Seohaean Expressway

The Seohaean Expressway (Korean: 서해안 고속도로; Seohaean Gosok Doro), meaning "West Coast Expressway", is a freeway in South Korea, connecting Mokpo to Gunsan, Dangjin, and Seoul.

Expressway No.15 shield}}
Expressway No.15
Seohaean Expressway
서해안고속도로
Route information
Length346.1 km (215.1 mi)
Existed1994–present
Major junctions
South endMokpo, Jeonnam Province (Mokpo IC)
National Route 1
Major intersections Namhae Expressway
Muan-Gwangju Expressway
Gochang-Damyang Expressway
Seocheon-Gongju Expressway
Dangjin-Yeongdeok Expressway
Pyeongtaek-Siheung Expressway
Pyeongtaek-Jecheon Expressway
Yeongdong Expressway
Seoul Ring Expressway
Second Gyeongin Expressway
North endGeumcheon, Seoul (Geumcheon IC)
Seobu Urban Expressway
Location
CountrySouth Korea
Major citiesGimje, Gunsan, Boryeong, Seosan, Dangjin, Pyeongtaek, Hwaseong, Ansan, Anyang
Highway system
Seohaean Expressway
Hangul
Hanja
Revised RomanizationSeohaean Gosok Doro
McCune–ReischauerSŏhaean Kosok Toro
Haengdamdo Service Area

It is numbered 15. The entire length from Seoul to Mokpo is 345 km and the posted speed limit is 110 km/h, enforced primarily by speed cameras. It is connected of Seohae Grand Bridge in Pyeongtaek to Dangjin.

The branch expressways of the Seohaean Expressway are Seocheon–Gongju Expressway and Pyeongtaek–Siheung Expressway.

Typical facilities of this expressway is Seohae Bridge(Korean: 서해대교; Seohae Daegyo) which the total length of 7.3 km linking the Pyeongtaek(Gyeonggi Province) and Dangjin(Chungnam Province). The bridge is the third long bridge in the Republic of Korea.

The highway is a major highway linking the Seohaean Region(서해안권) for the first north–south axis (남북 제1축), the road through the South Jeolla Province, North Jeolla Province, South Chungcheong Province, Gyeonggi Province.

History

  • December 1991 – Construction begin
  • May 1993 – Construction begin of Seohae Grand Bridge
  • 6 July 1994 – Seoul–Ansan segment opened to traffic.
  • 17 December 1996 – Ansan–Pyeongtaek segment opened to traffic.
  • 25 August 1998 – Mokpo–Muan segment opened to traffic.
  • 30 October 1998 – Gunsan–Seocheon segment opened to traffic.
  • 10 November 2000 – Seohae Grand Bridge segment opened to traffic. and Pyeongtaek–Dangjin segment opened to traffic.
  • 27 September 2001 – Dangjin–Seocheon segment opened to traffic.
  • 21 December 2001 – The last segment, Gunsan–Muan segment opened to traffic.
  • 30 July 2010 – Work begins to widen to 8 lanes in Ansan–Iljik Junction.
  • 23 November 2011 – Jungnim Junction opened to traffic.
  • October 2014 – Seohae Bridge – W. Pyeongtaek Junction Section (10.3 km) road expansion started construction.
  • November 2014 – The 10-lane expansion of the Ansan JCT – Jonam JCT (2.9 km) section was completed.
  • June 2015 – The 10-lane expansion of the Jonam JCT – Mokgam IC (3.2 km) section was completed.
  • 23 December 2015 – The 10-lane expansion of the Mokgam IC – Iljik JCT (3.8 km) section was completed.
  • 3 July 2016 – Soha Junction opened to traffic.

Compositions

Lanes

  • Mokpo IC – Dangjin JC, Iljik JC-West Seoul End: 4
  • Dangjin JC – Bibong IC, Maesong IC-Ansan JC, Jonam JC–Mokgam IC: 6
  • Mokgam IC – Iljik JC, Bibong IC – Maesong IC, West Seoul TG-Jonam JC: 8
  • Ansan-Iljik, Yangjae-Giheung, unjung Bridge and Seoul Ring Road (Rigid Pavement) 130 km JC –  : 10

Length

346.1 km (215.1 mi)

Speed limits

  • Jungnim JC – Maesong IC : 110 km/h
  • Maesong IC – Seoul(Geumcheon) : 100 km/h
  • Mokpo – Jungnim JC : 90 km/h

