Interstate hypnosis — Tennessee Permit Test

Interstate hypnosis on the Tennessee permit test — 6 rules, each with the reason behind it and a question on it while it is fresh.

The rules

Interstate hypnosis is drowsiness or unawareness brought on by reduced activity and the steady sounds of wind, engine and tire hum.

The hum lulls you into staring ahead half-asleep, and you stop noticing what traffic is doing.

This is known as interstate hypnosis.

Tennessee Comprehensive Driver License Manual, p.71

To fight interstate hypnosis, keep shifting your eyes left and right and check your mirrors instead of staring ahead.

Staring straight ahead can almost put you to sleep. Moving your eyes keeps your brain awake.

Get into the habit of shifting your eyes left and right and checking your rear view mirror.

Tennessee Comprehensive Driver License Manual, p.71

Quit driving when you are drowsy; drowsiness is the first step in falling asleep.

Fighting sleep at the wheel rarely works. A nod-off at speed can put you off the road.

Drowsiness is the first step in falling asleep.

Tennessee Comprehensive Driver License Manual, p.71

On long trips, take a break and get out of the car at least every 2 hours, or every 100 miles or so.

Even if you feel fine, hours of sitting dull your attention. A short walk wakes you up.

Take a break and get out of the car at least every two hours, or every 100 miles or so.

Tennessee Comprehensive Driver License Manual, p.71

It is safest for you and others if you do not drive more than 8 hours per day.

After a full day at the wheel, tired drivers react slowly and make mistakes they would not make fresh.

It is safest for you and others if you do not drive more than eight hours per day.

Tennessee Comprehensive Driver License Manual, p.71

Keep your car's interior as cool as possible to fight interstate hypnosis.

A warm, stuffy car makes you sleepy. Cool air helps keep you alert.

Keep your car’s interior as cool as possible.

Tennessee Comprehensive Driver License Manual, p.71

On the test

What is interstate hypnosis?

Drowsiness from steady, dull driving. The hum lulls you into staring ahead half-asleep, and you stop noticing what traffic is doing. Tennessee Comprehensive Driver License Manual, p.71: “This is known as interstate hypnosis.”

How this works

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Where these come from

Every rule here is checked against Tennessee Comprehensive Driver License Manual, published by the Tennessee Department of Safety and Homeland Security, and against the state code itself. Last checked 2026-10-03.