Road signs and signals make up roughly a quarter of the 46-question California DMV written test. Knowing the regulatory, warning, and guide signs by sight is one of the fastest ways to raise your score.

Regulatory signs (what you must or must not do, like stop and speed limits), warning signs (yellow diamonds alerting you to hazards ahead), and guide signs (directions, distances, and services).

Yes. This test is 100% free, uses real sign images, and gives you the correct answer and a short explanation for every sign — retake it as many times as you like.

No. Focus on what each sign means and what action it requires. The DMV cares that you respond correctly to the sign, not that you recite its exact text.