National Route 3 (South Korea)

1970s • On 31 December 1971, the section from Sindang-dong to Cheongnyangni opened. At the same time, Seongbuk station was renamed Kwangwoon University station. • On 15 August 1974, the section from Seoul Station to Cheongnyangni began operation. At the same time, stations at Seoul Station, City Hall, Jonggak, Jongno 3-ga, and Jongno 5-ga opened. • On 10 March 1978, the section from Cheongnyangni to Seongbuk opened. 1980s • On 7 January 1981, the section from Seongbuk to Seokgye opened. • On 22 December 1985, the section from Seokgye to Seongsu opened. • On 2 September 1986, the section from Seongsu to Wangsimni opened. • On 23 December 1988, the section from Wangsimni to Gunja opened. • On 20 October 1989, the section from Gunja to Jungnang opened. 1990s • On 16 November 1991, the section from Jungnang to Mangu opened. • On 1 April 1994, the section from Mangu to Seongbuk was transferred to Seoul Metropolitan Subway Line 4. • On 15 November 1995, the section from Jungnang to Deokso opened. • On 20 March 1996, the section from Deokso to Paldang opened. • On 27 December 1996, the section from Paldang to Yangpyeong opened. • On 16 December 1997, the section from Yangpyeong to Yongmun opened. • On 15 January 1999, the section from Cheongnyangni to Seongbuk was transferred to Seoul Subway Line 6. • On 1 August 2000, the section from Yongsan to Seongbuk was transferred to the Gyeongui–Jungang Line. 2000s • On 16 December 2005, the section from Seongbuk to Sangbong opened. • On 20 December 2006, the section from Sangbong to Mangu opened. • On 16 December 2007, the section from Mangu to Deokso opened. • On 23 December 2008, the section from Deokso to Paldang opened. • On 27 December 2008, the section from Paldang to Yongmun opened. 2010s • On 21 December 2010, the section from Yongsan to Seongbuk was formally transferred to the Gyeongui–Jungang Line. • On 1 October 2011, the section from Cheongnyangni to Sangbong was transferred to Seoul Subway Line 6. • On 15 December 2012, the section from Sangbong to Mangu was transferred to Seoul Subway Line 6. • On 27 December 2013, the section from Mangu to Deokso was transferred to Seoul Subway Line 6. • On 27 December 2014, the section from Deokso to Paldang was transferred to Seoul Subway Line 6. • On 27 December 2015, the section from Paldang to Yongmun was transferred to Seoul Subway Line 6. • On 27 December 2016, the section from Yongmun to Jipyeong opened. 2020s • On 30 December 2022, the section from Paldang to Yangpyeong was electrified. • On 28 September 2023, the section from Yangpyeong to Yongmun was electrified. • On 27 December 2024, the section from Yongmun to Jipyeong was electrified. • On 30 June 2025, the section from Jipyeong to Wonju opened. ==Main stopovers==

at Goesan County ===South Korea section=== South Gyeongsang Province • Namhae County - Sacheon - Jinju - Sancheong County - Hamyang County - Geochang County North Gyeongsang Province • Gimcheon - Sangju - Mungyeong - Sangju - Mungyeong North Chungcheong Province • Goesan County - Chungju - Eumseong County Gyeonggi Province • Icheon - Yeoju - Icheon - Gwangju - Seongnam Seoul • Songpa District - Jamsil Bridge - Gwangjin District - Jungnang District - Nowon District - Dobong District Gyeonggi Province • Uijeongbu - Yangju - Dongducheon - Yeoncheon County Gangwon Province • Cheorwon County ===North Korea section=== Kangwon Province • Pyonggang County - Ichon County Hwanghae Province • Singye County - Koksan County South Pyongan Province • Yangdok County - Maengsan County - Nyongwon County North Pyongan Province • Huichon - Chosan County ==Major intersections==

• (■): Motorway IS: Intersection, IC: Interchange === South Gyeongsang Province === === North Gyeongsang Province === === North Chungcheong Province === === Gyeonggi Province (South Seoul) === . === Seoul === === Gyeonggi Province (North Seoul) === === Gangwon Province === ==References==