Oklahoma: Sign shapes and colors Practice Test
What the shape and color of a sign tell you: stop, yield, regulatory, warning, school, construction, guide and service signs.
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Questions are original and based on the official manual "Oklahoma Driver Manual" (2025 (updated November 24, 2025)), Service Oklahoma.
All 16 questions in this practice test
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A stop sign is damaged or partly covered by dirt or snow. How can you still tell that you must stop?
- By its octagonal shape and red color
- By the white border around its edge
- By the yellow light mounted above it
- By the stop line always painted before it
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Correct answer: By its octagonal shape and red color
Sign shapes and colors carry meaning on their own, so the eight-sided red shape tells you to stop even when the word cannot be read.
Source: Oklahoma Driver Manual (2025 (updated November 24, 2025)), page 19 · Open this page in the manual (Manual page 19)
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In the manual's chart of sign colors, what does red stand for?
- General warning
- Driver guidance
- Recreation and culture
- Stop or "Not Allowed"
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Correct answer: Stop or "Not Allowed"
Red is the color for stopping or for something that is not allowed.
Source: Oklahoma Driver Manual (2025 (updated November 24, 2025)), page 19 · Open this page in the manual (Manual page 19)
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In the manual's chart of sign colors, what do white and black signs give you?
- Warnings about construction
- Regulations and instructions
- Directions to recreation sites
- Warnings of general hazards
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Correct answer: Regulations and instructions
White and black is the color pair for regulations and instructions, the rules you must follow.
Source: Oklahoma Driver Manual (2025 (updated November 24, 2025)), page 19 · Open this page in the manual (Manual page 19)
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In the manual's chart of sign colors, what does green stand for?
- General warning
- Stop or "Not Allowed"
- Construction warning
- Guide
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Correct answer: Guide
Green is the color for guide signs, such as the large overhead interstate signs.
Source: Oklahoma Driver Manual (2025 (updated November 24, 2025)), page 19 · Open this page in the manual (Manual page 19)
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In the manual's chart of sign colors, what does yellow stand for?
- General warning
- Driver guidance
- Stop or "Not Allowed"
- Recreation and culture
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Correct answer: General warning
Yellow is the color for general warnings about conditions ahead.
Source: Oklahoma Driver Manual (2025 (updated November 24, 2025)), page 19 · Open this page in the manual (Manual page 19)
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Which color does the manual's chart give to signs for driver guidance?
- Orange
- Red
- Blue
- Yellow
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Correct answer: Blue
Blue is the color for driver guidance signs.
Source: Oklahoma Driver Manual (2025 (updated November 24, 2025)), page 19 · Open this page in the manual (Manual page 19)
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What does the manual's color chart say fluorescent yellow-green signs are used for?
- Construction and road maintenance
- Recreation and historic sites
- Schools, pedestrians and bicycling
- Directions to a library or hospital
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Correct answer: Schools, pedestrians and bicycling
Fluorescent yellow-green is the high-emphasis color for signs about schools, pedestrians and bicycling.
Source: Oklahoma Driver Manual (2025 (updated November 24, 2025)), page 19 · Open this page in the manual (Manual page 19)
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In the manual's chart of sign colors, what does brown stand for?
- Recreation, cultural and historical
- Construction and maintenance warning
- Stop or "Not Allowed"
- High emphasis for school zones
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Correct answer: Recreation, cultural and historical
Brown signs point to recreational, cultural and historical places.
Source: Oklahoma Driver Manual (2025 (updated November 24, 2025)), page 19 · Open this page in the manual (Manual page 19)
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What shape and colors does the manual give for a yield sign?
- Red and white octagon
- Red and white triangle
- Yellow and black diamond
- Yellow and black circle
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Correct answer: Red and white triangle
A yield sign is a red and white triangle.
Source: Oklahoma Driver Manual (2025 (updated November 24, 2025)), page 19 · Open this page in the manual (Manual page 19)
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On a sign, what does a red circle with a line through it mean?
- "Do not" or "Not allowed"
- "Proceed with caution"
- "Hazard ahead"
- "Allowed at certain times"
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Correct answer: "Do not" or "Not allowed"
A red circle crossed by a line means the action shown is not allowed.
Source: Oklahoma Driver Manual (2025 (updated November 24, 2025)), page 19 · Open this page in the manual (Manual page 19)
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How does the manual describe warning signs?
- Octagon, white letters on red
- Diamond, black letters on yellow
- Triangle, red letters on white
- Diamond, white letters on blue
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Correct answer: Diamond, black letters on yellow
Warning signs are diamond-shaped, with black letters on a yellow background.
Source: Oklahoma Driver Manual (2025 (updated November 24, 2025)), page 21 · Open this page in the manual (Manual page 21)
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What shape and colors does the manual give for the railroad advance warning sign?
- Round, yellow and black
- Diamond, orange and black
- Octagon, red and white
- Triangle, red and white
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Correct answer: Round, yellow and black
The railroad advance warning sign is a round yellow and black sign that tells you railroad tracks are ahead.
Source: Oklahoma Driver Manual (2025 (updated November 24, 2025)), page 22 · Open this page in the manual (Manual page 22)
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What colors does the manual give for railroad crossbuck signs?
- Yellow and black
- Red and white
- Black and white
- Orange and black
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Correct answer: Black and white
Railroad crossbucks are black and white; the round advance warning sign is the yellow and black one.
Source: Oklahoma Driver Manual (2025 (updated November 24, 2025)), page 22 · Open this page in the manual (Manual page 22)
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What shape are most construction and maintenance signs?
- Octagon
- Triangle
- Diamond
- Circle
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Correct answer: Diamond
Most orange work zone signs are diamond-shaped.
Source: Oklahoma Driver Manual (2025 (updated November 24, 2025)), page 23 · Open this page in the manual (Manual page 23)
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Which set of colors do guide signs use?
- Green, white or brown
- Red, yellow or orange
- Yellow, black or orange
- Yellow, orange or fluorescent yellow-green
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Correct answer: Green, white or brown
Guide signs are green, white or brown.
Source: Oklahoma Driver Manual (2025 (updated November 24, 2025)), page 25 · Open this page in the manual (Manual page 25)
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What color are service signs?
- Blue
- Green
- Orange
- Red
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Correct answer: Blue
The manual describes service signs as blue.
Source: Oklahoma Driver Manual (2025 (updated November 24, 2025)), page 25 · Open this page in the manual (Manual page 25)