# 道路交通法 / Road Traffic Act — 第四十二条 (Article 42) - Law: 道路交通法 (Road Traffic Act), 昭和三十五年法律第百五号 - English title "Road Traffic Act": Ministry of Justice translation - Kind: Act — the distinction between 法律 (Act), 政令 (Cabinet Order), 省令 (Ministerial Order) and 条例 (local ordinance) decides who may issue it and what it may say. - Provision: 第四十二条 (Article 42)（徐行すべき場所） — address `art-42` - Text in force since: 2026-07-21 - URL (the page that opens at this provision): https://japanlaw.org/ja/road-traffic-act/art-42 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/335AC0000000105/art-42 - Every provision below carries its address and both URLs on the line under it. - Japanese text: e-Gov 法令検索, Digital Agency (デジタル庁). English: as marked on each line below. Only the Japanese as published by the government has legal effect; the text below is a copy of it. Every English rendering below is a translation and says which kind: the Ministry of Justice's translation, or this site's machine translation, whose model and date the Sources list names. They are never merged and never substituted for one another. --- ### 第四十二条（徐行すべき場所） — (Places Where Vehicles Must Be Driven at Reduced Speeds) caption: Ministry of Justice translation — Japanese Law Translation Database System art-42 · https://japanlaw.org/ja/road-traffic-act/art-42 · https://japanlaw.org/l/335AC0000000105/art-42 **第一項** 車両等は、道路標識等により徐行すべきことが指定されている道路の部分を通行する場合及び次に掲げるその他の場合においては、徐行しなければならない。 art-42/par-1 · https://japanlaw.org/ja/road-traffic-act/art-42/par-1 · https://japanlaw.org/l/335AC0000000105/art-42/par-1 The driver of a vehicle or streetcar must drive at a reduced speed when traveling on a part of a road where road signs or markings specify that such a vehicle or streetcar must be driven at a reduced speed, as well as in the following cases: Ministry of Justice translation — Japanese Law Translation Database System **一** 左右の見とおしがきかない交差点に入ろうとし、又は交差点内で左右の見とおしがきかない部分を通行しようとするとき（当該交差点において交通整理が行なわれている場合及び優先道路を通行している場合を除く。）。 art-42/par-1/item-1 · https://japanlaw.org/ja/road-traffic-act/art-42/par-1/item-1 · https://japanlaw.org/l/335AC0000000105/art-42/par-1/item-1 before entering an intersection with poor visibility on the right or left, or before proceeding through a part of an intersection with poor visibility on the right or left (unless traffic controls are in place at the intersection or unless the vehicle or streetcar is proceeding down a priority road); Ministry of Justice translation — Japanese Law Translation Database System **二** 道路のまがりかど附近、上り坂の頂上附近又は勾配の急な下り坂を通行するとき。 art-42/par-1/item-2 · https://japanlaw.org/ja/road-traffic-act/art-42/par-1/item-2 · https://japanlaw.org/l/335AC0000000105/art-42/par-1/item-2 when proceeding around a curve in the road, over the top of an incline, or on a steep downward slope. Ministry of Justice translation — Japanese Law Translation Database System ## Cited by 2 provisions cite this one. No official source publishes this direction. - 道路交通法 第百十条の二第四項（特定の交通の規制等の手続） — https://japanlaw.org/ja/road-traffic-act/art-110-2/par-4 · https://japanlaw.org/l/335AC0000000105/art-110-2/par-4 - 道路交通法 第百十九条第一項第五号 — https://japanlaw.org/ja/road-traffic-act/art-119/par-1/item-5 · https://japanlaw.org/l/335AC0000000105/art-119/par-1/item-5 --- ## Sources - e-Gov 法令検索, Digital Agency (デジタル庁) — 道路交通法 — the text in force from 2026-07-21 (https://laws.e-gov.go.jp/law/335AC0000000105/20260721_508AC0000000052), retrieved 2026-10-13 - Japanese Law Translation Database System, Ministry of Justice (法務省) — Road Traffic Act — Ministry of Justice translation (https://www.japaneselawtranslation.go.jp/en/laws/view/2962/tb), retrieved 2026-10-13 - This site's parser, version 190 — 道路交通法 — structure, counts, cross-references and defined terms, computed 2026-10-13