Ch. 5 · Driving Method

The stopping distance on wet road surfaces with worn tires can extend to approximately three times that on dry road surfaces with tires in good condition.

[True / False · Hard]

Answer: ✕ False

Explanation

The Rules of the Road state that stopping distance on wet road surfaces with worn tires can extend to approximately twice that on dry road surfaces with tires in good condition. Since it is twice, not three times, this statement is incorrect.

Driving school curriculumStage 1 – Topic 7: Safe speed and following distance

Hikari

Three times longer? Wow, that sounds about right for worn tires on wet roads!

Misaki

Actually, that's false. The stopping distance extends to approximately twice that on dry roads with good tires, not three times.

Hikari

Oh, so they exaggerated the number to trick me?

Misaki

Exactly. Twice is already serious enough — always watch for inflated figures in these questions.

Source: Ch. 5 Driving Method · Section (第４節安全な速度と車間距離) · 2(3) 路面が雨にぬれ、タイヤがすり減つている場合の停止距離は、乾燥した路面でタイヤの状態が良い場合に比べて２倍程度に延びることがあります。

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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.