# National Route 40 (South Korea)

National Route 40 is a national highway in South Korea connects Dangjin to Gongju. It established on 14 March 1981

## Main stopovers

* South Chungcheong
Dangjin- Yesan County- Hongseong County- Boryeong- Buyeo County- Gongju

## Major intersections

IC: Interchange
| Name | Hangul name | Connections | Location | Location | Note |
| Directly connected with Prefectural Route 622 ||||||
| (Under Unsan 1 bridge) | (운산1교 하부) | National Route 32 Prefectural Route 622 | Dangjin | Hapdeok-eup | Terminus |
| Jaeoh Ridge entrance | | | Dangjin | Hapdeok-eup | |
| Godeok IC | 고덕 나들목 | Dangjin-Yeongdeok Expressway | Yesan County | Godeok-myeon | |
| Daecheon Intersection | 대천 교차로 | Prefectural Route 619 | Yesan County | Godeok-myeon | |
| Daeji Intersection | 대지사거리 | Prefectural Route 618 Prefectural Route 619 | Yesan County | Godeok-myeon | |
| Godeok Middle School | 고덕중학교 | | Yesan County | Godeok-myeon | |
| Daeji Intersection | 대지삼거리 | Godeokjungang-ro | Yesan County | Bongsan-myeon | |
| Hapyeong Intersection | 하평삼거리 | Bongsan-ro | Yesan County | Bongsan-myeon | |
| No name | (이름 없음) | Yedeok-ro | Yesan County | Bongsan-myeon | |
| Eubnae Intersection | 읍내 교차로 | Prefectural Route 609 (Deoksanoncheon-ro) Bonggun-ro Chungui-ro | Yesan County | Bongsan-myeon | |
| Songshan Intersection | 송산 교차로 | National Route 45 Prefectural Route 70 (Yun Bong-gil) Prefectural Route 609 (Docheong-daero) | Yesan County | Sapgyo-eup | |
| Sinri Bridge | 신리대교 | | Yesan County | Sapgyo-eup | |
| Deoksan Hot Spring Intersection | 덕산온천 교차로 | Deoksan Hot Spring | Yesan County | Deoksan-myeon | |
| Sudeoksa Intersection | 수덕사 교차로 | National Route 45 Prefectural Route 70 (Yun Bong-gil) Sudeoksa-ro | Yesan County | Deoksan-myeon | |
| Sudeoksa Entrance | 수덕사입구 | | Yesan County | Deoksan-myeon | |
| Oera Intersection | 외나사거리 | Hongdeokseo-ro | Yesan County | Deoksan-myeon | |
| Sudeok Elementary School | 수덕초등학교 | | Yesan County | Deoksan-myeon | |
| Guseong Bridge | 구성교 | | Yesan County | Deoksan-myeon | |
| Gagok Elementary School (closed) | 가곡초등학교(폐교) | | Hongseong | Galsan-myeon | |
| Hongseong IC | 홍성 나들목 | Seohaean Expressway National Route 29 Galsan-ro | Hongseong | Galsan-myeon | |
| Sangchon Intersection | 상촌교차로 | National Route 29 Sangchon-ro Walyong-ro | Hongseong | Galsan-myeon | |
| Galsan Intersection | 갈산교차로 | Baekya-ro | Hongseong | Galsan-myeon | |
| Galsan tunnel | 갈산터널 | | Hongseong | Galsan-myeon | 390m long |
| Odu Intersection | 오두교차로 | Galsanseo-gil | Hongseong | Galsan-myeon | |
| Gwangri Intersection | 광리교차로 | Prefectural Route 96 (Cheonsuman-ro) Seobuseo road | Hongseong | Seobu-myeon | |
| Miho Intersection | 이호삼거리 | Walyong-ro Yihogil | Hongseong | Seobu-myeon | |
| Hongseong West Middle School | 홍성서부중학교 | | Hongseong | Seobu-myeon | |
| No name | (이름 없음) | Hongnamseo-ro 285 beon-gil | Hongseong | Seobu-myeon | |
| Gongchon Intersection | 송촌삼거리 | Prefectural Route 96 (Hongnamseo-ro) | Hongseong | Seobu-myeon | |
| No name | (이름 없음) | Seobu-ro 43 beon-gil | Hongseong | Seobu-myeon | |
| Eosa Intersection | 어사교차로 | Namdanghang-ro | Hongseong | Seobu-myeon | |
| Eosa-ri bus stop | 어사리정류소 | | Hongseong | Seobu-myeon | |
| Naedongma Village Entrance | 내동마을입구 | Namdanghang-ro 264 beon-gil | Hongseong | Seobu-myeon | |