List of facilities

  • IC: Interchange, JC: Junction, SA: Service area, TG:Tollgate
No.NameKorean nameHanja nameConnectionsDistanceNotesLocation
Connected directly with National Route 1, National Route 2(Goha-daero)(고하대로)
Mokpo목포 시점木浦 始點National Route 1
National Route 2
Mokpo Bridge
Aphae Bridge
0.0MokpoJeonnam
1 Mokpo IC목포나들목木浦나들목National Route 1
(Yeongsan-ro)
0.260.26
Jungnim JC죽림분기점竹林分岐點 Namhae Expressway
(Mokpo–Gwangyang)
National Route 2
Jeonnam Provincial Office
Mokpo Airport
3.904.16Muan
2 Illo IC일로나들목一老나들목Local Route 8152.106.26
TG Mokpo TG목포요금소木浦料金所Main Tollgate
3 Muan IC무안나들목務安나들목National Route 117.2823.54
4 Hampyeong JC함평분기점咸平分岐點 Muan-Gwangju Expressway
Muan International Airport
2.4626.00Hampyeong
SA Hampyeong
-cheonji SA
함평천지휴게소咸平天地休憩所Mokpo-bound only
5 Hampyeong IC함평나들목咸平나들목 National Route 237.8133.81
SA Hampyeong
-cheonji SA
함평천지휴게소咸平天地休憩所Seoul-bound only
6 Yeonggwang IC영광나들목靈光나들목 National Route 2324.3358.14Yeonggwang
7 Gochang JC고창분기점高敞分岐點 Gochang-Damyang Expressway16.0674.20GochangJeonbuk
8 Gochang IC고창나들목高敞나들목Local Route 152.7476.94
SA Gochang Goindol SA고창고인돌휴게소高敞고인돌休憩所
9 Seonunsan IC선운산나들목禪雲山나들목 National Route 22
Seonunsa
7.9184.85
10 Julpo IC줄포나들목茁浦나들목Local Route 7109.8794.72Buan
11 Buan IC부안나들목扶安나들목 National Route 3016.18110.90
12 W Gimje IC서김제나들목西金堤나들목 National Route 29
Saemangeum-Jeonju Expressway
(December 2021)
Saemangeum
13.93124.83Gimje
13 E Gunsan IC동군산나들목東群山나들목 National Route 21
National Route 26
National Route 29
12.55137.38Gunsan
SA Gunsan SA군산휴게소群山休憩所Mokpo-bound only
14 Gunsan IC군산나들목群山나들목 National Route 218.40145.78
SA Gunsan SA군산휴게소群山休憩所Seoul-bound only
15 E Seocheon JC동서천분기점東舒川分岐點 Seocheon-Gongju Expressway6.23152.01SeocheonChungnam
16 Seocheon IC서천나들목舒川나들목 National Route 48.98160.99
SA Seocheon SA서천휴게소舒川休憩所
17 Chunjangdae IC춘장대나들목春長臺나들목 National Route 2111.91172.90
18 Muchangpo IC무창포나들목武昌浦나들목Local Route 6068.71181.61Boryeong
19 Daecheon IC대천나들목大川나들목 National Route 36
Daecheon Beach
11.99193.60
SA Daecheon SA대천휴게소大川休憩所
20 Gwangcheon IC광천나들목廣川나들목Local Route 9619.72213.32Hongseong
SA Hongseong SA홍성휴게소洪城休憩所
21 Hongseong IC홍성나들목洪城나들목 National Route 2910.80224.12
22 Haemi IC해미나들목海美나들목 National Route 45
Haemieupseong
13.68237.80Seosan
SA Seosan SA서산휴게소西山休憩所
23 Seosan IC서산나들목西山나들목 National Route 3210.78248.52
24 Dangjin JC당진분기점唐津分岐點 Dangjin-Yeongdeok Expressway6.56255.08Dangjin
25 Dangjin IC당진나들목唐津나들목 National Route 349.39264.47
26 Songak IC송악나들목松岳나들목 National Route 38
Dangjin Steelworks
8.07272.54
SA Haengdam Island SA
(Ocean Park Resort)
행담도휴게소行淡島休憩所In the Seohae Grand Bridge
BR Seohae Bridge서해대교西海大橋PyeongtaekGyeonggi
Anjung JC안중분기점安中分岐點 2nd Seohaean Expressway(December 2023)
27 W Pyeongtaek IC서평택나들목西平澤나들목 National Route 8212.64285.18
28 W Pyeongtaek JC서평택분기점西平澤分岐點 Pyeongtaek–Jecheon Expressway
Pyeongtaek-Siheung Expressway
6.53291.71
29 Baran IC발안나들목發安나들목 National Route 397.82299.53Hwaseong
29-1 Paltan JC팔탄분기점八灘分岐點 Seoul 2nd Belt Expressway
SA Hwaseong SA화성휴게소華城休憩所
30 Bibong IC비봉나들목飛鳳나들목 National Route 3913.62313.15
SA Maesong SA매송휴게소梅松休憩所
31 Maesong IC매송나들목梅松나들목Local Route 844.02317.17
31-1 Palgok JC팔곡분기점八谷分岐點 Yeongdong Expressway3.80320.97Mokpo-bound enter only
Gangneung-bound exit only
Ansan
32 Ansan JC안산분기점安山分岐點 Yeongdong Expressway5.12326.09
TG W. Seoul TG서서울요금소西서울料金所Main Tollgate
33 Jonam JC조남분기점鳥南分岐點 Seoul Ring Expressway2.89328.98Siheung
SA Mokgam SA목감간이휴게소牧甘簡易休憩所Seoul-bound only
34 Mokgam IC목감나들목牧甘나들목 National Route 42
Suwon–Munsan Expressway
3rd Gyeongin Highway
3.16332.14
35 Gwangmyeong Stn. IC광명역나들목光明驛나들목Ori-ro
KTX Gwangmyeong Stn.
1.15333.29Anyang
36 Iljik JC일직분기점日直分岐點 2nd Gyeongin Expressway2.67335.96Gwangmyeong
37 Soha JC소하분기점所下分岐點 Suwon-Munsan Expressway
Gangnam Beltway
Gangnam-bound only
Mokpo-bound only
GeumcheonSeoul
38 Geumcheon IC금천나들목衿川나들목National Route 1
Doksan Station ( Line 1)
4.20340.16Seoul-bound enter only
Mokpo-bound exit only
Seoul서울 종점서울 終點Seobu Urban Expressway0.65340.81
Connected directly with Seobu Urban Expressway(서부간선도로)

Events

MBC's Entertainment program, Infinite Challenge held a <Seohaean Expressway Festival> in Haengdam Island Service area in June 2011.

See also

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