Ch. 1 · Common Conduct

When the boundary line of a traffic lane is marked with a solid yellow line, lane changes are prohibited in all situations.

[True / False · Medium]

Answer: ✕ False

Explanation

When the boundary line of a traffic lane is marked with a solid yellow line, lane changes are prohibited in principle, but there are exceptions such as yielding to emergency vehicles or making unavoidable lane changes to turn right or left. The Rules of the Road clarify that this is not an absolute prohibition "in all situations."

Driving school curriculumStage 1 – Topic 2: Following traffic signals

Hikari

Solid yellow lane line means no lane changes ever, right?

Yui

Actually, that's false. There are exceptions—like making way for an ambulance or changing lanes to turn. It's not absolute.

Hikari

So the 'in all situations' part is the trap?

Yui

Exactly! When you see 'all' or 'never,' double-check for exceptions.

Source: Ch. 1 Common Conduct · Section (第２節信号) · Rules of the Road, Ch.1 §2 / 3(2) Regulatory markings prohibit or designate specific traffic behaviors — examples include no-parking markings and bus-lane-only markings. Types and meanings are listed in Appendix 3(2).

🤖 Dig deeper with AI

Send this question's context to ChatGPT for a richer explanation. The prompt also asks the AI to point you back to this chapter's practice quiz.

🚀 Ask ChatGPT

If the button doesn't open ChatGPT, tap Copy and paste it into Claude, Gemini, or any other LLM you prefer. On a free plan, Claude (claude.ai) tends to produce more accurate explanations that respect this site's content.

← Back to all Ch. 1 questions

See the glossary for definitions of key terms.

Source content excerpted from the NPA “Rules of the Road” instructional manual, in the public domain under Japanese Copyright Act Article 13(2). Explanations are AI-assisted and copyrighted by the MenkyoQuest editorial team.