Okayama Expressway

{{Short description|Expressway in Okayama prefecture, Japan}}

{{Infobox road

|country=JPN

|type=Expressway

|route=Okayama

|alternate_name=File:JP Expressway E73.svg 岡山自動車道

|map=

|length_km= 43.9

|length_ref=

|established= 1991

|terminus_a=Okayama Junction in Kita-ku, Okayama
File:JP Expressway E2.svg Sanyō Expressway

|cities= Takahashi

|terminus_b= Hokubō Junction in Maniwa, Okayama
File:JP Expressway E2A.svg Chūgoku Expressway

}}

The {{nihongo|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

File:Okayama Expressway, Kibichūō Town, Kita1.JPG

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

table class="wikitable"
style="border-bottom:3px solid green;"|No.

!style="border-bottom:3px solid green;"|Name

!style="border-bottom:3px solid green;"|Connections

!style="border-bottom:3px solid green;"|Dist. from
Origin

!style="border-bottom:3px solid green;"|Bus Stop

!style="border-bottom:3px solid green;"|Notes

!colspan="2" style="border-bottom:3px solid green;"|Location
(all in Okayama)

style="background:#bfb;"|(15)

|Okayama JCT

|File:JP Expressway E2.svg Sanyō Expressway

|style="text-align:right;"|0.0

|style="text-align:center;"|

|

|rowspan="2"|Kita-ku, Okayama

style="background-color:#BFB;"|1

|Okayama-Sōja IC

|20px National Route 180
20px National Route 429

|style="text-align:right;"|2.7

|style="text-align:center;"|

|

style="background-color:#BFB;"|PA

|Sōja PA

|

|style="text-align:right;"|7.0

|style="text-align:center;"|

|

|rowspan="4"|Sōja

style="background-color:#BFB;"|TN

|Tōzaka Tunnel

|

|style="text-align:right;"|

|style="text-align:center;"|

|northbound: {{convert|1,450|m|ft|abbr=on}}
southbound: {{convert|1,460|m|ft|abbr=on}}

style="background-color:#BFB;"|BR

|Minobe Bridge

|

|style="text-align:right;"|

|style="text-align:center;"|

|Length - 703 m

style="background-color:#BFB;"|TN

|Makidani Tunnel

|

|style="text-align:right;"|

|style="text-align:center;"|

|northbound: {{convert|1,170|m|ft|abbr=on}}
southbound: {{convert|1,070|m|ft|abbr=on}}

style="background-color:#BFB;"|2

|Kayō IC

|20px National Route 484

|style="text-align:right;"|22.6

|style="text-align:center;"|○

|

|Kibichūō

style="background-color:#bfb;"|SA

|Takahashi SA

|

|style="text-align:right;"|30.9
31.4

|style="text-align:center;"|

|For Hokubō
for Okayama

|rowspan="3"|Takahashi

style="background:#bfb;"|3

|Ukan IC

|Okayama Prefectural Road 49

|style="text-align:right;"|35.5

|style="text-align:center;"|○

|

rowspan="2" style="background-color:#BFB;"|TN

|rowspan="2"|Ukan Tunnel

|rowspan="2" style="text-align:center;"|

|rowspan="2"|

|rowspan="2"|

|rowspan="2"|Length - {{convert|1,529|m|ft|abbr=on}}

rowspan="3"|Maniwa
style="background-color:#bfb;"|BS

|Hokubō Mizuta BS

|

|style="text-align:right;"|43.1

|style="text-align:center;"|○

|

style="background:#bfb;"|(17)

|Hokubō JCT

|File:JP Expressway E2A.svg Chūgoku Expressway

|style="text-align:right;"|43.9

|style="text-align:center;"|

|