| Namdang Port | 남당항 | | Hongseong | Seobu-myeon | |
| Anheungdong Intersection | 안흥동삼거리 | Hongbo-ro | Hongseong | Seobu-myeon | |
| Hongseong seawall Intersection | 홍성방조제삼거리 | Imhae-ro | Hongseong | Seobu-myeon | |
| Hongseong Bridge | 홍성교 | | Hongseong | Seobu-myeon | |
| Hongseong seawall | 홍성방조제 | | Boryeong | Cheonbuk-myeon | |
| Cheonbuk Intersection | 천북삼거리 | Hagung road | Boryeong | Cheonbuk-myeon | |
| Haman Intersection | 하만삼거리 | Prefectural Route 622 (Cheongwang-ro) | Boryeong | Cheonbuk-myeon | |
| Boryeong Bridge Boryeong seawall | 보령교 보령방조제 | | Boryeong | Cheonbuk-myeon | |
| Soseong Intersection | 소성삼거리 | Prefectural Route 610 (Chungcheonsuyeong-ro) | Boryeong | Ocheon-myeon | |
| Sinchon Intersection | 신촌삼거리 | Prefectural Route 610 (Domihang-ro) | Boryeong | Ocheon-myeon | |
| Galhyeon Entrance | 갈현입구 | Dolgogae-gil | Boryeong | Cheongso-myeon | |
| Magang 2 | 마강2리앞 | Oncheonjungang-ro | Boryeong | Jupo-myeon | |
| Oncheonwaseon Bridge | 오천과선교 | | Boryeong | Jupo-myeon | |
| Jupo Intersection | 주포사거리 | National Route 21 (Chungseo-ro) Bỏyeongeupseong-gil | Boryeong | Jupo-myeon | |
| Bongdang Intersection | 봉당삼거리 | | Boryeong | Jupo-myeon | |
| Gwangsan Intersection | 관산사거리 | Yupoyeok-gil | Boryeong | Jupo-myeon | |
| Chungseo-ro Intersection | 충서로사거리 | | Boryeong | Jupo-myeon | |
| Jugyo Intersection | 주교사거리 | Prefectural Route 610 (Ulgyekeun-gil) | Boryeong | Jupo-myeon | |
| Gwanchang Intersection | 관창교차로 | Boryeongbuk-ro | Boryeong | Jugyo-myeon | |
| Bonghwang tunnel | 봉황터널 | | Boryeong | Daecheon-dong | |
| Hwasan Intersection | 화산교차로 | National Route 36 National Route 77 (Daecheong-ro) | Boryeong | Daecheon-dong | |
| Yeongcheon Intersection | 명천교차로 | National Route 21 National Route 77 (Chungseo-ro) | Boryeong | Daecheon-dong | |
| Seongju tunnel | 성주터널 | | Boryeong | Daecheon-dong | 720m long |
| Seongju Intersection | 성주삼거리 | Simwongyegong-ro | Boryeong | Seongju-myeon | |
| Boryeong Coal Museum | 보령석탄박물관 | | Boryeong | Seongju-myeon | |
| Gawha Arts Park | 개화예술공원 | | Boryeong | Seongju-myeon | |
| Chungcheongnamgaehwa Elementary School | 충남개화초등학교 | | Boryeong | Seongju-myeon | |
| Gaewa Intersection | 개화삼거리 | Prefectural Route 606 (Mansu-ro) | Boryeong | Seongju-myeon | |
| Dowhadam Elementary School (closed) | 도화담초등학교(폐교) | | Boryeong | Misan-myeon | |
| Dohwadam Intersection | 도화담삼거리 | Prefectural Route 617 | Boryeong | Misan-myeon |
| Sulibawi Intersection | 수리바위삼거리 | Oesan-ro | Buyeo County | Oesan-myeon |
| Oesan Intersection | 외산사거리 | Prefectural Route 606 (Mansu-ro) | Buyeo County | Oesan-myeon |
| Jiti Intersection | 지티교앞 | Prefectural Route 613 (Sabi-ro) | Buyeo County | Naesan-myeon | |
| Minam Intersection | 미암교차로 | Seongchung-ro | Buyeo County | Naesan-myeon | |
| Juam Intersection | 주암 교차로 | Sukdong-ro | Buyeo County | Naesan-myeon | |
| Unchi Intersection | 운치교차로 | Seongchung-ro jilmajae-gil | Buyeo County | Naesan-myeon | |
| Julam Intersection | 율암 교차로 | Seongchung-ro | Buyeo County | Naesan-myeon | |
| Yulam Bridge | 율암교 | | Buyeo County | Naesan-myeon | |
| Yonggang Middle School | 용강중학교 | | Buyeo County | Guryong-myeon | |
| Gulyong Intersection | 구룡삼거리 | Heungsu-ro | Buyeo County | Guryong-myeon | |
| Sujeong Intersection | 주정삼거리 | National Route 4 Prefectural Route 723 (Daebaekje-ro) | Buyeo County | Guryong-myeon | |
