
| (15) | Okayama JCT | Sanyō Expressway | 0.0 | Kita-ku, Okayama | |||
| 1 | Okayama-Sōja IC | National Route 180 National Route 429 | 2.7 | ||||
| PA | Sōja PA | 7.0 | Sōja | ||||
| TN | Tōzaka Tunnel | northbound: 1,450 m (4,760 ft) southbound: 1,460 m (4,790 ft) | |||||
| BR | Minobe Bridge | Length - 703 m | |||||
| TN | Makidani Tunnel | northbound: 1,170 m (3,840 ft) southbound: 1,070 m (3,510 ft) | |||||
| 2 | Kayō IC | National Route 484 | 22.6 | ○ | Kibichūō | ||
| SA | Takahashi SA | 30.9 31.4 | For Hokubō for Okayama | Takahashi | |||
| 3 | Ukan IC | Okayama Prefectural Road 49 | 35.5 | ○ | |||
| TN | Ukan Tunnel | Length - 1,529 m (5,016 ft) | |||||
| Maniwa | |||||||
| BS | Hokubō Mizuta BS | 43.1 | ○ | ||||
| (17) | Hokubō JCT | Chūgoku Expressway | 43.9 | ||||
External links
- (in Japanese) West Nippon Expressway Company