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National Route 42 (国道42号, Kokudō yonjūni-gō), also called Kumano Kaidō or Tropical Route is a national highway connecting Hamamatsu, Shizuoka and Wakayama, Wakayama in Japan. Part of the route requires crossing Ise Bay on the Ise-wan Ferry.[2][3] It is the 8th longest national highway in Japan.
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| 国道42号 | ||||
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| Route information | ||||
| Length | 504.6 km[1] (313.5 mi) | |||
| Existed | 1 April 1959–present | |||
| Major junctions | ||||
| East end |  National Route 1 in Hamamatsu | |||
| West end |  National Route 24 in Wakayama | |||
| Location | ||||
| Country | Japan | |||
| Highway system | ||||
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The total length on the main road is 487.2km(307.2 miles). However, by factoring in the overlapped section (33.4km/20.8 miles) and the sea crossing(19.8km/12.3 miles)the total distance becomes 540.3km(335.7miles).[4] At the origin Hamamatsu, the route starts overlapped with Route 1 and, is a junction to route 257 and 300. The route passes though the cities of Tahara, Toba, Ise, Matsusaka, Owase, Kumano, Shingū, Tanabe, and Gobō. At the terminus Wakayama, there is a junction with national route 24 and 26.
Overlapping sections
Route 42 was originally designated in January 1945 as a section of Route 41 (the Kumano Highway), which ran to Tokyo. This ran concurrent with Route 1 (now Route 1/Route 23). On 18 May 1953 Route 41 was classified as a Class 2 highway and redesignated as Route 170, which was later redesignated as Route 42 when the route was promoted to a Class 1 highway. On 1 April 1965, the classification of Class 1 and Class 2 was discontinued, redesignating it as General National Route 42.
On 1 April 1993, the highway was changed by removing the section of Tsu-Matsusaka and adding the Hamamatsu - Matsusaka. This was part of the plan to connect the Atsumi Peninsula, though the Kii Peninsula, Shikoku, Kyushu and terminating at Okinawa.[5] This plan is called the Japan Sea National Land Axis Plan.[6]
- Hamana Bypass (浜名バイパス)[7]
- Hamamatsu - Kosai
- Sanen Ise Access Road (三遠伊勢連絡道路)[8] - Planning Stage
- Hamamatsu - Ise (Mie Prefecture)
- Matsusaka - Taki Bypass (松阪多気バイパス)[9]
- Matsusaka - Taki
- Kumano - Owase Road (熊野尾鷲道路)[10]
- Owase - Kumano
- Odomari Bypass (大泊バイパス)[11]
- Kumano
- Kumano Road (熊野道路)[12]
- Kumanoo
- Kiho Bypass (紀宝バイパス)[13]
- Kiho - Shingu
- Shingu - Kiho Road (新宮紀宝道路)[14]
- Kiho - Shingu
- Nachikatsuura - Shingu Road (那智勝浦新宮道路)[15]
- Shingu - Nachikatsuura
- Kushimoto - Taiji Road (串本太地道路)[16]
- Taiji - Kushimoto
- Susami - Kushimoto Road (すさみ串本道路)[17]
- Kushimoto - Susami
- Yuasa - Gobo Road (湯浅御坊道路) - Toll Road[18]
- Gobo - Yuasa
- Hiki River Road (日置川道路)[19]
- Sasumi - Shirahama
- Tanabe Bypass (田辺バイパス)[20]
- Kamitonda - Tanabe
- West Tanabe Bypass (田辺西バイパス)[20]
- Tanabe
- Yura Bypass (由良バイパス)
- Yura - Hirogawa
- Arida Bypass (有田バイパス)
- Arida
- Shimizu Widening (冷水拡幅) - Partially Under Construction[21]
- Kainan
- Arita - Kainan Road (有田海南道路) - Partially Under Construction[21]
