Fog and smoke — Tennessee Permit Test

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

The rules

The best advice for driving in fog or smoke is not to drive at all; consider postponing your trip until the fog clears.

In thick fog a stopped car can appear only a few feet away. No skill makes up for not being able to see.

The best advice for driving in fog or smoke is "DON'T".

Tennessee Comprehensive Driver License Manual, p.75

In fog or smoke, drive with your lights on low beam and never with just your parking lights or fog lights on.

Parking lights and fog lights alone are too dim for other drivers to see you through the fog until it is too late.

Never drive with just your parking or fog lights on.

Tennessee Comprehensive Driver License Manual, p.75

If you cannot see the road's edge in fog, pull off as far to the right as possible, well out of the traffic lane, and turn on your emergency flashers.

A car stopped in the lane in fog will be hit from behind. Get fully off the road and let your flashers mark where you are.

However, if you can’t see the road’s edge, pull off as far to the right as possible – well out of the traffic lane – and turn on your emergency flashers.

Tennessee Comprehensive Driver License Manual, p.75

If your car stalls or is disabled in fog, move away from the vehicle to avoid personal injury.

A driver who cannot see your stalled car may hit it. You are safer standing well away than sitting inside.

If your car stalls or is disabled, move away from the vehicle to avoid personal injury.

Tennessee Comprehensive Driver License Manual, p.75

On the test

What is the best advice for driving in fog or smoke?

Do not drive in it. In thick fog a stopped car can appear only a few feet away. No skill makes up for not being able to see. Tennessee Comprehensive Driver License Manual, p.75: “The best advice for driving in fog or smoke is "DON'T".”

How this works

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

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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.

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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.