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.
Question 1 of 25
1. A yellow diamond sign ahead shows a plus symbol, like a small cross. What is this sign warning you about?
Show answer & explanation
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.
2. Along a curb you see a white sign with a large letter P inside a red circle and slash. What does it tell you?
Show answer & explanation
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.
3. 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?
Show answer & explanation
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.
4. In a work zone, an orange sign warns of a flagger ahead. The flagger signals you to stop, even though the traffic light beyond is green. What should you do?
Show answer & explanation
Correct answer: C. Flaggers control traffic through work zones, and you must obey their directions even when they conflict with posted signs or signals. They can see hazards you cannot. Remember: in a work zone, the person outranks the light.
5. 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?
Show answer & explanation
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.
6. At the top of a ramp you see a square sign with a red circle and a white horizontal bar reading DO NOT ENTER. What does it mean?
Show answer & explanation
Correct answer: A. DO NOT ENTER marks a roadway where traffic flows toward you, such as an exit ramp or one-way street. Entering it risks a head-on crash. If you have already turned in and see WRONG WAY, pull over and turn around safely.
7. A yellow diamond sign shows a car with wavy skid marks trailing behind its tires. When does this warning matter most?
Show answer & explanation
Correct answer: D. The skidding-car sign warns that the road ahead becomes slippery when wet, so slow down and avoid sudden braking or sharp steering in rain, snow, or ice. The first minutes of rain are often the slickest, as water lifts oil off the pavement.
8. A horizontal black sign with a white arrow and the words ONE WAY points to the left at an intersection. What does it tell you?
Show answer & explanation
Correct answer: C. A ONE WAY sign means every vehicle on that street must travel in the arrow's direction. Driving against it puts you head-on into traffic. Before turning onto any city street, glance for the arrow and follow where it points.
9. A yellow diamond sign ahead displays a bold T symbol. What does this sign mean you will have to do soon?
Show answer & explanation
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.
10. Without reading any words, what does a yellow, diamond-shaped sign always tell you?
Show answer & explanation
Correct answer: C. Yellow diamonds are warning signs: they alert you to hazards or changing conditions such as curves, intersections, or merging traffic. They advise rather than order. Shape and color alone should make you lift off the gas.
11. While driving, you notice a brown sign with white letters pointing toward a destination. What kind of place does a brown sign identify?
Show answer & explanation
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.
12. You see a white square sign showing a curved U-shaped arrow inside a red circle with a slash through it. What is prohibited?
Show answer & explanation
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 always means the pictured move is forbidden.
13. You plan to leave the freeway at exit 12. How will you know which ramp is yours?
Show answer & explanation
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.
14. Wide white stripes cross the pavement ahead, marking a crosswalk. What do these markings require of you as a driver?
Show answer & explanation
Correct answer: C. Crosswalk stripes show where pedestrians are expected to cross, and drivers must yield to people within them. You stop only when someone is crossing or a sign or signal requires it. Painted stripes mean feet ahead.
15. A white vertical rectangle reads SPEED LIMIT 55. What does that number legally mean?
Show answer & explanation
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, never a target.
16. Which sign shape and color combination marks an interstate route?
Show answer & explanation
Correct answer: D. Interstate routes are marked by a shield split into a red band on top and a blue field below, with white numbers. Spotting the shield quickly helps you follow or avoid a freeway. Shield equals interstate.
17. On a highway you pass a white regulatory sign reading MINIMUM SPEED 40. Why is that sign posted?
Show answer & explanation
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.
18. A yellow diamond sign shows two arrows curving apart around an oval island. What is this sign telling you about the road ahead?
Show answer & explanation
Correct answer: D. The divided highway begins sign means opposing traffic will soon be separated by a median or barrier. Stay right of the divider and do not cross it. Picture the two arrows as lanes splitting around an island you must not enter.
19. You see a yellow diamond sign showing an arrow that bends left, then right, then left again. What does this sign tell you about the road ahead?
Show answer & explanation
Correct answer: C. A winding road sign warns of three or more curves in a row, while a single-bend arrow marks just one curve. Knowing the difference helps you hold a safe speed. Think: a wiggly arrow means the wiggles keep coming.
20. You see a red-and-white triangular sign reading YIELD as you approach a traffic circle. What should you do?
Show answer & explanation
Correct answer: B. A yield sign tells you to slow down, check for traffic with the right-of-way, and stop only when necessary to let it pass. It keeps merges smooth without forcing pointless stops. Think of yield as give way, not always stop.
21. You see a five-sided sign shaped like a schoolhouse outline, in fluorescent yellow-green, showing two walking figures. What does the pentagon shape identify?
Show answer & explanation
Correct answer: D. The pentagon shape is reserved for school signs, warning of a school zone or crossing where children may be walking. The fluorescent yellow-green color grabs attention near schools. Think of the five-sided shape as a little schoolhouse to remember it.
22. You are in the right lane when you see a yellow diamond sign showing the right lane narrowing into the left lane. What should you do?
Show answer & explanation
Correct answer: B. A lane-ends sign warns your lane will disappear, so signal, match the other lane's speed, and merge before the pavement runs out. Drivers in the ending lane must yield to through traffic. Early, smooth merges prevent the last-second squeeze.
23. 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?
Show answer & explanation
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.
24. A wide white bar is painted across your lane just before an intersection with a stop sign. Where must you stop?
Show answer & explanation
Correct answer: D. A stop line marks the exact place to stop: bring your vehicle to a halt before the bar, not on or past it. It keeps you clear of crosswalks and cross traffic. The bar is the boundary.
25. 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?
Show answer & explanation
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.
Your result
0 / 25