Ch. 4 · Pre-Drive Conduct

When entering or exiting a tunnel, brightness changes suddenly and visual acuity drops sharply for a moment, so you need to increase speed and pass through quickly.

[True / False · Medium]

Answer: ✕ False

Explanation

The text states: "When brightness changes suddenly, visual acuity drops sharply for a moment. Slow down when entering or exiting a tunnel." The question's phrase "increase speed" is incorrect; the correct action is to "slow down."

Driving school curriculumStage 2 – Topic 5: Human capability and driving

Hikari
Hikari
Makes sense to speed up and get through the tunnel quickly when your vision drops, right?
Misaki
Misaki
That's false. When brightness changes suddenly, your visual acuity drops for a moment — so you need to slow down, not speed up.
Hikari
Hikari
Oh, so rushing through actually makes it more dangerous?
Misaki
Misaki
Exactly. Give your eyes time to adjust — slowing down keeps you safe during that brief blind moment.

Source: Ch. 4 Pre-Drive Conduct · Section (第５節 安全運転に必要な知識など) · １ 視覚の特性 (３) - 明るさが急に変わると、視力は、一時急激に低下します。トンネルに入る前やトンネルから出るときは速度を落としましよう。

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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.