California Road Signs Study Guide
Road signs communicate rules, warnings, and guidance using a system of standardized shapes and colors. Knowing what each sign means — and being able to recognize it instantly — is a core part of the California DMV knowledge test.
Sign Shapes & What They Mean
Octagon (stop), triangle pointing down (yield), circle (railroad crossing warning), pennant (no passing zone), diamond (warning), rectangle (regulatory or guide), pentagon (school zone or crossing). Shape alone can tell you what a sign means even if you can't read it.
Sign Colors
Red means prohibition (stop, yield, do not enter, wrong way). Yellow is a general warning. Orange is used in construction and work zones. Green provides guidance and distance information. Blue indicates motorist services (hospitals, rest areas, gas). Brown marks recreational and cultural areas. White is used for regulatory information.
Key Regulatory Signs
The STOP sign requires a complete stop at the marked line before proceeding. A YIELD sign means slow down, prepare to stop, and give right of way to cross traffic. DO NOT ENTER and WRONG WAY signs indicate you are about to go the wrong direction on a one-way road or freeway ramp.
Key Rules at a Glance
- Octagon shape: Always means STOP
- Downward-pointing triangle: Always means YIELD
- Orange signs: Construction and work zones
- Red signs: Prohibition — stop, do not enter, wrong way
- Pentagon shape: School zone or pedestrian crossing ahead