Oklahoma Road Signs Practice Test
Sharpen the skill the Written Knowledge Test (also called the Oklahoma Written Exam) leans on most: 25 questions on road sign shapes, colors, and meanings, each explained in plain English. The real SOK Written Knowledge Test (also called the Oklahoma Written Exam) has 20 questions, and you need 15 correct (75%) to pass.
Tap an answer. The explanation opens so you can learn it, then go on. Keyboard: A–D or 1–4 to answer, then Enter or Space.
Question 1 of 25
1. Along a curb you see a white sign with a large letter P inside a red circle and slash. What does it tell you?
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Correct answer: C. A P covered by a red circle and slash is the international no-parking symbol, banning parking where the sign applies. It keeps curbs clear for visibility, hydrants, and traffic flow. Any symbol wearing the red slash is something you cannot do.
2. On a dark road you see several black-and-yellow signs, each with a single sideways V pointing to the right, spaced along the roadside. What do they mark?
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Correct answer: B. Chevron alignment signs outline a sharp curve, each arrowhead pointing the direction the road bends. They are placed in a series so your headlights pick up the curve's shape at night. Follow the chevrons like breadcrumbs through the turn.
3. A white sign with a green arrow and the word ONLY is mounted beside a traffic signal. When may you move in that direction?
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Correct answer: B. A signal-mounted green arrow with ONLY ties that movement to the arrow indication. Go that way when the arrow is on and the path is clear; otherwise wait. Arrows assign time as well as direction.
4. You are low on fuel on a long highway drive. Signs of which color point you to services such as gas, food, lodging, and hospitals?
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Correct answer: B. Blue signs mark motorist services, including fuel, food, lodging, rest areas, and hospitals. They let travelers plan a stop before leaving the highway. When your body or your car needs something, look for blue.
5. You stop at a red light planning to turn right, and a white sign beside the signal reads NO TURN ON RED. What does the sign change?
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Correct answer: A. Many places allow a right turn on red after a complete stop, but a NO TURN ON RED sign removes that option. It appears where crosswalks or sight lines make red-light turns risky. When posted, red simply means wait.
6. You see a white square sign showing a curved U-shaped arrow inside a red circle with a slash through it. What is prohibited?
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Correct answer: B. The slashed U-arrow bans U-turns at that location, usually because oncoming drivers cannot see you turn around in time. Continue to a spot where reversing direction is legal and safe. Red circle plus slash means the pictured move is forbidden.
7. A yellow diamond sign shows a small red stop sign symbol with an upward arrow. What should you do when you see it?
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Correct answer: C. A stop-ahead warning is used where the actual stop sign is hidden by a curve, hill, or trees. Start braking as soon as you see it, since the real stop will appear with little warning.
8. On a highway, you look for the way to your destination city. What kind of information do signs with a green background give you?
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Correct answer: D. Green guide signs point the way, listing destinations, how many miles remain, and which exits to take. They inform rather than command, so no action is required. Think of green as the color that says go this way.
9. You pass a round yellow sign marked with a large black X and the letters R R. What is it telling you?
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Correct answer: A. The round yellow RXR sign is the advance warning for a railroad crossing, posted well before the tracks. It gives you time to slow, quiet distractions, and scan for trains. Round and yellow means railroad ahead, not at, the sign.
10. You approach a red circle with a slash over a U-turn arrow. What is prohibited?
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Correct answer: B. The slashed U-turn symbol bans reversing direction at that location, usually because sight distance or oncoming traffic makes the turn dangerous. Find a safer place — a driveway or a later intersection — to turn around.
11. A center lane is bordered on each side by a solid yellow line with a broken yellow line inside it, and white left-turn arrows are painted for both directions. How may you use this lane?
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Correct answer: A. A two-way left-turn lane is shared by both directions for left turns only. Enter just before your turn, watch for opposing drivers using the same lane, and never travel or pass in it. Turn, do not cruise.
12. A round yellow sign with a black X and the letters RR is posted well before a crossing. What does that advance sign tell you?
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Correct answer: A. The circular railroad advance sign gives you time to slow, scan both ways, and be ready to stop. Do not stop on the tracks. Circle plus X means rails are coming; the crossbuck at the tracks is the actual yield-to-train sign.
