Signaling — Missouri Permit Test

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

The rules

You should signal at least 100 feet before you turn so other drivers can be ready.

A signal given as you turn tells nobody anything. A hundred feet is what makes it a warning instead of an announcement.

You should signal at least 100 feet before you turn so the other drivers can be ready.

Missouri Driver Guide, p.24

You can signal with your hand and arm or with your vehicle's turn signals and brake lights.

An arm out of the window still works, which matters on the day a bulb has gone.

You can signal with your hand and arm or with your vehicle’s turn signals and brake lights.

Missouri Driver Guide, p.24

Check your vehicle's turn signals often to make sure they are working properly.

A dead bulb does not announce itself from the driver's seat. Checking is the only way you find out before somebody else does.

Check your vehicle’s turn signals often to ensure they are working properly.

Missouri Driver Guide, p.24

After a turn or lane change, make sure your turn signal has switched off, because after small turns it may not cancel by itself.

A signal left blinking tells the driver behind you that another turn is coming. They will act on it.

After small turns, the signal may not turn off by itself.

Missouri Driver Guide, p.59

On the test

How far before a turn should you signal in Missouri?

At least 100 feet. A signal given as you turn tells nobody anything. A hundred feet is what makes it a warning instead of an announcement. Missouri Driver Guide, p.24: “You should signal at least 100 feet before you turn so the other drivers can be ready.”

How this works

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Where these come from

Every rule here is checked against Missouri Driver Guide, published by the Missouri Department of Revenue, and against the state code itself. Last checked 2026-09-16.