Ch. 6 · Hazardous Areas

Interior lights, including those in taxis, must not be turned on while driving.

[True / False · Medium]

Answer: ✕ False

Explanation

The Rules of the Road say interior lights (except in buses) should not be turned on while driving, but this is a recommendation — there is no legal obligation barring ordinary vehicles or taxis from turning on interior lights while driving. The mandatory wording "must not be turned on" is therefore incorrect. (Route buses, by contrast, are required to keep their interior lights on at night.)

Driving school curriculumStage 2 – Topic 7: Driving in adverse conditions

Hikari

I thought interior lights were totally banned while driving?

Misaki

That's false. It's recommended not to use them, but there's no legal ban for regular cars or taxis — the wording 'must not' makes it wrong.

Hikari

So it's more of a guideline than a hard rule?

Misaki

Right. It's best practice to keep them off for visibility, but it's not a legal violation if you turn them on.

Source: Ch. 6 Hazardous Areas · Section (第３節夜間) · 2 灯火(5) 室内灯は、バスのほかは、走行中につけないようにしましよう。

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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.