Slow moving vehicles — Tennessee Permit Test

Slow moving vehicles on the Tennessee permit test — 4 rules, each with the reason behind it and a question on it while it is fresh.

The rules

It is against the law to drive slower than the posted minimum speed under normal driving conditions.

Cars coming up fast behind a slow car have to brake hard or swerve. That is how rear-end crashes start.

It is against the law to drive slower than the posted minimum speed under normal driving conditions.

Tennessee Comprehensive Driver License Manual, p.46

Even where no minimum speed is posted, it is against the law to drive so slowly that you block traffic.

A crawling car makes a long line form behind it. Impatient drivers then try risky passes to get around.

If there is no posted minimum speed, it is still against the law to drive so slowly that you block traffic.

Tennessee Comprehensive Driver License Manual, p.46

You are driving a slow-moving vehicle if your speed is 10 mph or more below the lawful maximum speed.

Faster cars close the gap on you quickly. Knowing when you count as slow tells you when to watch your mirror and let them by.

NOTE: You are considered to be driving a slow-moving vehicle if you are traveling at a rate of speed that is 10 miles per hour or more below the lawful maximum speed.

Tennessee Comprehensive Driver License Manual, p.46

If 5 or more vehicles are lined up behind your slow vehicle, turn or pull off the road as soon as you safely can.

A long line behind a slow car breeds risky passing. Pulling off lets the line go by safely.

If five or more vehicles are lined up behind you, turn or pull off the roadway as soon as you can do so safely.

Tennessee Comprehensive Driver License Manual, p.46

On the test

When is it illegal to drive slower than the posted minimum speed?

Under normal driving conditions. Cars coming up fast behind a slow car have to brake hard or swerve. That is how rear-end crashes start. Tennessee Comprehensive Driver License Manual, p.46: “It is against the law to drive slower than the posted minimum speed under normal driving conditions.”

How this works

Most practice tests hand you a bank of questions and leave the manual somewhere else. This one puts them together.

You read one law and the reason behind it, then answer a question on that law while it is still fresh. Get it right and you move on; get it wrong and you have found the gap while it is cheap to fix, not on the morning of the exam.

Learning one rule at a time, and proving it immediately, is what turns a manual you skimmed into something you actually know — and it makes studying feel like getting somewhere rather than like waiting to find out.

What it costs

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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.