National Route 20 is a national highway in South Korea connects Sancheong to Pohang. It was established on 14 March 1981.대통령령 제10247호 일반국도노선지정령, 1981년 3월 14일 일부개정.

History March 14, 1981: National Route 20 Sicheon ~ Gyeongju Line newly establishedPresidential Decree No. 10247 General National Highway Route Designation Decree, partially amended on March 14, 1981. May 8, 1981: Geumgok-dong, Punggak-myeon, Cheongdo-gun ~ Geoncheon-ri, Geoncheon-eup, Wolseong-gun 79.7 km section upgraded to national highway openedDaegu Regional Land Management Office Announcement No. 17, May 8, 1981. May 12, 1981: Jungsan-ri, Sicheon-myeon, Sancheong-gun ~ Bang-ri, Seongsan-myeon, Changnyeong-gun 136.473 km section upgraded to national highway openedBusan Regional Land Management Office Announcement No. 14, May 12, 1981. May 30, 1981: Road zone determined for newly established 186 km section according to the amendment of Presidential Decree No. 10247 General National Highway Route Designation DecreeMinistry of Construction Notice No. 191, May 30, 1981. March 11, 1989: Old road sites in Seongsori, Bonchori, Youeo-myeon, Changnyeong-gun area abolishedBusan Regional Land Management Office Announcement No. 25, March 11, 1989. July 1, 1996: End point extended from 'Gyeongju-si, Gyeongsangbuk-do' to 'Pohang-si, Gyeongsangbuk-do'. Accordingly became 'Sancheong ~ Pohang Line'.Presidential Decree No. 15101 General National Highway Route Designation Decree, partially amended on July 1, 1996. May 23, 1998: Songgye Bridge (Gagye-ri, Saengbiryang-myeon, Sancheong-gun) 1.5 km section newly opened, existing 850m section abolishedBusan Regional Land Management Office Announcement No. 1998-176, May 23, 1998. June 10, 1999: Chilgok Bypass Road (Dosan-ri ~ Sinpo-ri, Chilgok-myeon, Uiryeong-gun) 1 km section opened, existing section abolishedBusan Regional Land Management Office Announcement No. 1999-126, June 10, 1999.Busan Regional Land Management Office Announcement No. 1999-159, July 21, 1999. July 19, 1999: Cheongdo Bridge (Beomgok-ri, Hwayang-eup ~ Wonjeong-ri, Cheongdo-eup, Cheongdo-gun) 3.22 km section opened, existing 7 km section abolishedBusan Regional Land Management Office Announcements No. 1999-153, No. 1999-154, July 15, 1999. September 3, 1999: Daeui Bypass Road (Chusan-ri ~ Massang-ri, Daeui-myeon, Uiryeong-gun) 2.37 km section openedBusan Regional Land Management Office Announcement No. 1999-200, September 2, 1999. December 30, 1999: Saengbiryang Bypass Road (Oedo-ri ~ Dodong-ri, Saengbiryang-myeon, Sancheong-gun) 1.387 km section opened, existing 730m section abolishedBusan Regional Land Management Office Announcement No. 1999-284, December 27, 1999. December 1999: Geoncheon Western Bypass Road 2.8 km section opened among Geoncheon ~ Pohang Road February 24, 2000: Cheonpo-ri, Geoncheon-eup, Gyeongju-si, Gyeongsangbuk-do ~ Jangheung-dong, Nam-gu, Pohang-si 32.9 km section designated as automobile-only roadBusan Regional Land Management Office Announcement No. 2000-16, February 24, 2000. August 18, 2000: Burim Bypass Road (Seganri, Yugok-myeon ~ Gamam-ri, Burim-myeon, Uiryeong-gun) 4.29 km section opened, existing 2.6 km section abolishedBusan Regional Land Management Office Announcements No. 2000-202, No. 2000-203, July 31, 2000. October 13, 2001: Danseong Bypass Road (Sawol-ri ~ Gangnu-ri, Danseong-myeon, Sancheong-gun) 4.637 km section opened,Busan Regional Land Management Office Announcement No. 2001-209, October 15, 2001. existing 4.2 km section abolishedBusan Regional Land Management Office Announcement No. 2001-210, October 15, 2001. September 13, 2002: Sicheon Bypass Road (Won-ri ~ Sa-ri, Sicheon-myeon, Sancheong-gun) 3.56 km section expansion opening,Busan Regional Land Management Office Announcement No. 2002-274, September 12, 2002. existing Oegong-ri ~ Sa-ri, Sicheon-myeon, Sancheong-gun 3.7 km section abolishedBusan Regional Land Management Office Announcement No. 2002-275, September 12, 2002. January 1, 2003: Punggak Bypass Road (Heukseok-ri, Punggak-myeon ~ Sindang-ri, Gangnam-myeon, Cheongdo-gun) 4.17 km section openedBusan Regional Land Management Office Announcement No. 2002-379, January 6, 2003. May 16, 2003: Cheonbuk ~ Pohang section among Geoncheon ~ Pohang Road (Sabang-ri, Angang-eup ~ Wangsin-ri, Gangdong-myeon, Gyeongju-si) 6.7 km section expansion openingBusan Regional Land Management Office Announcement No. 2003-118, May 19, 2003. December 4, 2003: Geumcheon Bypass Road (Donggok-ri, Geumcheon-myeon ~ Bangji-ri, Unmun-myeon, Cheongdo-gun) 4.4 km section openedBusan Regional Land Management Office Announcement No. 2003-337, December 4, 2003. September 24, 2004: Hwayang ~ Cheongdo Road (Seosang-ri ~ Beomgok-ri, Hwayang-eup, Cheongdo-gun) 2.52 km section expansion opening, existing 1 km section abolishedBusan