# MenkyoQuest — Question ch7_q018

Chapter: Ch. 7 Expressway
Section: 第２節 走行上の注意
Type: Multiple choice
Difficulty: hard

## Question
Which following distance is correct when the road surface is wet and tires are worn? (Compared to the following distance when the road surface is dry and tires are new)

## Options
A. About 1.5 times
B. About 2 times
C. About 3 times
D. About 4 times

## Correct answer
B. About 2 times

## Explanation
Rules of the Road Chapter 7, Section 2, 2(4) specifies, "When the road surface is wet and tires are worn, a following distance of about twice this amount may be necessary." About twice the following distance required on a dry road surface with new tires is needed.

## Driving school curriculum
Stage 2 – Topic 16: Driving on expressways

## Source passage (Rules of the Road)
2 速度 (4) また、路面が雨にぬれ、タイヤが減つている場合は、この約２倍程度の車間距離が必要となることがあります。

## Tags
高速道路, 車間距離, 悪天候, 雨天

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Source basis: National Police Agency's official Rules of the Road manual (Public Domain under Article 13 §2 of Japan's Copyright Act).
Copyright on AI-drafted explanations belongs to the MenkyoQuest team.