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Why do we have speed limits rather than a speed range?

Sarah Jenkins
Sarah Jenkins
Lead Content Curator · Feb 24, 2026 · Updated Apr 13, 2026

Because that's the top speed you can safely do, assuming ideal conditions (at least that's the premise). When it's raining, snowing, cold or dark, this changes it from being ideal conditions. It's not safe to drive at that speed any more.

99
Words

1 min
Read Time

#106
of 500 in General Knowledge

+46%
vs Category Avg

The Short Answer

Because that's the top speed you can safely do, assuming ideal conditions (at least that's the premise). When it's raining, snowing, cold or dark, this changes it from being ideal conditions. It's not safe to drive at that speed any more. Worse it is, the slower you need to go, especially if your visibility is impaired. Too much variation in the weather to set a "minimum speed". Not sure about you are, but here there is a 5% tolerance on our 100kph speed limit – 105 before they'll ping you. (which quite funnily is, in mph, equating to 63mph in a 60)

Analysis

Key Concepts: Speed, that's, ideal

This explanation focuses on speed, that's, ideal and spans 99 words across 7 sentences. At 46% above the average General Knowledge explanation (68 words), this is one of the more thorough answers in this category, reflecting the complexity of the underlying question.

What This Answer Covers

The explanation opens with: “Because that's the top speed you can safely do, assuming ideal conditions (at least that's the premise).” It then elaborates by presenting a contrasting perspective, ultimately building toward a complete picture across 7 connected points.

How This Compares in General Knowledge

Ranked #106 of 500 General Knowledge questions by answer depth (top 22%). This places it in the comprehensive tier — the top quarter of most thoroughly answered questions. Questions at this depth typically involve multi-faceted topics requiring nuanced explanation.

Frequently Asked Questions

Is there a simple explanation for why we have speed limits rather than a speed range?

Because that's the top speed you can safely do, assuming ideal conditions (at least that's the premise). When it's raining, snowing, cold or dark, this changes it from being ideal conditions. It's not safe to drive at that speed any more. Worse it…

How detailed is this explanation compared to similar General Knowledge questions?

This is one of the most thorough answer at 99 words, ranked #106 of 500 General Knowledge questions by depth. The key concepts covered are speed, that's, ideal.

What approach does this answer take to explain we have speed limits rather than a speed range?

The explanation uses root cause analysis and contrasting perspectives across 99 words. It is categorized under General Knowledge and addresses the question through 2 analytical lenses.