Road Signs: Recognition and Meaning
The road signs domain tests whether you can identify a sign from its shape and color and then state the action California law requires. Expect regulatory signs (white rectangles and red prohibitions), warning signs (yellow diamonds, pennants, and pentagons), and guide/service signs (green, blue, brown, orange).
Read shape and color first
- Octagon, red: STOP. Come to a complete stop at the limit line, crosswalk, or roadway entrance, then yield.
- Inverted triangle, red/white: YIELD. Slow or stop and give way to traffic and pedestrians.
- Yellow diamond: warning. It does not by itself change right-of-way; adjust speed and watch for the hazard.
- Yellow pennant: no-passing zone begins.
- Yellow pentagon: school zone or school crossing; slow down and obey the posted limit when children are present.
- Round yellow with an X and RR: railroad advance warning; a crossbuck marks the crossing itself.
- Rectangle: white/black is regulatory, green is guide, blue is motorist services, brown is recreation, orange is construction.
- Red circle with a slash: prohibition, such as no turn, no parking, or no pedestrians.
Regulatory signs demand action
Speed limit signs set the legal maximum, but California's basic speed law still requires a safe speed for conditions. Do Not Enter, Wrong Way, and one-way arrows control direction. Lane-use signs tell you whether a lane is a turn lane, bike lane, or bus-only lane. Parking signs control stopping, standing, and parking; read the entire sign, including days and times.
Worked example
You see a yellow diamond with a curve arrow and a 40 MPH plaque. The diamond warns of a curve ahead; 40 MPH is an advisory speed, not a guarantee. In rain or heavy traffic, slow below 40. If the road is posted 55, the plaque does not raise the legal limit; the basic speed law controls.
Traps that cost marks
Treating a yield sign as optional; stopping at a warning sign that does not require a stop; confusing a school pentagon with a regulatory stop; ignoring a No Turn on Red plaque; assuming an orange construction sign is only a suggestion. A crossbuck is not a stop sign by itself, but you must stop if a train is approaching or lights flash.