- Arida - Kainan
- Kainan Bypass (海南バイパス)
- Kainan
 | This article contains a bulleted list or table of intersections which should be presented in a properly formatted junction table. (November 2021) |
| Prefecture | Location | km | mi | Destinations | Notes | |
|---|---|---|---|---|---|---|
| Shizuoka | Hamamatsu |   National Route 257 / National Route 301 – Takayama, Toyota National Route 1 – Osaka, Tokyo | Overlapping section of National Route 1 | |||
| Kosai | National Route 257 / National Route 301 – Takayama, Toyota National Route 1 – Osaka, Tokyo | End of overlapping section of National Route 1 | ||||
| Aichi | Tahara | Aichi Prefectural Route 28 – Takahara | ||||
| Aichi Prefectural Route 2 – Toyohashi | ||||||
 National Route 259 – Toba,Toyohashi | Overlapping section with National Route 259 | |||||
| Ise Wan | Tahara - Toba | Ise Wan Ferry | ||||
| Mie | Toba |  National Route 167 – Shima,Ise | Overlapping section with National Route 167 | |||
| National Route 167 – Shima,Ise | End of overlapping section for National Route 167 | |||||
| Ise | Ise-Futami-toba Line - Ise | |||||
 National Route 23 – Toyohashi,Ise | ||||||
| Meiwa | Mie Prefectural Route 60 – Ise, Matsusaka | |||||
| Matsusaka | Mie Prefectural Route 59 – Matsusaka | |||||
| National Route 23 – Ise, Toyohashi | End of overlapping section with National Route 23 | |||||
| Mie Prefectural Route 60 – Ise, Matsusaka | On the Matsusaka - Taki Bypass | |||||
| Mie Prefectural Route 37 – Toba, Matsusaka | On the Matsusaka - Taki Bypass | |||||
| Mie Prefectural Route 59 – Matsusaka | On the Matsusaka - Taki Bypass | |||||
| Mie Prefectural Route 59 – Matsusaka | On the Matsusaka - Taki Bypass | |||||
| Mie Prefectural Route 59 – Matsusaka | ||||||
| Mie Prefectural Route 59 – Matsusaka | ||||||
| Taki | Mie Prefectural Route 13 – Ise,Taki | |||||
 Ise Expressway - Ise,Tsu  Kisei Expressway - Taki,Owase | Seiwa-Taki Interchange | |||||
 National Route 368 – Iga, Taki | ||||||
| Odai | Mie Prefectural Route 46 – Minamiise,Odai | |||||
| Mie Prefectural Route 31 – Odai | ||||||
| Kisei Expressway - Taki,Owase | Omiya - Odai Interchange | |||||
| Taiki | Mie Prefectural Route 38 – Taiki,Ise | |||||
| Mie Prefectural Route 33 – Taiki,Ise | ||||||
| Mie Prefectural Route 68– Taiki | Connecting to Kisei Expressway - Taki,Owase | |||||
| Kihoku |  National Route 260 – Kihoku, Shima | |||||
 National Route 422 – Otsu, Kihoku | ||||||
| National Route 422 – Otsu, Kihoku | ||||||
| Kisei Expressway - Taki,Owase | Miyama Interchange | |||||
| Owase |  National Route 425 – Owase, Gobo | |||||
 National Route 311 – Owase, Kamitonda | ||||||
| Mie Prefectural Route 70 – Owase | ||||||
| Mie Prefectural Route 70 – Owase | On the Kumano Owase Road (Bypass) | |||||
| Kumano |  National Route 309 – Osaka, Kumano | |||||
| National Route 311 – Owase, Kamitonda | Overlapping section with National Route 311 | |||||
| Mie Prefectural Route 34 – Kumano | ||||||
| National Route 311 – Owase, Kamitonda | End of overlapping section of National Route 311 | |||||
| Mihama | Mie, Wakayama Prefectural Route 52 – Mihama,Kitayama | |||||