Regional Land Management Office Announcement No. 2004-254, September 30, 2004. December 29, 2004: With the opening of Gangdong ~ Pohang section 9.2 km, Geoncheon IC ~ Hyeongok 6.0 km section, Hyeongok ~ Cheonbuk 8.0 km section among Geoncheon ~ Pohang Road, entire Geoncheon ~ Pohang Road (Cheonpo-ri, Geoncheon-eup, Gyeongju-si ~ Jenae-ri, Daesong-myeon, Nam-gu, Pohang-si) 33.1 km section openedBusan Regional Land Management Office Announcement No. 2004-331, December 27, 2004. July 20, 2006: Geumgok-ri, Punggak-myeon, Cheongdo-gun 600m section alignment improvement opening, existing 420m section abolishedBusan Regional Land Management Office Announcement No. 2006-105, July 27, 2006. June 19, 2008: Due to Geoncheon Western Bypass Road opening, existing Cheonpo-ri ~ Jojeon-ri, Geoncheon-eup, Gyeongju-si 1.3 km section abolishedBusan Regional Land Management Office Announcement No. 2008-131, June 19, 2008. September 13, 2010: Chilgok ~ Garye Road (Sinpo-ri, Chilgok-myeon ~ Garye-ri, Garye-myeon, Uiryeong-gun) 4.33 km section expansion openingBusan Regional Land Management Office Announcement No. 2010-183, September 10, 2010. January 1, 2011: Due to Chilgok ~ Garye Road opening, existing Sinpo-ri, Chilgok-myeon ~ Garye-ri, Garye-myeon, Uiryeong-gun 3.0 km section abolishedBusan Regional Land Management Office Announcement No. 2011-4, January 11, 2011. June 30, 2013: Namcheon ~ Cheongdo Road Section 1 and Gomtijae Tunnel (Buya-ri, Cheongdo-eup ~ Deoksan-ri, Maejeon-myeon, Cheongdo-gun) 4.88 km section expansion openingBusan Regional Land Management Office Announcement No. 2013-122, June 19, 2013.National Route 25 Cheongdo~Gyeongsan section and National Route 20 Gomtijae section open, Newsis, written June 30, 2013. August 29, 2013: Due to Namcheon ~ Cheongdo Road Section 1 and Gomtijae Tunnel opening, existing Buya-ri, Cheongdo-eup ~ Deoksan-ri, Maejeon-myeon, Cheongdo-gun 4.76 km section abolishedBusan Regional Land Management Office Announcement No. 2013-178, August 28, 2013. December 1, 2014: Daeui ~ Chilgok Road (Daeui Intersection, Massang-ri, Daeui-myeon ~ Chilgok Intersection, Oejo-ri, Chilgok-myeon, Uiryeong-gun) 8.256 km section expansion opening, existing Dasa-ri, Daeui-myeon ~ Sanbuk-ri, Chilgok-myeon, Uiryeong-gun 4.63 km section abolishedBusan Regional Land Management Office Announcement No. 2014-218, November 26, 2014.Uiryeong Daeui~Chilgok National Route 20 expansion opening, Gyeongnam Shinmun, written December 2, 2014. December 19, 2014: Punggak ~ Hwayang Road (Sindang Intersection, Sindang-ri, Gangnam-myeon ~ Hapcheon Three-way Intersection, Seosan-ri, Hwayang-eup, Cheongdo-gun) 6.5 km section expansion opening,Busan Regional Land Management Office Announcement No. 2014-234, January 19, 2015.Gyeongbuk Cheongdo-gun Punggak ~ Hwayang National Highway 4-lane fully opened , Busan Regional Land Management Office Official Blog, written December 18, 2014.Cheongdo Punggak~Hwayang National Highway construction completed, Gyeongbuk Domin Ilbo, written December 22, 2014. existing Sindang-ri ~ Chilseong-ri, Gangnam-myeon, Cheongdo-gun 4.2 km section abolishedBusan Regional Land Management Office Announcement No. 2014-235, January 19, 2015. December 29, 2014: Saengbiryang ~ Ssangbaek Road (Dori ~ Gagye-ri, Saengbiryang-myeon, Sancheong-gun) 3.4 km section expansion opening, existing section abolishedBusan Regional Land Management Office Announcement No. 2014-252, January 5, 2015. March 27, 2015: Starting point changed from Won-ri Intersection, Sicheon-myeon, Sancheong-gun to Jungsan-ri, Sicheon-myeonMinistry of Land, Infrastructure and Transport Notice No. 2015-181, March 27, 2015. January 16, 2017: Boncho-ri, Daeji-myeon, Changnyeong-gun 440m section improvement opening, existing 500m section abolishedBusan Regional Land Management Office Announcement No. 2017-7, January 12, 2017. July 31, 2017: Uiryeong ~ Jeonggok Road (Ungok-ri, Yongdeok-myeon ~ Jukjeon-ri, Jeonggok-myeon, Uiryeong-gun) 4.7 km section improvement opening,Busan Regional Land Management Office Announcement No. 2017-151, August 2, 2017. existing 3.9 km section abolishedBusan Regional Land Management Office Announcement No. 2017-152, August 2, 2017. December 21, 2021: Jukjeon District dangerous road (Jukjeon-ri, Jeonggok-myeon, Uiryeong-gun) 200m section improvement opening,Busan Regional Land Management Office Announcement No. 2021-270, December 30, 2021. existing section abolishedBusan Regional Land Management Office Announcement No. 2021-271, December 30, 2021.

Main stopovers

South Gyeongsang Province Sancheong County - Uiryeong County - Hapcheon County - Changnyeong County North Gyeongsang Province Cheongdo County - Gyeongju - Pohang

Major intersections

(■): Motorway IS: Intersection, IC: Interchange

South Gyeongsang Province