| Meoggogae Intersection | 먹고개삼거리 | Prefectural Route 723 (Chungui-ro) | Buyeo County | Guryong-myeon | |
| Gubong Intersection | 구봉교차로 | National Route 4 (Daebaekje-ro) Heungsu-ro | Buyeo County | Guryong-myeon | |
| Hapsong Intersection | 합송교차로 | Hapsongseo-ro | Buyeo County | Gyuam-myeon |
| Naeli Intersection | 내리 교차로 | National Route 29 National Route 39 (Gyuamuhoedo-ro) | Buyeo County | Gyuam-myeon | |
| Gyuam Intersection | 규암 교차로 | Prefectural Route 625 (Chungjeol-ro) | Buyeo County | Gyuam-myeon | |
| Buyeodae Bridge | 부여대교 | | Buyeo County | Gyuam-myeon |
| Buyeodae Bridge | | | Buyeo County | Buyeo-eup |
| Buyeo Intersection | 부여 교차로 | Seongwang-ro | Buyeo County | Buyeo-eup |
| Daewang Intersection | 대왕 교차로 | Geumseong-ro | Buyeo County | Buyeo-eup |
| Gatap Intersection | 가탑 교차로 | National Route 4 (Daebaejek-ro) | Buyeo County | Buyeo-eup |
| Dongmun Intersection | 동문삼거리 | Gatap-ro | Buyeo County | Buyeo-eup | |
| Roundabout | 대향로로터리 | Bukpo-ro Seongwang-ro | Buyeo County | Buyeo-eup | |
| Yongjeong Intersection | 용정교차로 | Samchung-ro | Buyeo County | Buyeo-eup | |
| Jeongdong Intersection | 정동교차로 | Prefectural Route 625 (Baekjemun-ro) | Buyeo County | Buyeo-eup | |
| Jawang Intersection | 자왕교차로 | Samchung-ro | Buyeo County | Buyeo-eup | |
| Sinjeong Intersection | 신정교차로 | Bukpo-ro | Buyeo County | Buyeo-eup | |
| Wangjin Intersection | 왕진교차로 | Prefectural Route 645 (Wangjin-ro) | Buyeo County | Buyeo-eup | |
| Joseok Intersection | 저석교차로 | Prefectural Route 651 (Baekjekeung-gil) | Buyeo County | Buyeo-eup | |
| Ochon Intersection | 오촌교차로 | Prefectural Route 651 (Baekjekeung-gil) | Buyeo County | Buyeo-eup | |
| Bundang Intersection | 분강교차로 | Changam-gil | Gongju | Tancheon-myeon | |
| Seongli Intersection | 성리교차로 | Prefectural Route 645 (Deungsan-ro) | Gongju | Tancheon-myeon | |
| No name | (이름 없음) | Prefectural Route 799 (Geumbaek-ro) | Gongju | Tancheon-myeon | One way |
| Samgak Intersection | 삼각교차로 | Prefectural Route 799 (Geumbaek-ro) | Gongju | Tancheon-myeon | |
| Dalsan Intersection | 달산교차로 | Prefectural Route 96 (Geumbawi-ro) | Gongju | Iin-myeon | |
| Iin Intersection | 이인교차로 | Prefectural Route 697 (Geumgang-ro) | Gongju | Iin-myeon | |
| Jubong Intersection | 주봉교차로 | Geombawi-ro | Gongju | Iin-myeon | |
| Taebong Intersection | 태봉교차로 | Ugeumti-ro | Gongju | Geumhak-dong |
| Bongjeong Intersection | 봉정교차로 | Ugeumti-ro | Gongju | Geumhak-dong | |
| Namgyeongju IC | 남공주 나들목 | Nonsan–Cheonan Expressway | Gongju | Geumhak-dong | |
| Geomsang Intersection | 검상교차로 | Geomsangan-gil | Gongju | Geumhak-dong | |
| Saejae Intersection | 새재교차로 | | Gongju | Geumhak-dong | |
| Intersection (front of the police station) | 경찰서앞교차로 | Muryeong-ro | Gongju | Ungjin-dong |
| Gongju Art & Culture Center | 공주문예회관 | Gomanalu-gil | Gongju | Ungjin-dong | |
| Gongju Middle School Gongju Office of Education Tomb | 공주중학교 공주교육지원청 왕릉교 | | Gongju | Ungjin-dong | |
| Gongsanseong Roundabout | 공산성 회전교차로 | Ungjin-ro | Gongju | Ungjin-dong | |
| Gongsanseong Fortress | 공산성 | | Gongju | Ungjin-dong |
| Geumgang Bridge | 금강교 | | Gongju | Ungjin-dong |
| Geumgang Bridge | | National Route 32 Prefectural Route 96 (Geumbyeok-ro) Uidang-ro | Gongju |
| Jeonmak Intersection | 전막 교차로 | National Route 32 Prefectural Route 96 (Geumbyeok-ro) Uidang-ro | Gongju | Singwan-dong | Terminus |