Rrfb beacons — Iowa Permit Test

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

The rules

A rectangular rapid flashing beacon is turned on by hand with a push button.

The beacon flashes only after a person asks to cross, so a flashing beacon means someone is there.

Rectangular Rapid Flashing Beacons are manually activated by a push button and are often located at intersections without traffic signals or at mid-block crosswalks.

Iowa Driver's License Manual, p.18

Rectangular rapid flashing beacons are often found at mid-block crosswalks and at intersections without traffic signals.

These spots have no full signal, so a walker needs some way to tell drivers to stop.

Rectangular Rapid Flashing Beacons are manually activated by a push button and are often located at intersections without traffic signals or at mid-block crosswalks.

Iowa Driver's License Manual, p.18

When a rectangular rapid flashing beacon is activated, its amber lights flash in a rapid pattern.

Knowing how the beacon looks helps you spot it early and stop in time for a walker.

When activated, amber lights flash in a rapid pattern.

Iowa Driver's License Manual, p.18

When a rectangular rapid flashing beacon is flashing, you must stop for anyone within the crosswalk and watch for anyone about to enter it.

Someone pushed the button to cross, and a car that rolls on can hit them in the crosswalk.

Motorists must stop for anyone within the crosswalk and be alert for anyone about to enter the crosswalk when the beacon is flashing.

Iowa Driver's License Manual, p.18

On the test

How is a rectangular rapid flashing beacon turned on?

By a push button pressed by hand. The beacon flashes only after a person asks to cross, so a flashing beacon means someone is there. Iowa Driver's License Manual, p.18: “Rectangular Rapid Flashing Beacons are manually activated by a push button and are often located at intersections without traffic signals or at mid-block crosswalks.”

How this works

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Where these come from

Every rule here is checked against Iowa Driver's License Manual, published by the Iowa Department of Transportation, and against the state code itself. Last checked 2026-10-04.