Driver's License Test Prep
California Practice Traffic Lights

What must you do at a flashing yellow traffic light?

  1. A.
    Come to a full stop and then continue.
  2. B.
    Wait until the light turns solid green.
  3. C.
    Slow down and stay alert as you proceed. Correct
The Why

The answer is "Slow down and stay alert as you proceed."

A flashing yellow traffic light warns you to proceed with caution; slow down and stay alert, but you do not need to stop. The 'come to a full stop' choice borrows the flashing-red rule listed directly above it in the manual, which is where drivers who see two flashing signals as interchangeable land.

Why the others miss

The traps in the wrong answers

A. Come to a full stop and then continue.

Applies the flashing-red rule of full stop to a flashing yellow, which the manual says does not require stopping. This answer reads any flashing signal as requiring a stop, borrowing the flashing-red instruction because both signals flash.

B. Wait until the light turns solid green.

Reads a flashing yellow as a transitional signal that will soon become a solid green. This answer assumes any flashing pattern is a placeholder waiting to turn steady, so holds until the signal locks in.

The Rule

This question tests your knowledge of Traffic Lights in California. Source: California Driver Manual, "Traffic Signals: Flashing Yellow Light," p.33..

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