A vehicle must not change its course without good reason.

Explanation

Article 26-2(1) states that a vehicle must not change its course carelessly or without reason. Needless lane or course changes are prohibited.

Guides that explain this

• Stopping Distance in Japan: Reaction Distance + Braking Distance
• Overtaking and Lane Rules in Japan: Where It Is Banned, and How

Related terms

• Vehicle (sharyō)

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