Basic speed rule — Tennessee Permit Test

Basic speed rule 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 Basic Speed Rule does not set an exact speed limit; it teaches that the speed you may drive is limited by current conditions.

A 65 mph limit is set for a dry road in daylight. On a dark two-lane road in rain, that speed leaves no time to stop.

The BSR does not set an exact speed limit; instead, it teaches that the speed you may drive is limited by current conditions.

Tennessee Comprehensive Driver License Manual, p.46

Your speed must be adjusted to conditions so you can stop within the clear distance ahead.

Around a blind curve a stalled car may be waiting. If you cannot stop in the road you can see, you will hit it.

Your speed must be adjusted to conditions so you can stop within a clear distance ahead.

Tennessee Comprehensive Driver License Manual, p.46

If you drive at a speed that is unsafe for conditions, you are violating the basic rule, even if you are under the posted limit.

A speed limit sign cannot see the fog or ice. Being under the limit does not help if the car cannot stop in time.

If you drive at a speed that is unsafe for existing conditions in any area, you are violating the basic rule.

Tennessee Comprehensive Driver License Manual, p.46

If the car ahead stops suddenly and you cannot avoid hitting it from behind, you are either breaking the Basic Speed Rule or following too closely, even if you were within the speed limit.

Cars ahead stop suddenly all the time in town. Your speed and gap have to leave room for that, every time.

If you cannot stop in time to avoid hitting that car from behind, you are either breaking the BSR - even if you were driving within the posted speed limit - or you are following too closely.

Tennessee Comprehensive Driver License Manual, p.47

On the test

Under the Basic Speed Rule, what limits the speed you may drive?

The conditions you are driving in. A 65 mph limit is set for a dry road in daylight. On a dark two-lane road in rain, that speed leaves no time to stop. Tennessee Comprehensive Driver License Manual, p.46: “The BSR does not set an exact speed limit; instead, it teaches that the speed you may drive is limited by current conditions.”

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.