| Mie Prefectural Route 62 – Mihama,Kumano | ||||||
| Kiho | Mie Prefectural Route 35 – KIho,Mihama | On Kiho Bypass | ||||
| Wakayama | Shingu | Wakayama Prefectural Route 42 – Shingu | ||||
 National Route 168 – Shingu, Hirakata | ||||||
| Nachikatsuura | Wakayama Prefectural Route 43 – Nachikatsuura,Kozagawa | |||||
| Wakayama Prefectural Route 46 – Nachikatsuura | Entrance of Bypass road | |||||
| Wakayama Prefectural Route 46 – Nachikatsuura | ||||||
| Wakayama Prefectural Route 46 – Nachikatsuura | ||||||
| Wakayama Prefectural Route 45 – Nachikatsuura,Tanabe | ||||||
| Kushimoto | Wakayama Prefectural Route 38 – Kushimoto,Susami | |||||
| Wakayama Prefectural Route 41 – Kushimoto | ||||||
| Wakayama Prefectural Route 41 – Kushimoto | ||||||
 National Route 371 – Kushimoto, Kawachinagano | ||||||
| Wakayama Prefectural Route 39 – Kushimoto,Kozagawa | ||||||
| Susami | Wakayama Prefectural Route 36 – Susami,Kamitonda | |||||
| Wakayama Prefectural Route 38 – Kushimoto,Susami | ||||||
| Shirahama | Wakayama Prefectural Route 37 – Shirahama,Tanabe | |||||
| Wakayama Prefectural Route 34 – Shirahama | ||||||
| Kamitonda | Wakayama Prefectural Route 31 – Shirahama,Tanabe | |||||
| National Route 311 – Owase, Kamitonda | ||||||
| Tanabe | Wakayama Prefectural Route 33 – Tanabe Wakayama Prefectural Route 31 – Shirahama,Tanabe | To Nanki-Shirahama Airport | ||||
| Wakayama Prefectural Route 29 – Tanabe | ||||||
| Wakayama Prefectural Route 208 – Tanabe | ||||||
| Hanwa Expressway Kisei Expressway | Nanki Tanabe Interchange | |||||
 National Route 424 – Tanabe, Kinokawa | Overlapping section with National Route 424 | |||||
| Minabe | National Route 424 – Tanabe, Kinokawa | End of overlapping section with National Route 424 | ||||
| Inami | Wakayama Prefectural Route 28 – Inami | |||||
| Gobo | National Route 425 – Owase, Gobo | |||||
| Wakayama Prefectural Route 25 – Gobo,Hidakagawa | ||||||
| Wakayama Prefectural Route 26 – Gobo,Hidakagawa | ||||||
| Wakayama Prefectural Route 24 – Gobo,Hidakagawa | ||||||
| Hidaka | Wakayama Prefectural Route 27 – Hidaka,Inami | |||||
| Wakayama Prefectural Route 23 – Hidaka,Yuasa | ||||||
| Yura | Wakayama Prefectural Route 23 – Hidaka,Yuasa | |||||
| Wakayama Prefectural Route 23 – Hidaka,Yuasa | ||||||
| Hirogawa | Wakayama Prefectural Route 27 – Hidaka,Inami | |||||
| Hanwa Expressway | Hirokawa Interchange | |||||
| Yuasa | Wakayama Prefectural Route 23 – Hidaka,Yuasa | |||||
| Aridagawa | Hanwa Expressway | Arida Interchange | ||||
| Wakayama Prefectural Route 22 – Aridagawa | ||||||
| Arida | Wakayama Prefectural Route 20 – Arida,Yuasa | |||||
| Wakayama Prefectural Route 20 – Arida,Yuasa | ||||||
 National Route 480 – Arida, Izumiotsu | ||||||
| Kainan | Hanwa Expressway | Kainan Interchange | ||||
 National Route 370 – Kainan, Nara | ||||||
| Wakayama Prefectural Route 9 – Kainan,Iwade | ||||||
| Wakayama | Wakayama Prefectural Route 13 – Wakayama,Hashimoto | |||||
 National Route 26 – Wakayama, Osaka National Route 24 – Wakayama, Kyoto | ||||||
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
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