Seohaean Expressway

Expressway No.15
Seohaean Expressway 서해안고속도로
Route information
Length	346.1 km (215.1 mi)
Existed	1994–present
Major junctions
South end	Mokpo, Jeonnam Province () National Route 1
Major intersections	Namhae Expressway Muan-Gwangju Expressway Dangjin-Yeongdeok Expressway Pyeongtaek-Siheung Expressway Pyeongtaek-Jecheon Expressway Yeongdong Expressway Seoul Ring Expressway Second Gyeongin Expressway
North end	Geumcheon, Seoul (Geumcheon IC) Seobu Urban Expressway
Location
Major cities	Gimje, Gunsan, Boryeong, Seosan, Dangjin, Pyeongtaek, Hwaseong, Ansan, Anyang
Highway system
Highway systems of South Korea Expressways National Local

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 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[]

This article contains a bulleted list or table of intersections which should be presented in a properly formatted junction table. Please consult this guideline for information on how to create one. Please if you can. (November 2021)

• 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()(고하대로)
	Mokpo	목포 시점	木浦 始點	National Route 1 National Route 2 Aphae Bridge	–	0.0		Mokpo	Jeonnam
1		목포나들목	木浦나들목	National Route 1 (Yeongsan-ro)	0.26	0.26
		죽림분기점	竹林分岐點	Namhae Expressway (Mokpo–Gwangyang) National Route 2 Jeonnam Provincial Office Mokpo Airport	3.90	4.16		Muan
2		일로나들목	一老나들목		2.10	6.26
TG		목포요금소	木浦料金所				Main Tollgate
3		무안나들목	務安나들목	National Route 1	17.28	23.54
4		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		함평나들목	咸平나들목	National Route 23	7.81	33.81
SA	Hampyeong -cheonji SA	함��천지휴게소	咸平天地休憩所				Seoul-bound only
6		영광나들목	靈光나들목	National Route 23	24.33	58.14		Yeonggwang
7		고창분기점	高敞分岐點		16.06	74.20		Gochang	Jeonbuk
8		고창나들목	高敞나들목	Local Route 15	2.74	76.94
SA	Gochang Goindol SA	고창고인돌휴게소	高敞고인돌休憩所
9		선운산나들목	禪雲山나들목	National Route 22 Seonunsa	7.91	84.85
10		줄포나들목	茁浦나들목		9.87	94.72		Buan
11		부안나들목	扶安나들목	National Route 30	16.18	110.90
12		서김제나들목	西金堤나들목	National Route 29 Saemangeum-Jeonju Expressway (December 2021) Saemangeum	13.93	124.83		Gimje
13		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		군산나들목	群山나들목	National Route 21	8.40	145.78
SA	Gunsan SA	군산휴게소	群山休憩所				Seoul-bound only
15		동서천분기점	東舒川分岐點		6.23	152.01		Seocheon	Chungnam
16		서천나들목	舒川나들목	National Route 4	8.98	160.99
SA	Seocheon SA	서천휴게소	舒川休憩所
17		춘장대나들목	春長臺나들목	National Route 21	11.91	172.90
18		무창포나들목	武昌浦나들목		8.71	181.61		Boryeong
19		대천나들목	大川나들목	National Route 36 Daecheon Beach	11.99	193.60
SA	Daecheon SA	대천휴게소	大川休憩所
20		광천나들목	廣川나들목		19.72	213.32		Hongseong
SA	Hongseong SA	홍성휴게소	洪城休憩所
21		홍성나들목	洪城나들목	National Route 29	10.80	224.12
22		해미나들목	海美나들목	National Route 45 Haemieupseong	13.68	237.80		Seosan
SA	Seosan SA	서산휴게소	西山休憩所
23		서산나들목	西山나들목	National Route 32	10.78	248.52
24		당진분기점	唐津分岐點	Dangjin-Yeongdeok Expressway	6.56	255.08		Dangjin
25		당진나들목	唐津나들목	National Route 34	9.39	264.47
26		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
		안중분기점	安中分岐點				(December 2023)
27		서평택나들목	西平澤나들목	National Route 82	12.64	285.18
28		서평택분기점	西平澤分岐點	Pyeongtaek–Jecheon Expressway Pyeongtaek-Siheung Expressway	6.53	291.71
29		발안나들목	發安나들목	National Route 39	7.82	299.53		Hwaseong
29-1		팔탄분기점	八灘分岐點
SA	Hwaseong SA	화성휴게소	華城休憩所
30		비봉나들목	飛鳳나들목	National Route 39	13.62	313.15
SA	Maesong SA	매송휴게소	梅松休憩所
31		매송나들목	梅松나들목		4.02	317.17
31-1		팔곡분기점	八谷分岐點	Yeongdong Expressway	3.80	320.97	Mokpo-bound enter only Gangneung-bound exit only	Ansan
32		안산분기점	安山分岐點	Yeongdong Expressway	5.12	326.09
TG		서서울요금소	西서울料金所				Main Tollgate
33		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		목감나들목	牧甘나들목	National Route 42 Suwon–Munsan Expressway	3.16	332.14
35		광명역��들목	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[]

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

See also[]

• Roads and expressways in South Korea
• Transportation in South Korea
• List of Korea-related topics

External links[]

• MOLIT South Korean Government Transport Department