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Seohaean Expressway

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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
서해안고속도로
Hanja
Revised RomanizationSeohaean Gosok Doro
McCune–ReischauerSŏhaean Kosok Toro
Seohae Bridge
Haengdamdo Service Area

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.

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

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  • 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

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Lanes

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  • 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

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346.1 km (215.1 mi)

Speed limits

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

List of facilities

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  • IC: Interchange, JC: Junction, SA: Service area, TG:Tollgate
No. Name Korean name Hanja name Connections Distance Notes Location
Connected directly with National Route 1, National Route 2(Goha-daero)(고하대로)
Mokpo 목포 시점 木浦 始點 National Route 1
National Route 2
Mokpo Bridge
Aphae Bridge
0.0 Mokpo Jeonnam
1 Mokpo IC 목포나들목 木浦나들목 National Route 1
(Yeongsan-ro)
0.26 0.26
Jungnim JC 죽림분기점 竹林分岐點 Namhae Expressway
(Mokpo–Gwangyang)
National Route 2
Jeonnam Provincial Office
Mokpo Airport
3.90 4.16 Muan
2 Illo IC 일로나들목 一老나들목 Local Route 815 2.10 6.26
TG Mokpo TG 목포요금소 木浦料金所 Main Tollgate
3 Muan IC 무안나들목 務安나들목 National Route 1 17.28 23.54
4 Hampyeong JC 함평분기점 咸平分岐點 Muan-Gwangju Expressway
Muan International Airport
2.46 26.00 Hampyeong
SA Hampyeong
-cheonji SA
함평천지휴게소 咸平天地休憩所 Mokpo-bound only
5 Hampyeong IC 함평나들목 咸平나들목 National Route 23 7.81 33.81
SA Hampyeong
-cheonji SA
함평천지휴게소 咸平天地休憩所 Seoul-bound only
5-1 SA Bulgapsan Yeonggwang SA 부안고려청자휴게소 Muan-bound only (temporary rest area, no gas station)
Hi-pass exclusive interchange
Yeonggwang
6 Yeonggwang IC 영광나들목 靈光나들목 National Route 23 24.33 58.14
7 Gochang JC 고창분기점 高敞分岐點 Gochang-Damyang Expressway 16.06 74.20 Gochang Jeonbuk
8 Gochang IC 고창나들목 高敞나들목 Local Route 15 2.74 76.94
SA Gochang Goindol SA 고창고인돌휴게소 高敞고인돌休憩所
9 Seonunsan IC 선운산나들목 禪雲山나들목 National Route 22
Seonunsa
7.91 84.85
10 Julpo IC 줄포나들목 茁浦나들목 Local Route 710 9.87 94.72 Buan
11 Buan IC 부안나들목 扶安나들목 National Route 30 16.18 110.90
12 W Gimje IC 서김제나들목 西金堤나들목 National Route 29
Saemangeum-Jeonju Expressway
(December 2021)
Saemangeum
13.93 124.83 Gimje
13 E Gunsan IC 동군산나들목 東群山나들목 National Route 21
National Route 26
National Route 29
12.55 137.38 Gunsan
SA Gunsan SA 군산휴게소 群山休憩所 Mokpo-bound only
14 Gunsan IC 군산나들목 群山나들목 National Route 21 8.40 145.78
