Large vehicle risky situations — Tennessee Permit Test

Large vehicle risky situations on the Tennessee permit test — 4 rules, each with the reason behind it and a question on it while it is fresh.

The rules

Near a commercial vehicle weigh station, avoid driving in the right lane so slow trucks can merge back onto the roadway.

Trucks leaving a weigh station start slowly and need the right lane to get up to speed. A car there blocks their way back in.

When you are near a Commercial Vehicle Weigh Station, avoid driving in the right lane so slow-moving trucks can easily merge back onto the roadway.

Tennessee Comprehensive Driver License Manual, p.109

Runaway truck ramps are for stopping out-of-control trucks and buses; vehicles should never stop or park in them.

A truck with no brakes is heading for that ramp at high speed. A car parked on it will be hit with nowhere for the truck to go.

These ramps are designed to stop out-of-control trucks or buses going down step downgrades. Vehicles should never stop or park in these areas.

Tennessee Comprehensive Driver License Manual, p.110

On hills, smoking wheels or high speed on a truck or bus can be a sign of brake loss; fall back and do not pass.

A truck losing its brakes may swerve or speed up without warning. Being beside or in front of it puts you in its path.

Smoking wheels or a high speed can be a sign of brake loss.

Tennessee Comprehensive Driver License Manual, p.110

Never try to cross behind a truck that is preparing to back up; wait patiently for the driver to finish.

A truck backing into a dock cannot see what is behind it. A car slipping through there is in the driver's blind spot.

Never try to cross behind a truck when it is preparing to back up.

Tennessee Comprehensive Driver License Manual, p.110

On the test

Near a commercial vehicle weigh station, which lane should you avoid?

The right lane. Trucks leaving a weigh station start slowly and need the right lane to get up to speed. A car there blocks their way back in. Tennessee Comprehensive Driver License Manual, p.109: “When you are near a Commercial Vehicle Weigh Station, avoid driving in the right lane so slow-moving trucks can easily merge back onto the roadway.”

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.

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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.