Preface. Roadway signs in the United States increasingly use symbols rather than words to convey their message. Symbols provide instant communication with roadway users, overcome language barriers, and are becoming standard for traffic control devices throughout the world.
For example, the DO NOT ENTER sign means do not enter a road or off ramp where the sign is posted (usually on a freeway off ramp). The WRONG WAY sign may or may not be posted with the DO NOT ENTER sign. If you see one or both of these signs, drive to the side of the road and stop. You are going against traffic.
This California road signs practice test is structured very similarly to the regular DMV road sign test you might have taken already. Twenty multiple choice questions, three or four answers for every question and only one of those answers being correct.
In the United States, road signs are, for the most part, standardized by federal regulations, most notably in the Manual on Uniform Traffic Control Devices (MUTCD) and its companion volume the Standard Highway Signs (SHS). There are no plans for adopting the Vienna Convention on Road Signs and Signals standards.