13. On a highway you pass a white regulatory sign reading MINIMUM SPEED 40. Why is that sign posted?
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Correct answer: D. A minimum speed sign requires you to travel at least the posted speed when conditions allow. Highways post it because vehicles moving far below the flow cause rear-end and lane-change crashes. Too slow can be as dangerous as too fast.
14. A freeway lane is marked with white diamond symbols, and a sign says the lane is for high-occupancy vehicles (HOV 2+). Who may drive in it during the posted hours?
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Correct answer: B. Diamond-marked HOV lanes are reserved for vehicles meeting the posted occupancy, like two or more people in an HOV 2+ lane. Rewarding shared rides moves more people in fewer cars. The diamond means special rules, so read the sign before entering.
15. A white vertical rectangle reads SPEED LIMIT 55. What does that number legally mean?
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Correct answer: C. A white rectangular speed limit sign is a regulatory sign, so the number is the maximum lawful speed in ideal conditions. Rain, fog, or heavy traffic can make even that speed illegal. Treat the posted number as a ceiling, not a target.
16. A yellow diamond sign ahead shows a plus symbol, like a small cross. What is this sign warning you about?
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Correct answer: A. The crossroad symbol warns that a full intersection is ahead, so vehicles may pull out or turn from the left or right. Slow down and scan both directions. Picture the plus sign as two roads meeting.
17. You plan to leave the freeway at exit 12. How will you know which ramp is yours?
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Correct answer: B. Freeway exits carry green guide signs topped with a numbered exit panel, and the number usually matches the nearest milepost. Match the posted number to your planned exit, then move into the exit lane early.
18. You are driving at night and can only make out the eight-sided outline of a sign ahead. Even before reading it, what does that shape tell you to do?
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Correct answer: C. The octagon is reserved for stop signs alone, so the shape itself orders a full stop. This lets you obey the sign even when snow, glare, or darkness hides the word. Eight sides always equals stop.
19. Small green signs with numbers appear every mile along the edge of the highway. What are these mile markers mainly used for?
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Correct answer: C. Mile markers count the distance across a route, letting you track your progress, judge how far your exit is, and give an exact location when you call for help. Note the nearest marker whenever trouble starts.
20. Ahead of a raised concrete median you see a white sign reading KEEP RIGHT with an arrow curving to the right. What should you do?
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Correct answer: A. KEEP RIGHT tells you the roadway splits around an island, median, or obstruction, and all traffic must pass on the right side. Passing left would put you into oncoming lanes. Follow the arrow around the obstacle, then continue straight.
21. On any road sign, what does the color red signal to drivers?
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Correct answer: D. Red is reserved for the strongest commands: stop, yield, do not enter, and wrong way. It marks actions that are forbidden or must halt. When red appears, something about your movement has to change right now.
22. A sign at an intersection shows a left-curving arrow inside a red circle with a diagonal slash. What must you do there?
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Correct answer: D. A slashed left arrow forbids left turns at that intersection, often because turning across oncoming traffic there causes crashes or blocks flow. Plan another route, such as continuing straight and circling the block. The slash cancels only the movement shown.
23. A yellow diamond sign ahead displays a bold T symbol. What does this sign mean you will have to do soon?
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Correct answer: D. A T-symbol warning means your road dead-ends at a cross street, so you must slow, yield to crossing traffic, and turn left or right. The letter T shows exactly how the roads meet ahead.
24. Leaving a one-way street, you see a yellow diamond sign with two vertical arrows pointing in opposite directions. What is it warning you about?
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Correct answer: A. The two-way traffic sign warns that the one-way section is ending and vehicles will now come toward you. Keep to the right and use extra care when passing. Two opposite arrows mean the road now flows both ways.
25. While driving, you notice a brown sign with white letters pointing toward a destination. What kind of place does a brown sign identify?
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Correct answer: A. Brown signs guide you to recreational and cultural spots such as parks, campgrounds, monuments, and historic sites. The earthy brown color hints at outdoor places. When you are hunting for scenery or history, follow the brown signs.
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