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Why is it that when I watch American police shows, they always get people to perform sobriety tests like ‘walking the line.’ In Australia we use a breathalyser, surely this is easier?

Dr. Aris Thorne
Dr. Aris Thorne
Senior Science Editor · Jan 7, 2026 · Updated Apr 13, 2026

Typically, a cop in the US will do both for several reasons. 1) Breathalyzer results aren't always permissible in court 2) Some people become incapable of driving at less than the .08 BAC threshold. Using a field sobriety test to prove that they aren't capable of driving allows the cop to stop th…

76
Words

1 min
Read Time

#205
of 500 in History

+6%
vs Category Avg

The Short Answer

Typically, a cop in the US will do both for several reasons. 1) Breathalyzer results aren't always permissible in court 2) Some people become incapable of driving at less than the .08 BAC threshold. Using a field sobriety test to prove that they aren't capable of driving allows the cop to stop them from driving home. 3) Breathalyzers don't catch anything but alcohol, so if the driver is high on something else, a Field sobriety test will catch it theoretically.

Analysis

Key Concepts: Driving, aren't, field

This explanation focuses on driving, aren't, field and spans 76 words across 4 sentences. The depth is typical for History questions (category average: 72 words), striking a balance between accessibility and completeness.

What This Answer Covers

The explanation opens with: “Typically, a cop in the US will do both for several reasons.” It then elaborates by presenting a contrasting perspective, ultimately building toward a complete picture across 4 connected points.

How This Compares in History

Ranked #205 of 500 History questions by answer depth (top 42%). This falls in the detailed tier — above average depth. The explanation goes beyond surface-level but keeps things accessible.

Frequently Asked Questions

Is there a simple explanation for why it that when i watch american police shows, they always get people to perform sobriety tests like 'walking the line.' in australia we use a breathalyser, surely this is easier?

Typically, a cop in the US will do both for several reasons. 1) Breathalyzer results aren't always permissible in court 2) Some people become incapable of driving at less than the .08 BAC threshold. Using a field sobriety test to prove that they…

How detailed is this explanation compared to similar History questions?

This is an above-average answer at 76 words, ranked #205 of 500 History questions by depth. The key concepts covered are driving, aren't, field.

What approach does this answer take to explain it that when i watch american police shows, they always get ?

The explanation uses root cause analysis and contrasting perspectives across 76 words. It is categorized under History and addresses the question through 2 analytical lenses.