SA Gunsan SA 군산휴게소 群山休憩所 Seoul-bound only
15 E Seocheon JC 동서천분기점 東舒川分岐點 Seocheon-Gongju Expressway 6.23 152.01 Seocheon Chungnam
16 Seocheon IC 서천나들목 舒川나들목 National Route 4 8.98 160.99
SA Seocheon SA 서천휴게소 舒川休憩所
17 Chunjangdae IC 춘장대나들목 春長臺나들목 National Route 21 11.91 172.90
18 Muchangpo IC 무창포나들목 武昌浦나들목 Local Route 606 8.71 181.61 Boryeong
19 Daecheon IC 대천나들목 大川나들목 National Route 36
Daecheon Beach
11.99 193.60
SA Daecheon SA 대천휴게소 大川休憩所
20 Gwangcheon IC 광천나들목 廣川나들목 Local Route 96 19.72 213.32 Hongseong
SA Hongseong SA 홍성휴게소 洪城休憩所
21 Hongseong IC 홍성나들목 洪城나들목 National Route 29 10.80 224.12
22 Haemi IC 해미나들목 海美나들목 National Route 45
Haemieupseong
13.68 237.80 Seosan
SA Seosan SA 서산휴게소 西山休憩所
23 Seosan IC 서산나들목 西山나들목 National Route 32 10.78 248.52
24 Dangjin JC 당진분기점 唐津分岐點 Dangjin-Yeongdeok Expressway 6.56 255.08 Dangjin
25 Dangjin IC 당진나들목 唐津나들목 National Route 34 9.39 264.47
26 Songak IC 송악나들목 松岳나들목 National Route 38
Dangjin Steelworks
8.07 272.54
SA Haengdam Island SA
(Ocean Park Resort)
행담도휴게소 行淡島休憩所 In the Seohae Grand Bridge
BR Seohae Bridge 서해대교 西海大橋 Pyeongtaek Gyeonggi
Anjung JC 안중분기점 安中分岐點 2nd Seohaean Expressway (December 2023)
27 W Pyeongtaek IC 서평택나들목 西平澤나들목 National Route 82 12.64 285.18
28 W Pyeongtaek JC 서평택분기점 西平澤分岐點 Pyeongtaek–Jecheon Expressway
Pyeongtaek-Siheung Expressway
6.53 291.71
29 Baran IC 발안나들목 發安나들목 National Route 39 7.82 299.53 Hwaseong
29-1 Paltan JC 팔탄분기점 八灘分岐點 Seoul 2nd Belt Expressway
SA Hwaseong SA 화성휴게소 華城休憩所
30 Bibong IC 비봉나들목 飛鳳나들목 National Route 39 13.62 313.15
SA Maesong SA 매송휴게소 梅松休憩所
31 Maesong IC 매송나들목 梅松나들목 Local Route 84 4.02 317.17
31-1 Palgok JC 팔곡분기점 八谷分岐點 Yeongdong Expressway 3.80 320.97 Mokpo-bound enter only
Gangneung-bound exit only
Ansan
32 Ansan JC 안산분기점 安山分岐點 Yeongdong Expressway 5.12 326.09
TG W. Seoul TG 서서울요금소 西서울料金所 Main Tollgate
33 Jonam JC 조남분기점 鳥南分岐點 Seoul Ring Expressway 2.89 328.98 Siheung
SA Mokgam SA 목감간이휴게소 牧甘簡易休憩所 Seoul-bound only
34 Mokgam IC 목감나들목 牧甘나들목 National Route 42
Suwon–Munsan Expressway
3rd Gyeongin Highway
3.16 332.14
35 Gwangmyeong Stn. IC 광명역나들목 光明驛나들목 Ori-ro
KTX Gwangmyeong Stn.
1.15 333.29 Anyang
36 Iljik JC 일직분기점 日直分岐點 2nd Gyeongin Expressway 2.67 335.96 Gwangmyeong
37 Soha JC 소하분기점 所下分岐點 Suwon-Munsan Expressway
Gangnam Beltway
Gangnam-bound only
Mokpo-bound only
Geumcheon Seoul
38 Geumcheon IC 금천나들목 衿川나들목 National Route 1
Doksan Station ( Line 1)
4.20 340.16 Seoul-bound enter only
Mokpo-bound exit only
Seoul 서울 종점 서울 終點 Seobu Urban Expressway 0.65 340.81
Connected directly with Seobu Urban Expressway(서부간선도로)

Events

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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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