Sign Shapes, Colors, and Symbols
Sign Shapes, Colors, and Symbols is the recognition domain. Montana's test uses it to see whether you can identify a sign's meaning from its shape and color even before you read the words. Shape and color are deliberate: each combination carries a standard meaning.
Core rules
- Octagon: STOP. It is the only octagonal sign, so a faded or snow-covered stop sign is still a stop sign.
- Inverted triangle: YIELD. Slow down and give way; stop only if needed.
- Diamond: warning. Yellow diamonds warn of conditions ahead.
- Pennant: no-passing zone. The yellow pennant marks the start of a no-passing zone, not a yield.
- Vertical rectangle: regulatory. White rectangles with black text give orders such as speed limits, lane use, and parking rules.
- Horizontal rectangle: guide. Green, blue, and brown rectangles give directions and services.
- Circle: railroad advance warning. A yellow circle with a black X and RR warns of tracks ahead.
- Crossbuck: the white X-shaped sign at the crossing means yield to trains.
- Pentagon: school zone or school crossing. It is usually fluorescent yellow-green.
- Red means stop, yield, or prohibition. Yellow means warning. Orange means work zone. Green means guide. Blue means services. Brown means recreation. White means regulation.
Worked example
A sign is a yellow circle with a black X and the letters RR. Reasoning: the circle is the railroad advance-warning shape, and the X/RR symbol confirms tracks ahead. Slow down, look and listen, and be ready to stop. Do not confuse it with the crossbuck at the tracks, which marks the crossing itself. If lights flash or a gate lowers, stop and wait.
Traps
Do not confuse the yellow pennant with the yield triangle; the pennant means no passing. Do not treat every yellow sign as a warning if it is a plaque with an advisory speed. Do not rely on color alone when snow or dirt obscures it; use shape. Do not assume a crossbuck means you may cross without looking.