History
• August 31, 1971: By the National Highway Route Designation Decree, it became the Uiseong–Pohang line of National Route 28. • March 14, 1981: The starting point was extended from Uiseong-eup, Uiseong County, Gyeongsangbuk-do to Yeongju City, and thus the route changed from the "Uiseong–Pohang Line" to the "Yeongju–Pohang Line." • May 8, 1981: An 84.9 km section upgraded to a national road — from Yeongju-dong, Yeongju City to Hajeon-dong, Bongyang-myeon, Uiseong County — opened. • May 30, 1981: Road zone changed to the extended 82 km section under the amendment of Presidential Decree No. 10247, General National Route Designation Decree. • January 12, 1996: The Uiheung Bypass (Suseo-ri ~ Eumnae-ri, Uiheung-myeon, Gunwi County) 3.67 km section opened. • June 16, 1997: The Gangdong–Heunghae road (Yugeum-ri, Gangdong-myeon, Gyeongju City ~ Seonggok-ri, Heunghae-eup, Pohang Buk-gu) 12.7 km section was expanded and opened. • February 24, 2000: The 10.0 km Yeongju (Munjeong-dong)–Pori (Gamcheon-myeon) section in Gyeongsangbuk-do was designated as a motorway. The 19.0 km Gimhae section (Hanlim-myeon, Toerae-ri–Bulam-dong) was designated as a motorway. The 22.8 km Yeongcheon section (Geumho-eup Gyodae-ri–Gogyeong-myeon Sangdeok-ri) was designated as a motorway. • July 14, 2000: The 1.2 km section from Gawon-ri to Songho-ri, Dain-myeon, Uiseong County opened, and the existing 1.1 km section was abolished. • December 31, 2000: The 800 m section on the Gunwi–Uiseong road (Sechon-ri, Danchon-myeon, Uiseong County) was expanded and opened. • January 22, 2001: The Daeryeon Intersection (Daeryeon-ri) on the Gangdong–Heunghae road in Heunghae-eup, Pohang Buk-gu was opened as a grade-separated interchange. • May 10, 2001: The 4.12 km section from Sohwa-ri to Majon-ri, Jibo-myeon, Yecheon County was widened and opened; the existing 4.1 km section was abolished. • December 23, 2001: The 1.98 km Uiseong–Geumseong–Cheongro hazardous-road improvement (Cheongro-ri, Geumseong-myeon, Uiseong County) opened and the existing 1.78 km section was abolished. • September 19, 2002: The 3.84 km Yeongju–Galsan section (Munjeong-dong, Yeongju City ~ Galsan-ri, Jangsu-myeon) was expanded and opened. • September 26, 2002: The 13.7 km Gangdong–Heunghae section (Gangdong-myeon, Gyeongju City ~ Seonggok-ri, Heunghae-eup, Pohang Buk-gu) was expanded and opened. • January 1, 2004: The 3.0 km Gwanho Bridge section at the Gwanho Intersection (Gwanho-ri ~ Murim-ri, Yakmok-myeon, Chilgok County) opened; the Gadong level crossing (Sang-ri, Yechon-eup ~ Geum-ri, Gaepo-myeon) was grade-separated and a 1.34 km section opened, and the existing 840 m section was abolished. • September 25, 2004: The 3.4 km Yeongju–Gamcheon section (Galsan-ri, Jangsu-myeon, Yeongju City ~ Yuri, Gamcheon-myeon, Yecheon County) was expanded and opened. • December 28, 2004: The 14.14 km expansion of the Yeongcheon bypass (Geumho–Imgo and Yeongcheon–Gogyeong sections: Daejeon-dong, Yeongcheon City ~ Sangdeok-ri, Gogyeong-myeon) opened. • June 30, 2005: The 13.2 km Yeongju–Gamcheon section (Gahung-dong, Yeongju City ~ Pori, Gamcheon-myeon, Yecheon County) was expanded and opened, and the existing 13.9 km section was abolished. • December 30, 2005: The 9.92 km Bian–Bongyang section (Idu-ri, Bian-myeon ~ Hwajeon-ri, Bongyang-myeon, Uiseong County) was expanded and opened; the existing 11.5 km section was abolished. • September 17, 2009: The 10.6 km Gamcheon–Yecheon section (Pori, Gamcheon-myeon ~ Cheongbok-ri, Yecheon-eup) was designated as a motorway. • December 23, 2009: The 10.6 km Gamcheon–Yecheon section (Pori, Gamcheon-myeon ~ Cheongbok-ri, Yecheon-eup) was expanded and opened; the existing 13.9 km section (Pori, Gamcheon-myeon ~ Jinae-ri, Yecheon-eup) was abolished. • December 27, 2011: Section 1 of the Sinnyeong–Yeongcheon Road (Hwanam-ri, Sinnyeong-myeon, Yeongcheon City ~ Deokam-ri, Hwasan-myeon) 9.5 km was expanded and opened, and the existing section was abolished; Section 2 (Deokam-ri, Hwasan-myeon ~ Seosandong) 8.84 km was expanded and opened, and the existing 9.1 km section was abolished. Also, the Sinnyeong–Goro road (Hwanam-ri, Sinnyeong-myeon ~ Hwasu-ri, Goro-myeon, Gunwi County) 5.54 km was expanded and opened, and the existing 6.3 km section was abolished. • December 21, 2016: Section 2 of the Dain–Bian Road (Sambun-ri, Dain-myeon ~ Idu-ri, Bian-myeon, Uiseong County) 12.6 km was expanded and opened; the existing 12.4 km section was abolished. • December 20, 2018: Section 1 of the Dain–Bian Road (Deokmi-ri ~ Sambun-ri, Dain-myeon, Uiseong County) 10.94 km was expanded and opened; the existing 10.88 km section was abolished. • March 29, 2021: The 2.0 km Goro–Ubo section (Hwasu-ri, Samgukyusa-myeon, Gunwi County ~ Ihwa-ri, Ubo-myeon) was expanded and opened; the existing 340 m section in Ihwa-ri, Ubo-myeon, Gunwi County was abolished. ==Main stopovers==