Ch. 7 · Expressway

When the road surface is dry and the tires are new, you need to maintain a following distance of about 50 meters when traveling at 100 km/h.

[True / False · Medium]

Hikari

Fifty meters sounds like plenty of space when the road's dry and my tires are brand new.

Yui

That's actually false — even in perfect conditions at 100 km/h, you need about 100 meters, not 50.

Hikari

Whoa, double what I thought!

Yui

Yep! High speeds need way more distance than you'd expect. Don't let good conditions fool you.

Source: Ch. 7 Expressway · Section (第2節 2 速度 (4)) · Rules of the Road, Ch.7 §2 (Driving on expressways) — Enter the main lane at sufficient speed after using the acceleration lane and signalling. Maintain the posted minimum speed and lane discipline. Do not stop or park on the main lane or shoulder except in emergencies; use hazard lights and emergency phones.

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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.