Ch. 5 · Driving Method

Regarding following distance for large vehicles, medium-sized vehicles, and semi-medium-sized vehicles, which of the following is correct?

[Multiple choice · Hard]

Answer: B: Because the driver's seat is positioned high with a downward viewing angle, the following distance feels longer than it actually is, so it tends to become shorter

Explanation

Chapter 5, Section 4, 2(4) of the Rules of the Road states that large vehicles, medium-sized vehicles, and semi-medium-sized vehicles have driver's seats positioned higher than ordinary vehicles, creating a downward viewing angle that makes the following distance feel longer than it actually is, so caution is needed as the following distance tends to become shorter.

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

Hikari
Hikari
Sitting high up should make distances feel shorter, shouldn't it?
Misaki
Misaki
It's the opposite. The downward angle makes the distance *feel* longer than it really is, so drivers unconsciously follow too close.
Hikari
Hikari
So the real gap shrinks even though it looks fine to them?
Misaki
Misaki
Exactly. That's why large-vehicle drivers must stay extra aware of their actual following distance.

Source: Ch. 5 Driving Method · Section (第4節 安全な速度と車間距離) · 2(4) 特に、大型自動車、中型自動車及び準中型自動車は、普通自動車に比べ、運転席の位置が高く、見下ろす形になり、車間距離が実際より長く感じられるため、車間距離が短くなりやすいので注意しましよう。

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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.