# 道路交通法 / Road Traffic Act — 第一条 (Supplementary Provisions, Article 1)

- 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: 第一条 (Supplementary Provisions, Article 1)（施行期日） — address `suppl-4291-52/art-1`
- Text in force since: 2026-07-21
- URL (the page that opens at this provision): https://japanlaw.org/en/road-traffic-act/suppl-4291-52/art-1
- Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/335AC0000000105/suppl-4291-52/art-1
- 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.

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### 第一条（施行期日） — Effective Date
<sup>caption: machine translation, not official</sup>
<sup>suppl-4291-52/art-1 · https://japanlaw.org/en/road-traffic-act/suppl-4291-52/art-1 · https://japanlaw.org/l/335AC0000000105/suppl-4291-52/art-1</sup>

**第一項**  この法律は、平成三十年四月一日から施行する。ただし、次の各号に掲げる規定は、当該各号に定める日から施行する。
<sup>suppl-4291-52/art-1/par-1 · https://japanlaw.org/en/road-traffic-act/suppl-4291-52/art-1/par-1 · https://japanlaw.org/l/335AC0000000105/suppl-4291-52/art-1/par-1</sup>
This Act comes into effect on April 1, 2018; provided, however, that the provisions set forth in the following items come into effect on the dates specified respectively in those items:
<sup>machine translation, not official</sup>

  **一**  第三条の規定並びに次条並びに附則第十五条、第十六条、第二十七条、第二十九条、第三十一条、第三十六条及び第四十七条から第四十九条までの規定　公布の日
  <sup>suppl-4291-52/art-1/par-1/item-1 · https://japanlaw.org/en/road-traffic-act/suppl-4291-52/art-1/par-1/item-1 · https://japanlaw.org/l/335AC0000000105/suppl-4291-52/art-1/par-1/item-1</sup>
  The provisions of Article 3, and the provisions of the following Article, and Articles 15, 16, 27, 29, 31, 36 and 47 through 49 of the Supplementary Provisions: the date of promulgation
  <sup>machine translation, not official</sup>

## Cited by

1 provision cites this one. No official source publishes this direction.

- 道路交通法 附則第四十八条第一項（罰則の適用に関する経過措置） — https://japanlaw.org/en/road-traffic-act/suppl-4291-52/art-48/par-1 · https://japanlaw.org/l/335AC0000000105/suppl-4291-52/art-48/par-1

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## 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
- claude-sonnet-5-5 — Machine translation, batch road-traffic-act-20261013T074321-018, translated 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